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Патент USA US3067995

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Dec. 11, 1962
3,067,978
P. J. NATHO
TOP_ ENTRY BALL VALVE
Filed 00’0. 31, 1960
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INVENTOR.
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Dec. 11, 1962
P. J. NATHO
3,067,978
TOP ENTRY BALL VALVE
Filed Oct. 31, 1960
2 Sheets-Sheet 2
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INVENTOR.
3,067,978
Patented Dec. 11, 1962
2
stream seal increases as the line pressure increases and
3,667,978
TOP ENTRY BALL VALVE
Paul J. Natho, Houston, Tex., assignor to ACF Industries,
Incorporated, New York, N.Y., a corporation of New
Jersey
Filed Oct. 31, 19st), Ser. No. 65,122
13 Claims. (Cl. 251-172)
This invention relates to spherical plug valves, com
monly referred to as “ball valves,” and more particularly
to a top entry ball valve having a non-?oating valve
member and a resilient seat member under controlled
restraint which seals by pressure actuation both upstream
and downstream over the full pressure range of the valve.
Ball valves are quite old in the art. They are generally
comprised of a valve body having a central valve cham
ber, a general spherical valve member positioned in the
the various resilient materials used do not have su?‘icient
internal strength to withstand the higher load developed
by increased line pressure. As the size of the valve
increases, this even becomes a greater problem because
the unit load on the seat becomes greater. Another
reason for the limitation in pressure rating is that as the
valve rotates between positions an unsupported portion
of the upstream seat is exposed to line pressure which
tends to force the unsupported portion of the seat into
the run of the valve where it can be cut by trailing edge
of the passage in the valve member. This will take
place even though the seats are not designed primarily
for pressure actuation.
15
The ball valve of the present invention overcomes the
above~mentioned shortcomings. It is of the top entry
type having a unitary body provided with an open top
chamber interposed between axially aligned inlet and
valve chamber, and one or two seat members between
the valve member and the end of the valve chamber.
The valve member has an internal passage which in the
outlet ports. The valve chamber has end walls which
surround the inlet and outlet passages. The valve cham
open position of the valve registers with the inlet and
ber is shorter in axial length through the axis of the
outlet ports to form the run of the valve, and a stem
passages than in transverse width. A seat pocket is
which projects through the body providing means to
formed in each end wall. The seat pocket is made up
rotate the ball 90° between the open and closed posi
of an annular side wall coaxial with the passage, but
tions. Originally, seat members for ball valves were 25 of a greater diameter than the passage, and a diverging
formed of various rubber-like materials; however, with
the improvement of the inert plastics—more particularly
ethylene polymers containing ?uorine-the trend has been
toward utilization of such plastics. Various ball valves
having rubber type seats have been of the top entry
wall which intersects the passage and diverges axially
outward of the valve chamber to intersect the annular
wall. An annular seat member formed of resilient mate
rial is positioned in each seat pocket. Each seat mem
ber in cross section is of generally triangular con?gura
type. that is, there is an open top valve chamber and
tion. The base of the triangle forms a cylindrical wall
the ball and valve seats are inserted through this open
contacting the annular wall of the seat pocket. One
ing which is later closed by a bonnet. Top entry con
angular wall lies adjacent the diverging wall of the pocket.
struction is bene?cial in that it permits a renewing of
The other angular wall extends into the valve chamber
the seats and valve member while the valve remains in ' with a portion thereof forming the valve seat face. A
the line. Moreover, the top entry type lends itself to a
rotatable valve member has generally spherical seating
unitary body structure which can carry line strain much
surfaces and an internal passage which in the open posi-,
more e?‘iciently than bodies having joints which are re
tion of the valve registers with the inlet and outlet port
quired to transmit line strain. Since the rubber-like
to form the run of the valve. The valve member along
material used in the seats could be relatively easily de 40 the axis of the passage is shorter than along an axis
formed, there was no great problem in compressing the
through the spherical seating surfaces. This construc
seats and valve members together and inserting them
tion permits the valve member, when the passage is aligned
as a unit into the valve chamber. However, the ?uoro
with the inlet and outlet ports, to be inserted into the
carbon plastics are generally rather hard and are not
valve chamber. To controllably restrain the seat mem
easily deformed and have presented a problem of 45 bers, there are hollow frusto conical seat retainers which
assembly.
are placed over the passage ends of the valve and inserted
Most of the seals established in ball valves have been
with the valve member into the valve chamber. The
of the compression type. Each seat is compressed be;
frusto conical seat retainers are positioned between the
tween the valve member and an end wall of the body
seat members and seat retainer lugs in the wall of the
to build up an internal force in the seat member which 50 chamber. While the seat retainers permit the seat mem
causes the seat member to maintain intimate contact with
bers to move su?‘iciently to pressure act, they prevent them
the spherical surface of the valve member and the end
from moving into the run when unsupported whereby
wall of the body, thereby establishing a seal between
the body and the seat member and a seal between the
valve member and the seat member. The compression
provides not only the initial seal, but also the seal used
for the normal functioning of the valve. Accordingly,
they could be cut during rotation of the valve member.
The. valve member is provided with a hearing which
cooperates with a trunnion in the bottom wall of the
chamber to journal the valve member in position. When
the valve member is rotated to a closed position to con
tact the seats,>a slight initial interference occurs between
the initially built-in compression, the valve will leak.
the seats and the spherical surface of the valve member.
In order to overcome this disadvantage to a certain 60 However, the seal does not depend solely on this initial
extent, many of the ball valves have a valve member
interference. Line pressure from the upstream side will
should there be sul?cient wear of the seat to decrease
which is free ?oating, that is, line pressure will force
the valve member against the downstream seat. In such
force the upstream seat into tight sealing contact with
the surface of the ball and the annular wall of the pocket.
case, there is no upstream seal and the valve will not be
The seat, ball and pocket are so arranged that a wedge
suitable for block and bleed service or other services 65 is formed and the pressure forces the seat member
where an upstream seal is desirable. Also, both rubber
and plastic have limitations as to internal strength, and
accordingly valves using such materials have been gen
erally limited to a low pressure range; for example in a
2" size to 300-1?»E and lower. One reason for this is that
with a free ?oating ball the bearing load on the down
toward the apex of the wedge. If the upstream seal leaks,
line pressure will enter the valve chamber and cause the
downstream seat member to similarly pressure act. This
time the seat member will be forced into intimate seal
ing contact with the valve member and diverging wall of
the seat pocket. Due to the construction, either seat will
3,667,978
3
4
act as an upstream or downstream seat and ?ow can be
in each end wall 16. Each seat pocket 20 has an an
nular side wall 22 coaxial with the axis of the passage,
but of a greater diameter than the passage.
in either direction.
The seat retainers prevent the seat
members from being extruded.
Extending transversely from the axial outer end of
It is the principal object of the present invention to
provide a top entry ball valve having a non-floating 5 the annular wall 22 is a rear wall 24. A diverging wall
valve member and a resilient seat member under con
26 intersects each passage and diverges axially outward
trolled restraint which provides a pressure actuated seal
of the valve chamber to intersect the rear wall 24. While
the rear wall 24 is desirable, it is possible to extend the
either upstream or downstream in the closed position
diverging wall 26 outward until it intersects the annular
over the entire pressure range of the valve.
It is an object to provide a top entry ball valve hav 10 wall 22.
Positioned in the seat pocket 20‘ are resilient plastic
ing a trunnioned valve member and a resilient seat mem
seat members B-B. The seat members B--B are prefer
ber under controlled restraint in which the geometry of
ably formed of one of the ethylene polymers containing
the seat member is such that the seat member is pressure
?uorine such as tetra?uorethylene which is commercially
actuated both upstream and downstream to form a seal
available under the trademark “Te?on.” Each seat mem
for the valve.
ber B has a cross-sectional con?guration de?ning a cylin
It is another object to provide a top entry ball valve
drical wall 28, rear end wall 30, and front end wall 32,
having a valve member provided with a generally spher
which extend perpendicularly from the ends of the cylin
ical sealing surface in which the axial length of the
drical Wall 28 and two converging angular walls 34 and
valve member through the passage is shorter than the
axial length through a spherical seating surface whereby 20 36. The cylindrical wall 28 is positioned against the
annular side wall 22 of the seat pocket 20. The rear
end wall 30 contacts the rear wall 24 of the seat pocket
20 and the front end wall 32 extends into the valve
chamber 14. The rear angular wall 34 contacts the
diverging wall 26 of the seat puck 20 and the front angu
lar wall 36 forms the seat face for the seat member.
Both seat members B-B are identical and can be used
in either seat pocket of the valve. Each seat member
B—B is retained in its seat pocket 20 by a hollow frusto
ing the time that a portion thereof is unsupported while
the valve is being operated.
30 conical seat retainer 38 which exerts controlled restraint
on the seat member B. The small end of the seat re
It is a more speci?c object to provide a top entry ball
tainer 38 is positioned against the front wall 32 of the
valve having pressure-actuated resilient seat members,
seat member B. The large end of the seat retainer
and a valve member with spherical seating surfaces hav
38 is located adjacent a number of seat retainer lugs 40
ing a shorter axial length along the passage so that a
frusto conical seat retainer can be positioned on either u which are cast in the walls of the valve chamber 14.
the ball and seat retainer can be inserted into the cham
ber when the passage is aligned with the passage of the
valve and upon rotation will contact and make sealing
engagement contact with the seat member.
It is another object to provide a top entry ball valve having a non-?oating valve member and a resilient seat
retainer member which is so designed that the seat mem
ber is under controlled restraint and will not extrude dur
end of the passage and the assembly inserted between
Preferably there are three lugs 40 in the valve cham
ber 14. A fourth lug 40 is located on the inner wall of
the seat members, the seat retainers controllably restrain
the bonnet D.
ing movement of the seat members.
The rotatable valve member C is provided with gener
Other and further objects of the invention will be
obvious upon and understanding of the illustrative em 40 ally spherical seating surfaces 42—-42 and an internal
passage 44 which when the valve is in the open position
bodiment about to be described, or will be indicated in
registers with the inlet and outlet ports 10 and 12 to
the appended claims, and various advantages not referred
form the run of the valve. The valve member C along
to herein will occur to one skilled in the art upon the
the axis of the passage 44 is shorter than along an
employment of the invention in practice.
A preferred embodiment of the invention has been 45 xis through the spherical seating surfaces 42—42 and
is provided with the rounded nose portions 46—46.
chosen‘ for the purpose of illustration and description and
The axial length of the ball through the passage 44
is shown in the accompanying drawings, forming a part
is approximately the same length as the distance between
of the speci?cation, wherein:
the end walls 18——18, which permits the ball when the
FIG. 1 is a central vertical section through a valve
with the present invention, the valve being shown in the 50 passage 44 is aligned with the passages 10 and 12 to be
inserted into the valve chamber 14. In this position,
open position.
the rounded noses 46~46 do ‘not quite make contact
FIG. 2 is a fragmentary sectional view of the valve
with the seat faces 36—36 of the seat members B-B.
shown in FIG. 1, taken generally along lines 2—2 of
FIG. 1, the valve being in the closed position.
Each frusto conical seat retainer 38 has an internal di
FIG. 3 is a fragmentary cross section in the region of
the seat member illustrating the action of the seat mem
ber to upstream line pressure.
ameter greater than the end portion of the valve mem
ber C. The seat retainers 38-38 are positioned over
the nose portions 46——46 of the valve member C and are
inserted into the valve chamber 14 with the valve mem
FIG. 4 is a view similar to FIG. 3 showing the action
ber C. The bottom of the valve member C is provided
to downstream pressure.
60 with a bearing 48 which is journaled over the trunnion
FIG. 5 is a cross sectional view of the seat member.
Referring now to the drawings, the valve is comprised
16. The top of the valve member C may be provided
with a cylindrical portion 50 which is journaled in a
generally of a valve body A, two seat members B—B,
mating bearing in the bonnet D. Naturally, if desired,
a spherical valve member C, and a bonnet D.
The valve body A has two axially aligned ?uid pas
other means may be used to trunnion the valve member
C to secure it against axial movement. The top of the
sages 10 and 12 forming inlet and outlet ports respec
valve member C is also provided with a projection 52
tively. The axial outer ends of the passages 10 and 12
are provided with means to attach the valve to a ?ow
which cooperates with a keyway slot 54 in an operating
system as is well known in the art. Interposed be
stem 56. However, if desired, the operating stem may
tween the two passages 10 and 12 is an open top valve
be made integral with the valve member C.
chamber 14. A centrally located trunnion 16 forms part 70
The bonnet D provides a cover for the open top valve
of the bottom wall of the chamber 14. The chamber
chamber 14 with the inner wall of the bonnet D forming
has opposed end walls 1,8--18 which surround the pas
‘the top wall of the valve chamber 14. The bonnet is
sages 10 and 12. The distance between the end walls
provided, with an opening 58 through which the valve
18-—18 is smaller than the distance between the side
operating stem 56 extends. As is customary, packing
walls of the chamber 14. A seat pocket 20 is formed 75 means 69 is provided around the stem 56 to prevent leak
5
6
age between the stem 56 and passage $8. The bonnet
only subject to line pressure and is not subject to the
compressive force as would be the case if the valve
member were free to ?oat against the downstream seat
member.
D may be secured to the top of the valve body A by
utilization of bolts 62, and a gasket d4 may be used to
prevent leakage between the body A and bonnet D.
Since a shortened ball is used, the spherical seating
As can be seen from the foregoing, the present inven
surfaces 46—46 will be slightly greater than the custo
tion, in one of its general aspects, is directed to the pro
vision of a ball valve having resilient plastic seat mem
mary ratio of ball diameter to bore diameter. However,
the overall space occupied by the ball of the valve mem
[bers which are under controllable restraint from a seat
ber C will be smaller than if a completely spherical ball
retainer. The seat retainer prevents upstream line pres
were utilized. By using the shortened ball valve member 10 sure from extruding the upstream seat. Moreover, the
seat retainer affords support to the portion of the seat
C, the valve can be assembled by the top entry method
member which is unsupported during operation-that
without any interference between the valve member C
and the seat members B—B thereby eliminating damage
portion adjacent the passage of the valve member—-and
to the seat members B—B during assembly. The frusto
restrains it from ?owing into the run of the valve where
conical seat retainers 33 are such that they can be placed _
it could be sheared by the opposite side of the passage.
The invention further provides a novel arrangement for
over the shortened end of the valve member C and
a top entry ball valve which by ‘having a shortened valve
inserted with the valve member into the valve chamber
member and recessed seat members is easy to assemble
14. The shape of the seat retainer 38 is such that a
without danger of damaging the seat members. The seat
wide cross section having ample strength can be utilized
retainers are so designed'that they may be placed over
Without materially increasing the diameter of the valve
the nose of the valve member and inserted simultaneously
chamber 14; If for any reason it is necessary to inspect
with the valve member into the valve chamber.
_
the seat member B-—B and valve member C, the valve
member C and seat members B—B can be easily removed
As various changes may be made in the form, con
struction and arrangements of the parts herein without
without damaging the seat members B—B. After they
departing from the spirit and scope of the invention and
have been inspected, they can be replaced and reused.
without sacri?cing any of its advantages, it is to be un
As previously mentioned, the seat members B--B are
derstood that all matter herein is to be interpreted as
pressure actuated and the geometry is such that each
illustrative and not in a limiting sense.
conical seat face 36 is tangential to its spherical surface
What I claim is:
42 at a point of contact which is approximately 45° to
l. A top entry ball valve comprising a valve body hav
the axis through the run of the valve. The seat members 30
ing two axially aligned ?uid passages forming inlet and
B—B and valve member C are so designed that there is
outlet ports and an open-top valve chamber interposed
a slight initial interference between the valve member
between said passages, said chamber including side walls,
C and seat members B—B when the valve is in a closed
position. The interference may be in the neighborhood
a bottom wall having a centrally located trunnion and
of .005 lto .0015 of an inch. The seat member B, spher 35 end walls surrounding said passages, the distance between
the side walls being greater than the distance between
ical seating surface 42 of the valve member C, and seat
pocket 20 are so arranged that a wedge is formed there
the end walls, a seat pocket in each end wall, each
pocket being formed of an annular side wall coaxial
between and line pressure will force the seat member
B toward the apex of the wedge. For example, on the
with the axis of the passages but of a greater diameter
upstream side the line pressure will ?ow between the 40 than the diameter of the passage, a rear wall transverse
to the passage and a diverging ‘wall intersecting the pass
diverging wall 26 of the seat pocket and angular wall
age and diverging axially outward of the valve chamber to
34 of the seat member B and force the seat face 36 into
intersect the rear wall, an annular seat member formed
sealing contact with the spherical surface 42 of the valve
of resilient plastic material positioned in each seat pocket,
member C. At the same time it will force the cylindrical
each seat member having a cross sectional con?guration
wall 28 into sealing contact with the annular wall 22 of
the seat pocket, see FIG. 3. The seat retainer 38 being
adjacent to the front wall 32 of the seat member B will
de?ning a cylindrical wall contacting the annular side
Wall of the seat pocket, rear and front end Walls extend
ing perpendicularly from the cylindrical wall, the rear end
prevent the seat from being blown downstream and ex
truded. The seat retainer 38 also functions during the
operation of the valve to prevent the unsupported por~
tion of the upstream seat from being pushed out of its
wall positioned against the rear wall of the seat pocket,
the front end wall extending into the valve chamber, and
rear and front angular walls extending from the rear
and front end walls, the rear angular wall positioned
against the diverging wall of the seat pocket and the
front angular wall forming a seat face, a rotatable valve
member having an internal passage which in the open
position of the valve registers with the inlet and outlet
ports to form the run of the valve and generally spherical
pocket during the time it is unsupported whereby it would
be in the path of the opposite side of the passage which
could shear it off. If the upstream seat member de
velops a leak, line pressure will ?ow into the chamber 14
and will contact the end face 32 of the downstream seat
member B and ?ow between the cylindrical wall 28 and
annular wall 22 of the seat pocket forcing the seat face
36 into sealing contact with the spherical surface 42 of
the valve member C and forcing the rear annular face
26 of the downstream seat member B into sealing con
tact with the diverging wall 26 of the seat pocket 20,
see PEG. 4. Accordingly, a seal is again established for
the valve.
seating surfaces, the valve member along the axis of the
passage being shorter than the distance along an axis
through the spherical seating surfaces permitting the valve
member when the passage is aligned with the inlet and
outlet ports to be inserted into the valve chamber and
when rotated to a closed position to contact the seats
in a sealing condition whereby there is a slight interfer
ence between the seats, a pair of hollow frusto conical
seat retainers, one placed over each end of the passage
of the valve member and inserted with the valve member
into the valve chamber, a bonnet closing the valve cham
ber having an inner wall forming a top wall for the
The seat members B—B are so formed that
they will seal upstream and downstream. Accordingly,
?ow may be from either direction. If an upstream seat
should fail, the valve will still function since the down
stream seat will properly function to tightly seal the
valve. Further, the valve may be used for block and
bleed service in the closed position since an upstream 70 valve chamber, seat retainer lugs.on the walls of the
seal will be established at each end of the valve. Since
valve chamber and the inner wall of bonnet, the small
the valve member C is trunnioned and the seat member's
end of the frusto conical seat retainer positioned adjacent
B—B are preferably made from a ?uorocarbon plastic,
the front end wall of the seat member, the large end
which has inherently low friction characteristics, the valve
will be easy to operate. Further, each seat member is
75
of the frusto conical retainer positioned adjacent the
seat retaining lugs permitting the seat member to move
3,067,978
8
a controlled amount in response to line pressure to effect
a seal but prohibiting movement into the run whereby it
would be cut during operation of the valve, said valve
member having a bearing, the bearing of the valve mem
ber journaied on the trunnion in the bottom wall of
the chamber, the top of the valve member provided with
a trunnion and the inner wall of the bonnet with a mating
bearing receiving the trunnion of the valve member, the
top of the valve member also provided with a projection,
an operating stem, one end of said stem provided with
a slot cooperating with the projection on the valve mem
ber, the bonnet having an opening through which the
axially outward of the valve chamber to intersect the
annular wall, an annular seat member formed of resilient
plastic material positioned in each seat pocket, each seat
member having a cross sectional con?guration de?ning
a cylindrical wall contacting the annular side wall of
the seat pocket, rear and front end wall extending per
pendicularly from the cylindrical wall, the rear end wall
positioned adjacent the diverging wall of the seat pocket,
the front end wall extending into the valve chamber, and
rear and front angular walls extending from the rear and
front end walls, the rear angular wall positioned against
the diverging wall of the seat pocket and the front angu
lar wall forming a seat face, a rotatable valve member
operating stem extends, and means establishing a seal
having an internal passage which in the open position
between the operating stem and the opening in the bonnet.
2. A top entry ball valve comprising a valve body 15 of the valve registers with the inlet and outlet ports to
form the run of the valve and generally spherical seating
having two axially aligned ?uid passages forming'inlet
surfaces, a pair of hollow frusto conical seat retainers,
and outlet ports and on open-top valve chamber inter
one placed over each end of the passage of the valve
posed between said passages, said chamber including side
member and inserted with the valve member into the
walls, a bottom wall and end walls surrounding said pas
sages, the distance between the side walls being greater ,, valve chamber, a bonnet closing the valve chamber hav
ing an inner wall forming a top wall for the valve cham
than the distance between the end walls, a seat pocket in
her, seat retainer lugs on the walls of the valve chamber
each end wall, each pocket being formed of an annular
and the inner wall of bonnet, the small end of the frusto
side wall coaxial with the axis of the passages but of a
conical seat retainer positioned adjacent the front end
greater diameter than the diameter of the passage, a
wall of the seat member, the large end of the frusto
rear wall transverse to the passage and a diverging wall
intersecting the passage and diverging axially outward of
conical retainer positioned adjacent the seat retaining
the valve chamber to intersect the rear wall, an annular
lugs permitting the seat member to move a controlled
seat member formed of resilient plastic material posi
amount in response to line pressure to effect a seal but
cylindrical wall, the rear end wall positioned against the
bonnet having an opening through which the operating
rear wall of the seat pocket, the front end wall extending
into the valve chamber, and rear and front angular walls
extending from the rear and front end walls, the rear
operating stem and the opening in the bonnet.
4. A top entry ball valve comprising a valve body hav
prohibiting movement into the run whereby it would be
tioned in each seat pocket, each seat member having a
cross sectional con?guration de?ning a cylindrical wall 30 cut during operation of the valve, means securing the
valve member against axial movement, an operating stem
contacting the annular side wall of the seat pocket, rear
having one end cooperating with the valve member, the
and front end wall extending perpendicularly from the
angular wall positioned against the diverging wall of the
seat pocket and the front angular wall forming a seat
face, a rotatable valve member having an internal passage
which in the open position of the valve registers with the
inlet and outlet ports to form the run of the valve and
generally spherical seating surfaces, the valve member
stem extends, and means establishing a seal between the
ing two axially aligned ?uid passages forming inlet and
outlet ports and an open-top valve chamber interposed
between said passages, said chamber including side walls,
a bottom wall having a centrally located trunnion, end
walls surrounding said passages, the distance between the
side walls being greater than the distance between the
end walls, a seat pocket in each end wall, each pocket
being formed of an annular side wall coaxial with the
along the axis of the passage being shorter than the
distance along an axis through the spherical seating sur
faces permitting the valve member when the passage is 45 axis of the passages but of a grea'er diameter than the
diameter of the passage, a rear wall transverse to the
aligned with the inlet and outlet'ports to be inserted into
passage and a diverging wall intersecting the passage and
the valve chamber, a pair of hollow frusto conical seat
diverging axially outward of the valve chamber to inter
retainers, one placed over each end of the passage of
sect the rear wall, an annular seat member formed of
the valve member and inserted with the valve member
into the valve chamber, a bonnet closing the valve cham 50 resilient plastic material positioned in each seat pocket,
each seat member having a cross sectional con?guration
ber having an inner wall forming a top wall for the valve
de?ning a cylindrical wall contacting the annular side
chamber, seat retainer lugs on the walls of the valve
wall of the seat pocket, rear and front end wall extending
chamber and the inner wall of bonnet, the small end of
perpendicularly from the cylindrical wall, the rear end
the frusto conical seat retainer positioned adjacent the
front end wall of the seat member, the large end of the 55 wall positioned against the rear wall of the seat pocket,
the front end wall extending into the valve chamber, and
frusto conical retainer positioned adjacent the seat re
rear and front angular walls extending from the rear and
taining lugs permitting the seat member to move a con
trolled amount in response to line pressure to effect a
seal but prohibiting movement into the run whereby it
would be cut during operation of the valve, means secur
ing the valve member against axial movement, an oper
ating stem, one end of said stem cooperating with the
valve member, the bonnet having an opening through
which the operating stem extends, and means establish
ing a seal between the operating stem and the opening
in the bonnet.
3. A top entry ball valve comprising a valve body hav
ing two axially aligned ?uid passages forming inlet and
outlet ports and an open-top valve chamber interposed
between said passages, said chamber including a bottom
wall, end walls surrounding said passages, a seat pocket
in each end wall, each pocket being formed of an annu
lar side wall coaxial with the axis of the passages but of a
greater diameter than the diameter of the passage, a
diverging wall intersecting the passage and diverging
front end walls, the rear angular wall positioned against
the diverging wall of the seat pocket and the front angular
wall forming a seat face, a frusto conical seat retainer
having its small end positioned against the front end wall
of the seat member, seat retaining lugs in Wall of the
chamber which contact the large end of the seat retainer,
a rotatable valve member having an internal passage
which in the open position of the valve registers with the
inlet and outlet ports to form the run of the valve, gen
erally spherical seating surfaces, the valve member along
the axis of the passage being shorter than the distance
along an axis through the spherical seating surfaces per
mitting the valve member when the passage is aligned
with the inlet and outlet ports to be inserted into the
valve chamber and when rotated to a closed position to
contact the seats in a sealing condition whereby there is a
slight interference between the seats, said valve member
having a bearing, the bearing of the valve member jour
3,067,978
9
r
10
triangle forming a rear angular wall positioned against the
diverging wall of the pocket and the front angular side
of the triangle forming a valve seat face extending into
naled on the trunnion in the bottom Wall of the chamber,
the top of the valve member provided with a projection,
an operating stern, one end of said stem provided with a
slot cooperating with the projection of the valve member,
the other end of said stem extending through the opening
of the chamber, a bonnet closing the opening of the
the valve chamber, a rotatable valve member having an
internal passage which in the open position of the valve
registers with the inlet and outlet ports to form the run
chamber, said bonnet having an opening through which
the operating stem extends, the bonnet provided with
bearing and the top of the valve member provided with a
trunnion which is journaled in the bearing in the bonnet, 10
valve member along the axis of the passage being shorter
than the distance along an axis through the spherical seat
and means establishiing a seal between the operating
stem and opening in the bonnet.
5. A top entry ball valve comprising a valve body hav
ing two axially aligned ?uid passages forming inlet and
outlet ports and an open-top valve chamber interposed
between said passages, said chamber including side walls,
a bottom wall having a centrally located trunnion and end
walls surrounding said passages, the distance between the
side walls being greater than the distance between the
end walls, a seat pocket in each end- wall, each pocket
formed of an annular side wall coaxial with the axis of
the passages but of a greater diameter than the diameter
of the passage and an outer wall intersecting the passage
of the valve and generally spherical seating surfaces, the
ing surface permitting the valve member when the pas
sage is aligned with the inlet and outlet ports to be in
serted into the valve chamber and when rotated to a
closed position to contact the'seats in a sealing condi
tion whereby there is a slight interference between the
seats, a pair of hollow frusto conical seat retainers, one
placed over each end of the passage of the valve mem
ber and inserted with the valve member into the valve
chamber, a bonnet closing the valve chamber, seat re
tainer lugs in the walls of the chamber and bonnet, each
seat reiainer positioned between the face of the seat mem
ber and seat retainer lugs to retain the seat member in
position, the valve member having a bearing, the bearing
of the valve member journaled over the trunnion in the
chamber, an operating stem, the bonnet having an open
intersect with the annular side wall, an annular seat 25 ing through which one end of the stem extends, means
member formed of resilient material positioned in each
establishing a seal between the stem and opening, the
seat pocket, each seat member having a cross sectional
other end of the stem cooperating with the valve mem
con?guration generally de?ning a triangle with the base
ber.
and diverging axially outward of the valve chamber to
of the triangle forming a cylindrical wall contacting the
annular wall of the pocket, the rear angular side of the
triangle forming a rear angular wall positioned against
the diverging wall of the po.ket and- the front angular
side of the triangle forming a seat face extending into
the valve chamber, a retainer having one end positioned
against the seat face of the seat member and seat re
taining lugs in wall of the chamber which contact the
other end of the seat retainer, a rotatable valve member,
said valve member having an internal passage which in
the open position of the valve registers with the inlet and
outlet ports to form the run of the valve and generally
spherical seating surfaces positioned in the valve cham
ber, the valve member along the axis of the passage being
shorter than the distance along an axis through the spheri
cal seating surfaces permitting the valve member when
the passage is aligned with the inlet and outlet ports to
be inserted into the valve chamber and when rotated to
a closed position to contact the seats in a sealing condition
whereby there is a slight interference between the seats,
said valve member having a bearing, the bearing of the
valve member journaled on the trunnion in the bottom
wall of the chamber, the top of the valve member pro
vided with a projection, an operating stem, one end of
said stem provided with a slot cooperating with the pro
jection of the valve member, the other end of said stem
extending through the opening of the chamber, a bonnet
7. A top entry ball valve comprising a valve body
having two axially aligned ?uid passages forming inlet
and outlet ports and an open-top valve chamber inter
posed between said passages, said chamber including side
walls, a bottom wall and end walls surrounding said pas
sages, the distance between the side walls being greater
35 than the distance between the end walls, a seat pocket in
each end wall, each pocket formed of an annular side
wall coaxial with the axis of the passages but of a greater
diameter than the diameter of the passage and an outer
wall intersecting the passage and diverging axially out
40 ward of the valve chamber to intersect with the annular
side wall, an annular seat member formed of resilient
material positioned in each seat pocket, each seat mem
ber having a cross sectional con?guration generally de
?ning a triangle with the base of the triangle forming a
45 cylindrical wall contacting the annular wall of the pocket,
the rear angular side of the triangle forming a rear angu
lar wall positioned against the diverging wall of the pocket
and the front angular side of the triangle forming a front
angular wall extending into the valve chamber, a portion
of said front angular wall being a valve seat face, a
rotatable valve member having an internal passage which
in the open position of the valve registers with the inlet
and outlet ports to form the run of the valve and generally
spherical seating surfaces, the valve member along the
axis of the passage being shorter than the distance along
closing the opening of the chamber, said bonnet having 55 an axis through the spherical seating surface permitting
an opening through "which the operating stern extends.
the valve member when the passage is aligned with the
6. A top entry ball valve comprising a valve body hav
inlet and outlet ports to be inserted into the valve cham
ing two axially aligned ?uid passages forming inlet and
ber and when rotated to a closed position to contact the
outlet ports and- an open-top valve chamber interposed be
seats in a sealing condition whereby there is a slight in
tween said passages, said chamber including side walls, 60 terfere'nce between the seats, a pair of hollow frusto
a bottom wall having a centrally located trunnion, and
conical seat retainers, one placed over each end of the
end walls surrounding said passages, the distance between
passage of the valve member and inserted with the valve
the side Walls being greater than the distance between the
member into the valve chamber, seat retainer lugs in the
end walls, a seat pocket in each end wall, each pocket 65 Walls of the valve chamber, each seat retainer positioned
forming of an annular side wall coaxial with the axis of
between the face of the seat member and the lugs to re
the passages but of a greater diameter than the diameter
tain the seat member in position, means securing the valve
of the passage and an outer wall intersecting the passage
member against axial movement, an operating stern co
and diverging axially outward of the valve chamber to
operating with the rotatable valve member, a bonnet clos
intersect with the annular side wall, an annular seat mem 70 ing the opening of the chamber, said bonnet having an
ber formed of resilient material positioned in each seat
opening through which the operating stem extends.
pocket, each seat member having a cross sectional con
8. A top entry ball valve comprising a valve body hav
?guration generally de?ning a triangle with the base of
ing two axially aligned fluid passages forming inlet and
the triangle forming a cylindrical wall contacting the an
outlet ports and an open~top valve chamber interposed
nular wall of the pocket, the rear angular side of the 75 between said passages, said chamber including side walls,
3,067,978
to
1l
a bottom wall and end walls surrounding said passages,
the distance between the side walls being greater than
the distance between the end walls, a seat pocket in each
end wall, each pocket formed of an annular side wall
coaxial with the axis of the passages but of a greater
diameter than the diameter of the passage and an outer
wall intersecting the passage and diverging axially out
ward of the valve chamber to intersect with the annular
side wall, an annular seat member formed of resilient
material positioned in each seat pocket, each seat mem
ber having a cross sectional con?guration generally de
?ning a triangle with the base of the triangle forming a
tatable valve member having an internal passage which
in the open position of the valve registers with the inlet
and outlet ports to form the run of the valve and gen
erally spherical seating surfaces, pair of seat retainers,
one placed over each end of the passage of the valve
member and inserted with the valve member into the
valve chamber, seat retainer lugs in the walls of the valve
chamber, each seat retainer positioned between the face
of the seat member and the lugs to retain the seat member
1O in position, an operating stem cooperating with the ro
tatable valve member, a bonnet closing the opening of
the chamber, said bonnet having an opening through which
the operating stem extends, and means to seal between
the stern and opening.
the rear angular side of the triangle forming a rear angular
11. A ball valve comprising a valve body having two
wall positioned against the diverging wall of the pocket 15
axially aligned ?uid passages forming inlet and outlet
and the front angular side of the triangle forming a front
ports and a valve chamber interposed between said pas
angular wall extending into the valve chamber, a por
sages, said chamber including a bottom wall, end walls
tion of said front angular wall being a valve seat face,
surrounding said passages, a seat pocket in each end wall,
a rotatable‘ valve member having an internal passage which
each pocket being formed of an annular side wall co
in the open position of the valve registers with the inlet
axial with the axis of the passages but of a greater di
and outlet ports to form the run of the valve and gen
ameter than the diameter of the passage, a diverging wall
erally spherical seating surfaces, the valve member along
intersecting the passage and diverging axially outward of.
the axis of the passage being shorter than the distance
the valve chamber to intersect the annular wall, an an
along an axis through the spherical seating surface per
mittin‘g the valve member when the passage is aligned 25 nular seat member formed’ of resilient‘ plastic material
positioned in each seat pocket, each seat member having‘
with the inlet and outlet ports to be inserted into the
a face extending into the valve chamber a‘portion of said
valve chamber and when rotated to a closed position to
face being the valve seat face, a rotatable valve member
contact the seats in a sealing condition, a pair of hollow
having an internal passage which in the open position oh
frusto conical seat retainers, one placed over each end
of the passage of the valve member and inserted with the 30 the valve registers with the inlet and outlet ports to‘form.
the run of the valve and generally spherical‘ seating sur
valve member into the‘ valvc'chamber, seat retainer lugs
faces, a pair of seat retainers, one being positioned. be
in the walls of the chamber, each seat retainer positioned
cylindrical wall contacting the annular wall of the pocket,
between the face‘ of the seat member and the lugs to re
tain the seat. members in position, an operating stem co
tween an end of the valve member and seat member,
sea retainer lugs on the walls of the valve chamber, one
operating with the rotatable valve member, a bonnet clos
end of the seat retainer positioned adjacent. the: face of
the seat‘ member the other end of the retainer positioned
adjacent the seat retaining lugs permitting the seatzmem~
ing the opening of the chamber, said bonnet having an
opening through which the operating stem extends.
9. A top entry ball valve comprising a valve body hav
ing two axially aligned fluid passages forming inlet and
her to move a controlled amount in response to line‘
pressure to effect‘ a seal but prohibiting. movement into
outlet ports and an open-top valve chamber interposed 40 the chamber whereby it would be cut during’ operation‘
of- the valve, an operating stem, an opening through which
between said passages, said chamber including side walls,
the operating stem extends, and means to establish a seal
a bottom wall and end walls surrounding said passages,
between the operating stem and opening in the bonnet.
the distance between the side walls being greater than the
12. A ball valve comprising a valve body having two
distance between the end‘ walls, a seat pocket in each end
wall, an annular seat member formed of resilient ma
axially aligned ?uid passages forming inlet and‘ outlet‘
terial positioned in each seat pocket, each seat member
having a face extending into the valve chamber, a por
tion of said face being the valve seat face, a rotatable
valve member having an internal passage which in the
open position of the valve registers with the inlet and
outlet ports to form the run of the valve and generally
ports and a valve chamber interposed between said pas
sages, said chamber de?ned by end walls surrounding said
passages, a seat pocket in each end wall, an annular seat
member formed of resilient material positioned in each
seat pocket, each seat member having a face extending
into, the valve chamber, a rotatable valve member having
an internal passage which in the open position of the
valve registers with the inlet and outlet ports to‘ form
the run of the valve and generally spherical seating sur
spherical seating surfaces, the valve member along the
axis of the passage being shorter than the distance along
an axis through the spherical seating surface permitting
the valve member when the passage is aligned with the
inlet and outlet ports to be inserted into the valve cham
faces, the valve member positioned in the chamber, hollow
ber and when rotated to a closed position to contact the
frusto conical seat retainers placed over each end of
the passage of the valve member, seat retainer lugs in
seats in a sealing condition, a pair of hollow frusto conical
the walls of the valve chamber, each seat retainer posi
tioned between the face of the seat member and its re
seat retainers, one placed over each end of the passage
of the valve member and inserted with the valve member 60 spective seat retainer lug to retain the seat member in
position permitting only limited movement of the seat
into the valve chamber, seat retainer lugs in the walls
member toward the valve member for pressure actuation‘
of said chamber, each seat retainer positioned between
of the seat member, an operating stem cooperating with
the face of the seat member and the lugs to retain the
the rotatable valve member.
seat members in position, an, operating stem cooperating
13. A ball valve comprising a valve body having two
with the rotatable valve member, a bonnet closing the 05
axially aligned ?uid passages forming inlet and outlet
opening of the chamber, said bonnet having an opening
ports and a valve chamber interposed between said pas
through which the operating stem extends.
sages, said chamber de?ned by end walls surrounding said
10. A top entry ball valve comprising a valve body
having two axially aligned ?uid passages forming inlet
and outlet ports and an open-top valve chamber inter
posed between said passages, said chamber including end
walls surrounding said passages, a seat pocket in each
end wall, an annular seat member formed of resilient
material positioned in each seat pocket, each seat member
having a face. extending into the valve chamber, a ro~ 75
passages, a rotatable valve member having an internal
passage which in the open position of the valve registers
with the inlet and outlet ports to form the run of the
valve and generally spherical seating surfaces, the valve
member positioned in the chamber, an annular seat mem
ber formed of resilient material positioned between‘ the
valve member and each end wall ofv the valve chamber,
3,067,978
13
14
hollow frusto conical seat retainers placed over each end
References Cited in the ?le of this patent
UNITED STATES PATENTS
of the passage of the valve member, seat retainer lugs in
the walls of the valve chamber, each seat retainer posi
tioned between the face of the seat member and its re
spective seat retainer lug to retain the seat member in
position permitting only limited movement of the seat
member toward the valve member for pressure actuation
of the seat member, an operating stern cooperating with
the rotatable valve member.
2,839,074
2,861,773
2,883,146
2,940,725
Kaiser _______________ __ June 17,
Clade _______________ __ Nov. 25,
Knox _______________ __ Apr. 21,
Nagel _______________ __ June 14,
1958
1958
1959
1960
FOREIGN PATENTS
460,042
Great Britain _________ __ Jan. 20, 1937
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