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av. 12, 1946.
'
.
D, G, GRISWQLD
2,410,876
PILOT‘ CONTROLLED PRESSURE REGULATING MEANS
Filed May 29, 1943
'
'
4 Sheets-Sheet 1
49
3mm
v Jana/d 6.
‘BMW
Nov. 1.2, 1946.
D. s. GRISWOLD
2,410,876 .
PILOT CONTROLLED PRESSURE REGULATING MEANS
Filed May 29, 1943
4 Sheets-sheet 2
a‘k!1
5
v.
r
V..U
m"
swam/kw
?amldéfé'?lywold
393,43
gm 7‘
M
-
Nov. V12, ‘1946.
D. s. GRISWOLD
'
2,410,876
PILOT CONTROLLED PRESSURE REGULATING MEANS
Filed may 29, 1943
'
4 Sheets-Sheet 3
Nov. 12, 1946.
2,410,876
D. e. GRISWOLD
PILOT CONTROLLED PRESSURE REGULATING MEANS
Filed May 29, 1943
4 Sheets-Sheet 4
3mm
?aw/d i é'mls'wold
W
Patented Nov. 12, 1946
I 2,410,876
E'E'ED §TATES PATENT. QFFEE .
2,410,876
..
PILOT CONTROLLED PRESSURE
REGULATING MEANS
Donald G. Griswold, Alhambra, Calif.
Application May 29, 1943, Serial No. 489,006
14 Claims. (Cl. 50-10)
1
2
The present invention relates to fluid flow con
trol apparatus, and more particularly to a novel
not limited to use with valves of different ca
arrangement of valves and control means for use
in a pipe line in which it is desired to automati
cally maintain a regulated, predetermined line
pressure, with a minimum of wear and servicing
of the valves.
'
It has been found that, in pressure regulated
pipe lines of fairly large capacity, excessive and
undesirable wear occurs on the packing and seat 10
of the pressure regulating valve due to the fre
~ quent opening and closing of said valve to meet
relatively smal1 demands. As a result of such
wear, the valve leaks slightly, accurate regulation
is unobtainable, and frequent servicing of the 15
valve becomes necessary.
'
'
The present invention overcomes the above dif
ficulties by providing an auxiliary or by-pass
valve of small capacity for by-passing ?uid
pacity.
'
In some instances, both the ‘main and by-pass
valves may have the same capacity, as when one
of the valves is installed as a stand-by for emer
gency use. In that event, one of the valves will
handle all demands and the other valve will func_
tion only in the event that said one valve fails .
to open.
‘
v
The principal object of the invention is to pro
vide automatic fluid flow control apparatus; for ‘
use in water pipe lines and the like, in which
valve wearand servicing is reduced to a mini
mum.
Another object of the invention is to provide
control means for a plurality of valves, which
will cause said valves to open and close in di?er
ent predetermined sequences.
.
A further object of the invention is to provide,
around a pressure regulating or main valve of 20 in a supply line, a pair of valves of di?erent ca
relatively large capacity, said by-pass valve being
pacity and control means for said valves arranged
arranged to operate in accordance with pressure
variations in the outlet opening of the main valve
so that one of the valves can ‘by-pass ?uid around
the other to take care of small demands without
and to be controlled in its operation by a com
requiring said other valve to open.
bined pressure responsive device and pilot valve 25
A still further object of the invention is to
provide, in a pipe line, a pair of valves and con
trol means for the valves arranged so that one
of said valves will handle all of the flow through
the pipe line with which said valves are associ
'
which simultaneously controls both the pressure
regulating valve and the by-pass valve. The con
trol means is such that when a small demand
occurs, only the by-pass valve opens and its ex
tent of opening will varyvwith the small demand, 30 ated, and the other of said valves will be oper
ated only as an emergency valve in the event that
but in the event that a greatly increased demand
the ?rst-mentioned valve fails to operate.
_
occurs, then the main valve will also open. The
Other objects and advantages of the invention
control means is still further arranged so that v
will be apparent from the following description,
both valves can open simultaneously in response
35 taken in conjunction with the .accompanying
to a sudden great demand.
drawings, in which:
>
The'control means for the main and by-pass
Figure 1 is a view partly in section of a large
valves is also such that the pressure regulator
capacity main valve and a relatively small ca
and by-pass valves operate in a predetermined
pacity auxiliary or by-pass valve and automatic
sequence, both during opening and closing. Thus,
when there is a demand on the outlet side of the 40 control means for controlling the opening and
closing of both of said valves in a desired se
main or pressure regulator valve, the by-pass
quence;
valve will open ?rst to meet such demand. How;
Figure 2 is an enlarged sectional elevational
ever, if the by-pass valve cannot supply the de
mand when fully opened. the main valve will 45 view of the valve control means, taken on the
line 2--2 of Figure 1;
then open. As the demand. diminishes, the con~
Figure 3 is a sectional elevational view of the
trol means will ?rst cause the main valve to com
valve control means taken on the line 3-3 of
pletely' close, permitting the by-pass valve to han
dle any relatively small remaining demand, and
then effect the complete closing of the by-pass
Figure 2;
Figure 4 is a fragmentary plan view of the
valve control means taken on the line 4—4 of
valve when the demand‘ ceases. It will be clear,
therefore, that the by-pass valve opens before
the main valve, and the main valve closes before
Figure 3;
the by-pass valve.
pilot valve.
The control means of the present invention is 55
_
Figure 5 is a plan view or the pilot disc of. the
_
Figure 6 is an enlarged transverse sectional
2,410,876
‘ 3
view through the pilot disc taken on the line
6--B of Figure 5;
Figure 7 is an enlarged, inverted view of the
pilot disc;
'
Figure 8 is a plan view of the pilot disc seat;
Figure 9 is a plan view of the gasket which is
normally disposed below the pilot seat;
Figure 10 is a plan view of the fluid distribut
ing base of the pilot valve;
Figure 11 is a sectional view showing the re
4
ceive a bushing I8 for the upper end iii of the
valve stem l4. The bushing I8 is arranged so
that it‘ is in axial alignment with the plug | I and
serves as a guide for the upper end of the valve
stem M. The valve stem H has a threaded por
tion 20 intermediate the ends thereof adapted to
receive nuts 2| for clamping followers 22 and 23
in position upon opposite sides of the diaphragm
D and for retaining an annular sealing ring 24
10 in position in the follower 23 by means of a’
clamping member 25.‘
The boss it of the cover member C has a pas
sageway 26, which serves as a housing for the
upper end I9 of the valve stem l4 and is closed
by
a plug 21. The cover C is also provided with
15
' passageways in said pilot-disc is e?ected by the
a cavity 29 adapted to receive operating, ?uid
port in the pilot disc seat;
under pressure for actuating the diaphragm D.
Figures 12 to 15, inclusive, are diagrammatic
The cover C is still further provided with a pas
views showing various relative positions of the
sageway 30 establishing free communication be
passageways -in the pilot disc and the ports in the
pilot disc seat during the complete cycle of oper 20 tween the diaphragm pressure chamber 29 and
the passageway 26 in the boss l6 surrounding
ation of the main and by-pass valves, the size of
the upper end IQ of the valve stem I4. This
said ports being exaggerated to facilitate illus
arrangement precludes possible entrapment of
tration. More speci?cally, Figure 12 illustrates
?uid in the boss |6 which otherwise might inter
the position of the passageways in the pilot disc
relative to the ports in the pilot seat when both 25 fere with the upward movement of the valve stem
I4, Fluid under pressure may be admitted into
the main and by-pass valves are wide open; Fig
and exhausted from the diaphragm chamber 29
ure 13 is a view similar to‘ Figure 12 but showing
lationship between the passageways in the pilot
disc controlling the by-pass valve and a cooper
ating port in the pilot disc seat, whereby under
certain conditions communication between said
the relative position of the passageways and ports
by means of a passageway 3| in a boss 32 formed
upon the cover member C, the lower end of the
when the main valve ‘is fully closed and the by
pass valve is still wide open; Figure 14 illustrates 30 passageway 3|, of ‘course, communicating with
the chamber 29. A pipe nipple or conduit 33 is
the relative position of the passageways and ports
threaded into the upper end of the boss 32 and
when the main valve is fully closed and the by
serves as a mounting means for the pilot valve P.
pass valve is gradually closing; Figure 15 illus
The .pilot valve P (Fig. 2) includes a housing
trates the relative positionof the passageways
40 which is secured to a combined ?uid distribut
and ports when the main valve and by-pass valve
are fully closed; and
Figure 16 illustrates a modi?cation of the in
ing base and adapter member 4| by machine
screws 42, a gasket 43 being interposed between
said housing and adapter to prevent leakage.
vention in which the main and by-pass valves are
The base member 4| has a hollow depending
of the same capacity and wherein one of the
valves serves merely as an emergency valve to op 40 boss 44 threaded to receive the upper end of the
pipe nipple 33.
'
erate in the event that the other valve fails to
The pilot valve housing 40 contains a pilot disc
open.
Referring to Fig. 1_ of the drawings, the main
valve is generally indicated by the letter M, the
auxiliary or by-pass valve by the letter A, the
pilot valve by the letter P, and the pressure re
sponsive means for actuating said pilot valve by
the letter X.
,
-
chamber 46 which is continually subjected to
the pressure of the ?uid in the inlet chamber 5
of the main valve, the ?uid being conducted from
said inlet chamber through a section of conduit
41 arranged externally of the main valve I, one
end 48 of said conduit being suitably connected
with the valve body B and the opposite end of
Themain valve M is connected in a pipe line Z
and includes a, body B, a cover C, and a circular 50 said conduit being connected by a conventional
?tting'49 with the base member 4 I, said base mem
diaphragm D whose marginal portion is clamped
ber having a channel 50 for delivering ?uid to a
between said body and cover by a suitable num
passageway 5| in the gasket 43 and a. passage
ber of cap screws |. The body B is provided with
way 5l“ in the pilot valve housing 40. A strainer
a substantially vertical partition wall 3 which co
operates with an inclined wall portion 4 to provide 65 52 is so arranged in the housing 40 that all liquid
introduced through the passageway 5|a must
inlet and outlet chambers or openings 5 and 6,
pass through said strainer before it can. enter
respectively, in said body. The wall portions 3
the pilot disc chamber 46. The strainer 52 pre
and 4 are merged to provide a circular opening ‘I
vents the entrance of foreign matter into the
which is threaded and adapted to receive an an
nular valve seat 8. The valve seat 8 is provided 60 pilot valve with the operating ?uid and thus as
sures trouble-free operation and non-clogging
with a circular opening 9 through which water
of
the pilot valve.
or other liquid can pass in travelling from the
The pressure ?uid or pilot disc chamber 46 is
inlet chamber 5 to the outlet chamber 6.
formed at the lower end of the pilot valve hous
The valve body B has a threaded opening I0
axially aligned with the opening 9 in the valve 65 ing 40, and the open end of said chamber is closed
by a circular plate 53 serving as a seat for a
seat 8. An elongated plug II is threaded into
rotatable pilot disc 54. The seat 53 may be se
the opening I0 and includes a tubular guide por- ‘
cured to the housing 40 in any conventional man
tion l2 for the lower end l3 of a valve stem | 4.
ner,
as by screws 53*‘, and is provided with a cen
Ports l5 extend through the guide portion l2 and
connect the interior. thereof with the inlet cham 70 tral or axial port 55 (Fig. 8) and with ports 56,
' 51 and 58 spaced a predetermined radial distance '
ber 5, whereby resistance to downward move
from the port 55 and arranged upon radii 120°
ment of the valve stem M by ?uid within the
The cover member C is provided with a cen
apart. The gasket 43, of course, is provided with
suitable openings 558 to 58‘1 (Fig. 9) which reg
tral boss portion l6 suitably counterbored to re
75 ister with the ports 55 to 58, respectively. The
guide I2 is precluded.
2,410,876
base member 91 (Fig. 10) is provided with an
‘of this arrangement will be more fully explained
axial passageway 55h which communicates with.
hereinafter.
the port 55 in the pilot disc seat 53 and with
It will be observed that the through-passage
passageways 5th to 5i!h which register with the
ways 56° and 51°, and the exhaust passageways ‘l0
ports 55 to 58, respectively, of said seat.
6 and ‘H in the pilot disc 54 are in duplicate to
The passageways 56b and 51b in the base mem
cooperate with the dualpassageways 55b and 51b
ber 4i both communicate at their lower ends in
in the base member 41. The object of the dual
an enlarged central passage 55° in the boss 44
passageways is to facilitate the opening ‘and clos
into which the pipe nipple 33 is threaded (see
ing operations of the main valve M. It will be
Fig. 3) , so that both the passageways 56b and 51" 10 understood, however, that one group of these pas
communicate with the diaphragm chamber‘ 29 of
sageways may be omitted without effecting the
the main valve and provide dual passage means
operativeness of the invention. It will also be
for rapidly admitting and exhausting fluid from
noted that the passageways 56B, 51¢, 10 and 1|
said chamber. The axial passageway 55b in the
constitute one set of passageways for controlling
base 51 communicates with a radial passageway 15 the main valve M, and that the passageways 586
55‘! having a pipe ?tting 80 mounted in the outer
and 12 constitute another set of passageways for
end thereof and connected with one end of a . controlling the by-pass valve A, both of said sets
drain tube 9!, the other end of said drain tube
of passageways being formed in the single pilot
_ being preferably suitably connected at 62 with
disc 55.
the outlet opening 6 of the main valve M.
'20 The pilot disc 54 is further provided with a pair
The passageway 58” of the base member 4| com
of apertures 14 adapted to receive pins 15 (Fig. 3)
municates with a radial passageway 58° having a
depending from a drive washer 16 mounted upon
pipe ?tting 63 mounted in the outer end thereof..
one end of a vertical pilot shaft 11. The shaft
The ?tting 53 is connected to one end of a tube
11 extends through an opening 18 in the housing
99, the opposite end of which communicates 25 40 and is surrounded by an adjustable packing
through a ?tting 85 (Fig. 1) with the diaphragm
gland ‘19, the lower end of which engages a wash
chamber 29“ of the auxiliary or by-pass valve A.
er 80 to compress a body of packing 81 into seal
Incidentally, the by-pass valve A may be of iden
ing engagement with said shaft to prevent the
ticaily the same general construction as the main
escape of operating ?uid under pressure from thev
valve M, and corresponding parts will therefore 30 pilot disc chamber 45. A spring 82 surrounds
be given the same numbers as those of the main
the shaft 11 and is interposed between the drive
valve but with the letter “a” used as a prime.
washer 15 and the top of the pilot disc 54. The
- Thus, it will be noted that the inlet chamber 5‘3 .
purpose of the spring 82 is to urge the drive
of the by-pass valve A is connected with the inlet
washer downwardly to hold the pilot disc 54
chamber 5 of the main valve M by a section of 35 against the seat 53 in order to avoid inadvertent
pipe 55 and that the outlet opening 6‘3 or said by
movement of said pilot disc away from said seat.
pass valve is connected by a second section of
The spring 82 ordinarily is not essential inas
pipe 61 with the outlet-opening 6 of the main
much as the pressure of the operating ?uid in
valve.
the chamber 46 tends to maintain the pilot disc
As is‘ best shown in Figs. 5 to '7, the pilot disc 54 40 tight against its seat. However, in the event of
is provided with two pressure or through-pas
sageways 56e and 518 which are adapted to si
low pressure or pressure failure the spring 58
will keep the pilot disc 54 seated so that no
multaneously register with the ports 55 and 51 in
foreign matter, if it should happen to be present,
the pilot disc seat 53 and a relatively small pres
can get between it and the seat 53.
sure or through-passageway 58° adapted to reg
As has been previously indicated, the pilot
ister with the port 58 in said pilot disc seat. The
valve P is operable by a, pressure-responsive ‘de
passageways 55e and 51e control the admission of
vice X. The rotation of the pilot disc 54, accord
operating ?uid under pressure into the dia
ingly, is controlled by a diaphragm operated
phragm chamber 29 of the main valve M and the
mechanism which will now be described.
passageway 58e controls the admission of operat 50 Referring to Figs. 2 to 4, the mechanism X
ing ?uid to the pressure chamber 29“ of the by
includes a casing 89 provided with a chamber 90,
pass valve A. The pilot disc 54 is also provided
and a cover plate 9| which forms a closure -for
with three U-shaped exhaust passageways 10, 1|
said chamber. The cover plate 9| is secured to
the casing 89 by a plurality of screws 92. As' is
best shown in Fig. 3, the casing 89 is mounted
upon the pilot valve housing 49 by means of ma
chine screws 93, the heads of which are received
and 12 which terminate at one end in ‘a common
axially extending leg portion 55° which is in con
stant registration with the port 55 in the seat 53.
The U-shaped exhaust passageway 19 has an
outer leg portion 561 adapted to register with the
in the chamber 90. A sleeve 94 extends through port 56 in the seat 53 and the U-shaped exhaust
a bushing 95 mounted in the bottom wall of the
passageway 11 has an outer leg portion 511 adapt 60 casing 89 and is recessed as indicated at 96 to
receive the upper end of the pilot shaft 11. A ,
ed to register with the port 51, to effect exhaust
of operating ?uid from the diaphragm chamber
pin 91 serves to connect the sleeve 94 and the
29 of the main valve M. Similarly, the U-shaped - shaft 11 in relative non-rotatable relation. The
sleeve 94 has an upper extremity 98 received in a
exhaust passageway 12 has an outer leg 581 adapt
ed to register with the port 58 in the seat 53, 65 bushing 99 in the cover plate 92. The sleeve 94
is further provided with an intermediate portion
which communicates with the diaphragm cham
which is at least partially threaded as indicated
ber 29' of the by-pass valve A, whereby to exhaust
at Hill. A gear I0! is received upon said inter
spent operating ?uid from said by-pass valve.
mediate portion'and is clamped in non-rotatable
The leg 58h however, is provided with a notched 70 relation to the sleeve 94 by a nut I02 cooperating
portion 19 extending in a clockwise ‘direction (Fig.
with the threaded portion 100. The gear “II is
5) from the leg 58‘ toward the passageway 58*. adapted to be rotated through an angle of 60°
The ‘notch 13 terminates from the passageway 58°;
by a reciprocable rod I03 provided with annular
a distance Y, less than the diameter of the port 58
ridges I04, which convert a portion of said rod
in the seat 53. as shown in Fig. 11. The purpose 15 into a rack to effect turning movement 01' the
2,410,876
‘7
the passageways in the pilot disc 54 to effect
opening and closing of the main valve M. Thus,
when the U-shaped exhaust passageways _'I0 and
‘II of the pilot disc 54 are in registration with
the ports 56 and 51 of the seat 53, as diagram
matically shown in Fig. 12, the valves A and M
are both open and spent operating ?uid will
have ?owed from the, diaphragm chamber 29
gear IOI. Turning of the gear IOI necessarily
causes rotation of the sleeve 84 and the pilot disc
shaft 11.
,
The rod I03 is disposed at right angles to the
sleeve 94 and is slidably mounted in bushings
I05 secured in opposed side walls of the casing
89, as best shown in Fig. 2. One end of the
rod I03 is reduced and threaded as indicated at
I06 and carries a circular plate I01 which en
of the main valve M through the passageway
The diaphragm I08 is marginally secured be
enlarged passageway 55° and the passageways
gages one side of a ?exible pilot diaphragm I08. 10 3I in the boss 32, through the conduit 33, the
56b and 51b communicating therewith in the base
member 4|, through the passageways 58° and
5‘!a in the gasket 43, the ports 55 and 51 in the
plate III, the cover plate ‘I II and the casing 89'
being secured together by a suitable number of 15 pilot disc 53, then through the exhaust passage
tween a ?ange I09 formed integral with the
casing 89 and a ?ange IIO formed upon a cover
ways 'I0 and 'II in the pilot disc 54 and into the
axial passageway 55° of said pilot disc, the axial
port 55 in the pilot seat 53, the axial passageway
ternally threaded annular ?ange II3 adapted
555 in the gasket 43, through the axial passage
to receive one end of a pipe nipple H4. The
opposite end of the pipe nipple H4 is received 20 way 55b and the radial passageway 554 in the base
4|, thence into ?tting 00, drain tube BI and ii
in an internally threaded cap member II5. A
nally into the outlet opening 6 of the main valve.
helical compression spring H6 is disposed with
The U-shaped exhaust passageway 12 in the
in the pipe nipple I I4 and one end of said spring
pilot disc 54 simultaneously registers with the
'rests against a washer I" mounted upon a
shouldered end II8 of the rod I03. The oppo 25 port 58 in the pilot seat 53 so that spent oper
ating ?uid from the by-pass valve A will have
site end of the spring IIB engages a washer H8
screws H2.
The casing 89 is also provided with an in
been exhausted from the diaphragm chamber
abutting against the extremity of an adjust
29"- of ‘said valve through the ?tting 65, tube
ing bolt I20 threadedly mounted in the cap H5.
64 and ?tting 63 into the radial passageway 58°
The bolt I20 is adapted to be'adjusted to vary
the compression of the spring II6 to regulate 30 and the vertical passage 58b in the base mem
ber M, then through passageway 58“ in the
the pressure at which the valves A and M will
gasket 43, port 58 in the pilot seat 53, through
operate under the control of the pilot valve P.’
the U-shaped exhaust passageway 12 and then
The bolt I20 can be locked in any desired posi
into the axial exhaust port 55 of the pilot seat
tion of adjustment by a lock nut I2I arranged to
be jammed against the cap H5. The action of 35 to be ?nally discharged through the drain tube
GI in the same manner and along with the ex
the spring H8 is to urge ‘the rod I03 toward the
haust ?uid from the main valve.
Assuming now that the demand in the line
Z decreases, the pressure in the outlet chamber
valves A and M in a sequence to be described
40 or opening 6 of the main valve M will gradually
hereinafter.
build up and be communicated through the con
The cover plate III is shaped so as to provide
duit I25 to the compartment I22 to increase the
a compartment I22 at one side of the pilot dia
pressure therein su?‘icient to ?ex the pilot dia
phragm I08 adapted to receive operating ?uid
left, as viewed in Fig. 2, to cause clockwise rota
tion of the pilot disc 54 to effect opening of the
phragm I08 toward the right against the re
phragm and shifting of the rod I03 toward the 45 sistance offered by the pressure regulating spring
II6. As the pilot diaphragm I08 is thus ?exed,
right .to turn the pilot disc 54 counter-clockwise
the rod I03 will be shifted toward the right,
to eiiect closing of the valves A andM in a pre
causing counter-clockwise rotation 01 the pilot ,
determined sequence described hereinafter.
disc 54. When the demand in the line Z is such
The adjustment of the spring I I5 determines the
. under pressure to effect ?exing of said dia
pressure that must be attained in the pilot dia
phragm chamber I22 to overcome the force of ,
that‘ the main valve need not be open to meet
60 it, the pilot disc 54 will have been rotated to
said spring before shifting of the rod I03 toward
the right can take place.
The movement of the rod I03 toward the left
by the spring III; is limited by the engagement ‘55
of the washer II'I (Fig. 2) with the wallsurface
I23 of the casing 89, and the movement of said
rod toward the right by ?uid pressure on the
diaphragm I08 is limited by the engagement of
the plate I0'I with the wall surface I 24. Thus, 60
the stroke of the rod I03 in both directions is
de?nitely limited so that the pilot disc 54 is
turned through exactly the right angle (60")
necessary to position the passageways of said
pilot disc in cooperating relation with the portsv 65
the position diagrammatically shown in Fig. 13,
wherein the through-passageways 56° and 51°
are shown in registration with the ports 55 and
51 in the pilot seat 53 so that operating ?uid
then passes from the pressure chamber 46 into
the diaphragm chamber 29 of the main valve
M effecting closing of said main valve. The
through-passage 58° in the pilot disc 54 also
registers with'the port 58 in the pilot seat 53 so
that ?uid under pressure would also ?ow to the
diaphragm chamber 29“ of the auxiliary or by
pass valve A except for the fact that the notched
portion ‘I3 of the exhaust passageway 12 over
laps the port 58 to such extent as to bleed of!
operating ?uid faster than it is being supplied
through the passageway 58°. Hence, complete
closing of said by-pass valve A does not occur
under these conditions, but some modulation to
'suit the demand may occur in accordance with
in the pilot disc seat 53.
The ?uid under pressure for actuating the
.pilot diaphragm I08 is taken from the outlet
opening 5 of the main valve M and is conducted
from said opening by a small pipe I25 having 70
_ the pressure acting upon the diaphragm I08. By
one end connected to said main valve at I28 and
virtue of this arrangement, the main valve M
its other end connected to a ?tting I2‘I mounted
will be fully closed before the by-pass valve A
in the cover plate III.
starts to close. However, as the demand fur
The ports 56 and 51 in the seat 53, as has been
previously indicated, cooperate in parallel with 76 ther decreases and the pressure in the chamber
2,410,876
9
I 22 increases, the pilot disc it will be further
rotated counter~clockwise to the position shown
in Fig. 14, wherefrom it will be seen that the
notched portion ‘I3. has been moved out of regis
tration with the port 58, seepage into the vex
haust passage ‘I2 no longer can occur,» and all
of the ?uid passing through the‘ passageway 50°
passes through the port 58 to the diaphragm
chamber 29“ to effect closing of the by-pass
valve A. Of course, the main valve M is held
closedv by the registration of the pilot disc pas
sageways 56° and 51° with the seat ports 56 and v
51. Further decrease in demand with corre-'
10
close'to meet all demands, inasmuch as it is dis
posed directly in the line of flow through the‘
principal pipe line Z’. Accordingly, the valve A‘
is associated with the control P'-X’ so that it
serves asa true stand-by or emergency valve. To
this end, the pilot valve P’ and the pressure re
sponsive device X are preferably mounted upon
the by-pass valve A’ and arranged so that the
valve M’ will open ?rst. However, in the event,
that the valve M’ fails to open for any reason, '
. then the,control device X’ will ‘respond to- the
pressure drop on the outlet side of the valve M’
and actuate the pilot P’ in the same manner pre
sponding increase in pressure in the outlet open
viously described, to e?ect opening of the by-pass
ing't of the main valve will eventually move 15 valve A’.
the rod 03 to the end. of its stroke and the pilot
While the control means P’-X’ is mounted
disc 54 will take the position shown in Fig. 15
upon the by-pass valve A’, operating ?uid for the
and maintain the valves A and M closed.
pilot valve P’ is taken from the inlet side of the
Assume, further, that a demand occurs in the
valve M’ through a conduit 41,’, and exhaust ?uid
line Z, the pressure will drop in the outlet open 20 from the pilot valve is drained back into the out
ing. 6 of the main, valve M and a corresponding
let side of the valve M’ through a drain tube GI ’.
pressure drop will occur in the compartment I22
Similarly, the pressure responsive device X’ is
associated with the pilot diaphragm I08. As the
connected with the outlet side of the main valve
pressure drops in the compartment I22, the
by a conduit I25’. In order that the valve M’
spring Ht forces the ‘rod I08 toward the left, im 25 will be opened first, the conduit 64' is connected
parting clockwise rotation to the pilot disc .54.
with the diaphragm chamber of the valve‘ M’.
When the pilot disc is rotated to a position with
It will \be understood, of course, that the se
respect to its seat, such as illustrated in Fig. 13, it
quence of operation of the valves M’ and A’ will
will beapparent that the notched portion ‘I3 voi.’
be such that the valve A’ normally will not open,
the pilot disc 50 and ‘the passage 58°‘again com 30 but in the event of an emergency will open after.
municate simultaneously with the port 58 in the
the valve M’ should have fully opened, and will
pilot seat so that operating ?uid from the di
close before the valve M’ would normally close.
aphragm chamber 293 inrthe by-pass valve A
.Thus, the same sequence‘ of operation of main
begins to escape and said by-pass valve starts
and by-pass valve is maintained in the arrange¢
to open. ,As the demand becomes greater the 35 merit shown in Fig. 16 as in the arrangement in
notched portion ‘I3 moves further into registra
Fig. 1.
v
'
tion with the port 50 with the result that the
It will be apparent from the foregoing that the
valve A opens fully. V Such full opening occurs
present invention provides means whereby slight
before the exhaust passageways ‘I0 and ‘II reg
variations in demand in a water supply line, for
ister with the ports 56 and 51. In other words 40 example, will .not necessitate the frequent open
before the main valve M starts ‘to open. As the
ing and closing of a large or main valve with its
demand becomes still greater, the pressure in the
accompanying wear on‘ the seat and packing.
compartment I22 becomes lower and the pilot >
It will also be apparent that the control means
valve disc 34 will be further actuated clockwise
of the present invention is equally applicable to
until the exhaust ‘passages ‘I0 and ii in said 45 I aepair of valvesof the same capacity and when
pilot disc register with the ports 56 and 51, at
so' used will cause the by-pass valve to automat
, which time the main valve M will start to open
ically function as a stand-by or emergency valve.
to supplement the flow through the by-pass valve
It will be understood that variouschanges in
A. Closing of the valves M and A takes place‘ ' ~ construction may be made in both the main pres
with decrease in demand as previously explained. 60 sure regulator valve and the by-pass valve and
It will thus be seen that the main valve M and
the by-pass valve A open in a given predeter- .
- mined sequence and .that said valves close in a
different predetermined sequence.
In other
words,‘ the by-pass. valve A opens before the
in themeans for ‘controlling the same in the se
quence disclosed ‘herein without departing from
the spirit of the invention or the scope of the
annexed
claims.
.
'
.
-I claim:
main valve M and the main valve M closes be
1. A ?uid flow control apparatus including a
fore the by-pass valve A. However, it will be ap- _ ' pair of valves; one of which is arranged to by
parent that both valves can opensimultaneously
pass ?uid" around the other; pilot valve means
in response to a sudden large demand.
for simultaneously controlling the opening and
Figure 16 diagrammatically illustrates valves 60 closing of said valves, said pilot valve means in
M’ and A’ of the same capacity controlled, by a
cluding a ported pilot‘ element provided with two
pilot valve and pressure- responsive means P'-'-X'. ‘ sets of passageways, one set for controlling each
similar to that shown in Figs. 1 to 4. When
of “said valves,’ the passageways of one set being
valves of the same size are used, it is not feasible
arranged to provide a delayed closing action \for
to mount one upon the other or to directly ccn-' 65 one of said valves, whereby one valve will always
nect their inlet and outlet openings by piping, as
be closed later than, and opened prior to, the
in Fig. 1. Instead, T-?ttings I30 and I3I may be
other of said valves.
.
connected with the inlet and outlet ends, respec
2. Fluid flow control apparatus comprising: a
tively, of the valve M'.‘ An elbow I32 may serve
pair of pressure ?uid operable valves; means con
to connect the stem of the T-?tting I30 with the 70 necting one of said valves in by-passing relation
inlet side of the by~pass valve A' and a second
to the other: pressure responsive means opera
elbow I33 to ‘connect the stem of the T-?tting
tively connected with the outlet side of one of
I3I with the outlet side of said by-pass valve.
said valves and being. operable in accordance with
With the valve arrangement shown in Fig. 16,
changes in pressure on said outlet side; and pilot
it is preferable to have the valve M’ open and 75 valve means for controlling the exhaust and sup
2,410,876 '
‘ effect opening and closing of said main and aux
iliary valves, said pilot valve being arranged to
effect opening of said auxiliary valve prior to
opening of said main valve and to effect closing
means for controlling the opening and closing of
said valves in predetermined order.
12
from and to said main and auxiliary valves to
ply of operating ?uid from and to said pair on
valves actuated by said pressure responsive
_
3. Fluid ?ow control apparatus comprising: a
pressure ?uid operable valve of large capacity;
a pressure ?uid. operable valve of relatively small
capacity; means connecting said second men
of said main valve prior‘to closing of said‘ aux- r
iliary valve.
'7. Fluid ?ow control apparatus comprising: a
‘ main pressure regulating valve having inlet and
outlet openings, a closure member, and a dia
tioned valve in by-passing relation with said ?rst
mentioned valve; and control means in the form 10
of a combined pilot valve and pressure responsive
device operable in accordance with pressure
changes in said ?rst-mentioned valve for simul
taneously controlling the exhaust and supply of
operating ?uid from and to both of_ said valves, is
said control means being arranged to" effect open
ingot said valve of small capacity prior to open-_
ing of said valve of large capacity and to e?ect
closing of said valve of large capacity prior to
20
closing of said valve of small capacity.
4. Fluid ?ow control apparatus comprising: a
v ?uid pressure operable main, pressure regulating
valve having inlet and outlet openings and‘ clo
sure means actuated toward closed position by
phragm connected with said closure member for
controlling the ?ow between said openings; an
auxiliaryvalve having inlet and outlet openings,
a closure member, and a diaphragm connected
with said closure member for controlling the flow
between said openings; a pipe interconnecting
the inlet openings of said main and auxiliary
valves; a second pipeiinterconnecting the outlet
openings of said main and auxiliary valves; and
a pilot valve responsive to pressure changes in
the outlet opening of said main pressure regu
lating valve for controlling the opening and clos
ing of said main and auxiliary valves in accord
ance with pressure variations in said outlet open
operating ?uid under pressure controlling the 25 ing, said pilot valve being arranged to exhaust . '
?ow between said openings; a relatively small
?uid pressure operable auxiliary valve having in
let and outlet openings and closure means actu
ated toward closed position by operating ?uid
under pressure for controlling the ?ow between
said openings; means exteriorly of said valves in
terconnecting the inlet openings of said main
and auxiliary valves; means exteriorly of said
valves interconnecting the outlet openings of said
main and auxiliary valves; and control means
responsive to pressure changes in the outlet open
ing of said main pressure regulating valve for
effecting the opening of said auxiliary valve prior
to the opening of said main valve and for. e?ect
ing closing of said valves in the reverse order.
5. Fluid ?ow control apparatus comprising: a
?uid pressure operable main valve having inlet
‘and outlet openings and closure means actuated
toward closed position by operating ?uid under
pressure controlling the ?ow between said open
ings'; a relatively small ?uid pressure operable
by-pass valve having inlet and outlet openings
and closure means actuated toward closed posi
tion ‘by operating ?uid under pressure for con
trolling the ?ow between said last-named open
ings; a pipe interconnecting the inlet openings
of said main and by-pass valves; a second pipe
interconnecting the outlet openings or said main
and by-pass valves; and control means responsive
to the pressure in one of said openings of said
main valve for effecting the opening and closing
operating ?uid from the diaphragm chamber of
said auxiliary valve prior to exhausting operat
ing ?uid from the diaphragm chamber of said
, main valve whereby to effect opening of said aux
30 iliary valve prior to opening of said main valve.
8. Fluid ?ow control apparatus comprising: a
main pressure regulating valve having inlet and
outlet openings, a closure member, and a dia
phragm connected with said closure member for
35 controlling the ?ow between said openings; 9. by
pass line operatively associated with said main
valve: a by-pass valve connected in said line hav
ing inlet and outlet openings, a closure member,
and a diaphragm connected with said closure
40 -member for controlling the ?ow between said
openings; and a pilot valve responsive to pres- .
sure changes in the outlet opening or said main
pressure regulating valve for controlling the
opening and closing of said main and by-pass
valves in accordance with pressure variations in,
45 said outlet opening, said pilot valve including a
ported element arranged to ‘exhaust operating
?uid from the diaphragm chamber of said by
pass valve prior to exhausting operating ?uid
50 from the diaphragm chamber of said main valve,
whereby to effect opening of said by-pass valve
prior to opening of said main valve, and toadmit
operating ?uid under pressure into the dia
phragm chamber of said main valve to eiIect
55 closing of said main valve prior to admitting
operating ?uid into the diaphragm chamber of
said by-pass valve, whereby to effect closing of
of said main and by-pass valves, said control
said main valve prior to closing of said by-pass
means being arranged to effect opening of said
valve.
.
by-pass valve prior to opening of said main~ valve
9. A ?uid ?ow control apparatus including a
and to e?ect closing of said main valve prior to 60 pair
of pressure ?uid operable valves, one of which
closing of said by-pass valve.v
is
arranged
‘to by-pass ?uid around the other:
6. Fluid ?ow control ‘apparatus comprising: a .
pilot valve means for simultaneously controlling
hydraulically operable main pressure regulating
valve having inlet and outlet openings‘and a I the opening and closing of said valves, said pilot
closure member controllingv the ?ow between said 65 valve means including a housing having a cham
ber adapted to contain operating ?uid under pres
openings; a hydraulically operable auxiliary
sure, a rotatable pilot disc in said chamber, said
valve having inlet and outlet'openings and a
rotatable pilot disc having two sets of passage
closure member controlling the ?ow between said
ways, one set'for controlling each of said valves,
openings; a pipe interconnecting the inlet open
ings of said main and auxiliary valves; a second 7 0 each-of said sets-including a through passageway
pipe-interconnecting the outlet openings of said
and a U-shaped exhaust vpassageway, and a pilot
sponsive to pressure changes in the outlet open
disc seat cooperable with said pilot disc having
a port- adapted to continuously communicate with
‘ ing of said main pressure regulating valve con
- one of said valves and to alternately communicate
main and auxiliary valves; and a pilot valve re
trolling the exhaust and supply of operating ?uid 75 with the passageways of ‘said ?rst set of passage
2,410,876
13
ways and also having a second port adapted to
under pressure to said pilot chamber, conduit
continuously communicate with the other of said
means for conducting operating ?uid under‘pres
valves and to alternately communicate with the
sure from said pilot chamber toythe diaphragm
passageways of said second set of passageways,
chamber of said main valve, tube’m'eansdor con
said pilot disc seat also having a port simultane 5 ducting operating ?uid'under presure from said
ously communicating ‘with the exhaust passage
pilot chamber to said diaphragmfchamber of
ways of both of said sets of passageways, the .
said by-pass valve; and means to;
exhaust passageway of said second set of passage
ways including a portion extending toward its
tion of said ported pilot element, ‘
associated pressure passageway, said portion
terminating from said pressure passageway a dis
tance less than the dimension of said second port
'
' '
_7
pressure changes in the "outletiji‘ope ng of said
10
main valve.
I
'
'
-
12. Fluid flow control apparatus comprising:
.a main pressure regulating valve having inlet and '
in said pilot disc seat, whereby said pressure - outlet openings, a closure member, and a diaand exhaust passageways of said second set of
phragm connected with said closure member for
passageways can simultaneously register with 15 controlling the ?ow between said openings; a by
said second port to provide a delayed closing action
pass line operatively associated with saidmaln
of the valve controlled by said second set of pas
valve; a by-pass valve connected in said
hav
sageways.
'
ing inlet and outlet openings, a closure member,
10. Fluid ?ow control apparatus comprising: a
and a diaphragm connected with saidv closure
main pressure regulating valve having inlet and 20 member for controlling the ?ow between said
outlet openings; a closure member, and a dia- ,
openings; pilot valve means for controlling the
phragm connected with said closure member for
opening and closing of said main pressure regu
controlling the flow between said openings; a by
lating valve and said by-pass valve, said pilot
pass line operatively associated with said main
valve means including a housing'havlng a pilot
valve; a by-pass valve connected in said line 25 disc chamber and a rotatable, ported pilot disc
having inlet and outlet openings, a closure mem
in said chamber, means for supplying operating
ber, and a diaphragm connected with said closure
?uid under pressure to said pilot disc chamber,
member for controlling the flow. between said
means including a conduit for conducting oper
openings; and a pilot valve for controlling the
ating fluid under pressure from said pilot disc
opening and closing of said 'main and by-pass 30 chamber to the diaphragm chamber of said main
valves, said pilot valve including _a housing hav
valve, means including a tube forconducting op
ing a chamber for operating fluid under pressure,
erating ?uid under pressure from said pilot disc
a rotatable pilot disc in said chamber, said pilot
chamber to said diaphragm chamber of said by
disc having two sets of passageways, each of said
pass valve; and means for effecting rotation of
sets of passageways including at least one pres 35 said pilot disc in response to pressure changes in
sure passageway and one exhaust passageway.
‘one of said sets of passageways controlling the
closing and opening of said main valve and the
other of said sets of passageways controlling the
the outlet opening of said main valve.
13. Fluid ?ow control apparatus comprising a
main pressure regulating valve having inlet and
outlet openings, a closure member, and a die
closing and opening of said by-pass valve, and 40 phragm connected with said closure member for
a pilotdisc seat having a port successively regis
controlling the ?ow between said openings; a by
trable with said ?rst set of passageways and com
pass line operatively associated with said main
municating with the diaphragm chamber of said
valve; a by-pass valve connected in said line-hav
main valve, said pilot disc having a second port
ing inlet and outlet openings, a closure member,
successively registrable with the second set of % and a diaphragm connected with said closure
passageways and communicating with the dia
member for controlling the ?ow between said
phragm chamber of said by-pass valve, said pilot
openings; pilot valve means for controlling the opening and closing of said main pressure regu
disc seat also having an exhaust port in con
lating valve and said bypass valve, said pilot
tinuous communication with the exhaust passage
way of said two sets of, passageways, the exhaust 59 valve means including a housing having a pilot
passageway of said second set of passageways in
disc chamber and a rotatable, ported pilot disc
cluding a notched ‘portion extending toward its
associated pressure passageway, said notch ter
minating from said passageway a distance less
than the dimension of said second port, whereby
operating ?uid can leak through said ‘pressure
passageway into the exhaust passageway of said
second set of passageways via said second port
without effecting closing of said by-pass valve.
11. Fluid flow control apparatus comprising:
a main pressure regulating valve having inlet
and outlet openings, a closure member, and a
diaphragm connected with said closure member
for controlling the ?ow between said openings;
a by-pass line operatively associated with said
main valve; a by-pass valve connected in said
line having inlet and outlet openings, a closure
in said-chamber, a conduit for supplying operating ?uid under pressure to said pilot disc cham
ber,-means including a, conduit for conducting
55 operating ?uid under pressure from said pilot
disc chamber to the diaphragm chamber of said
main valve, means including a tube for conduct
ing operating ?uid under pressure from said pilot
disc chamber to said diaphragm chamber of said
by-pass valve; and means for effecting rotation
of said pilot disc in response to pressure changes
in the outlet-opening of said main valve includ
ing a casing carrying a pilot diaphragm and hav
ing a compartment on one side of said dia
55 phragm, a pipe establishing communication be
tween said compartment and said outlet opening
of said main valve, yieldable means on the 0p
member, and a diaphragm connected with said
posite side of said pilot diaphragm opposing the
closure member for controlling the ?ow between
pressure on the first-mentioned side of said pilot
said openings; and pilot valve means for control 70 diaphragm, and means including a reciprocable
ling the opening and closing of said main pres
rod connected with said diaphragm for convert
, sure regulating valve and said by-pass valve, said
ing reciprocating movement of said rod into ro
pilot valve means including a housing having a
tary movement of said pilot disc.
pilot chamber and a ported ‘pilot element in said
14. Fluid ?ow control apparatus comprising: a
chamber, means for supplying operating ?uid 75 pair of ?uid pressure operable valves, each of
2,410,876
said valves including disc means for shutting off '
the ?ow .therethrough and means actuated by
operating fluid under pressure for urging said
16
sure conditions at one side of the valve of large
?ow capacity controlling the opening of said
valves in a, given predetermined sequence to meet
variations in flow demand arranged so that one
valve is opened prior to said other valve to meet
small ?ow demands before said other valve is
opened to meet demands greater than the flow
capacity of said one valve and the closing of said
disc means toward seated position, one 0! said
valves having a ?ow capacity much smaller than
that of the other; means exterlorly of said valves
connecting said one valve in by-passing relation
to the other, whereby opening of said one valve
valves is effected in a reverse order 'as the flow
to allow flow around the other valve will serve
to meet a small flow demand without requiring I0 demand decreases. .
DONALD G. GRISWOLD.
the disc means of said other valve to leave ‘its
seat; and automatic means responsive to pres
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