Cushioned Swing Check Valves - GA Industries

SWING CHECK VALVES
Bulletin W-150-C
MEETS OR EXCEEDS
ANSI AWWA C 508

SWING CHECK
VALVE. THE ONLY VALVE
THAT PROVIDES ALL
THESE FEATURES.
Large cover access port easily allowing for
maintenance and clean out
Convex
disc face
creates
increased
lifting
force, and
decreases
headloss.
Full ported
seat
opening.
The full-bodied long-radius mid section
creates maximum flow less restriction.
The body
and disc are
designed in a
special
configuration
to minimize
slam.
1
Optional metal to metal seat.
Vertical Installation Horizontal Installation
Note: Suffix “A” used after figure number for vertical
installation (i.e. 250 DA)
The Golden Advantage.
Adjustable
Weighted Arm
Adjustable
Cushion
Chamber
Suitable for Horizontal or Vertical Installation
Optional: limit
switch to send
signals, etc.
OPTIONAL: Rubber or Special Lining
OPTIONAL: Access port on bottom of body for
clean out. Available on all bodies.
Single increase Double increase
Available in increasing sizes larger than inlet.
Saves space...economical...eliminates using
an increaser. Other options adaptable.

SWING CHECK
VALVE APPLICATIONS
AND OPERATIONS
Description
The Fig.250-D is a counterweighted, rubber or metal
seated check valve with attached cushion chamber
whose function is to permit flow in only one direction,
close tightly when its discharge side pressure exceeds
its inlet pressure, and to close without a slam or bang.
Installation
The valve must be installed such that the inlet pressure
enters the valve so as to open the main valve disc. The
counterweight should be placed at the extreme end of
the counterweight arm. The counterweight arm should
be in a horizontal position. The cushion chamber
adjusting sleeve should normally be about half way out.
Operation
When the pump starts, it should be observed if the
counterweight arm moves fully open to a stop. If the
counterweight arm does not reach a full open position,
and appears to oscillate on the flow, this may encourage
premature shaft bearing wear. Before trying to correct
this by moving the counterweight inward, shut the
pump down to observe any slamming tendency. If the
valve closed quietly, the counterweight may be moved
inward slightly to see if the valve will then open fully. If
a slam is experienced, the weight must be moved
outward. The valve is full ported when about 20 degrees
open, so a 60 degree open position is not actually
necessary. The extra opening is provided to offer
minimum obstruction to high flow.
Cushion Chamber 1
A common check valve slams when its disc is caught
in a partially open position when flow reversal occurs.
So, it is essential that the counterweight closes the
valve before a reversal occurs during the pump coast
down phase. If a slam is experienced even though the
weight is at the extreme end of the counterweight arm,
additional weight may be required. The proper amount
may be determined by placing one’s hand on the
present counterweight and applying a slight force
when the pump is shut down. A few tests will indicate
the required amount of weight to be added.
The cushion chamber cannot retard the valve closure
during a flow reversal due to the tremendous forces
involved. The cushion chamber will minimize a
slamming tendency when the valve closes too quickly
due to its own counterweight action by cushioning
the last increment of movement just before the disc
contacts the seat to close the valve. An inward
adjustment of the bushing will increase this
cushioning tendency.
The below references cover the general list of materials for swing
check valves. They are subject to change to make them conform to
the specific requirements of the particular job for which they are
required. The material specifications shown above shall conform to
the most recently published standards.
MATERIALS OF CONSTRUCTION
PRINT MATERIAL ASTM or SAE
Body, Cover, Disc, Cast Iron A 126 C1.B.
Levers, Disc Arm or Cast Steel A 216 C1. WCB
Seat Stainless Steel (to 12”) A 157-C9 (STD)
Bronze (14” up) B62 (Standard)
Seat Ring Rubber 80 Dur. (Rubber)
Metal Bronze/Stainless Steel
Cover Gasket Composition Garlock 660
Hinge Shaft Stainless Steel Type 303 Commercial
Studs, Bolts, Nuts Steel Commercial
Cushion Chamber
Assembly Bronze Trim B62
Stuffing Box Packing Composition Garlock 234 or equal.
1 Applies to sizes 2” thru 36”
2

SWING CHECK
VALVES DIMENSIONS
& PARTS
Note: Flanges per ANSI B16.1
unless otherwise specified. Valve
available with flanges to DIN, ISO
BS Std. or special
1. Body
2. Body Seat
2A. Seat O-Ring
2B. Seat Pins
3. Disc & Center Pin
4. Disc Arm
5A. Renewable Seat
5B. Seat Follower
5C. Seat Screws
5D. Metal Seat Washer
6. Disc Nut
6A. Disc Nut Washer
6B. Disc Nut Pin
8. Cover Gasket
9. Cover
10. Cover Bolts
11. Shaft
12. Disc Arm Set Screws
13. Inner Bushing
14. Outer Bushing
15. Gland
16. Gland Studs
17. Gland Packing
18. Shaft Lock Pin
LIST OF PARTS
29. Disc Arm Key
20. Cushion Chamber
21. Chamber Screw
22. Plunger
23. Plunger-O-Ring
26. Adjusting Sleeve
27. Sleeve Lock Nut
28. Link
28A. Link Pin
29. Lever
29A. Lever Set Screw
29B. Lever Pin
We reserve the right to substitute parts of material which are of equal or superior quality.
VALVE
SIZE
A
B
C
D
E
Shipping
Weight
GENERAL DIMENSIONS Inches & Millimeters
3
Section showing optional valve
with metal to metal seat. Seat
and seat follower are one
piece. (Optional at extra cost,
consult factory.)
29C. Lever Cotter Pin
30. Counterweight ARM
30A. CVVT Arm Set Screws
30B. CWT Arm Key
31. Counterweight
31A. CWT Set Screw
32. Check Valve
33. Cover Plug
34. Shaft End Plate
35. End Plate Bolts
36. End Plate Seal
IN 2 21/2 3 4 6 8 10 12 14 16 18 20 24 30 36 42 48 54 60
MM 50 63 76 101 152 203 254 304 355 406 457 508 609 762 914 1066 1219 1371 1524
IN 12 12 12 13 171/2 18 23 28 33 36 40 40 48 60 63 70 76 102 114
MM 305 305 305 330 445 457 584 711 838 914 1016 1016 1219 1524 1600 1778 1930 2590 2895
IN 7 7 7 81/2 9 12 14 16 22 23 24 24 28 33 36 40 46 62 69
MM 178 178 178 216 229 305 356 406 559 584 610 610 711 838 914 1016 1168 1574 1752
IN 5 5 5 5 6 9 9 11 13 14 18 18 20 26 30 33 36 40 45
MM 127 127 127 127 153 229 229 279 330 356 438 438 508 660 762 838 914 1016 1143
IN 10 10 10 11 12 14 15 17 20 24 28 28 34 41 43 46 50 60 72
MM 254 254 254 279 305 356 381 432 508 610 711 711 864 1041 1092 1168 1270 1524 1828
IN 5 5 5 5 7 8 9 11 14 16 18 18 21 32 34 33 41 60 72
MM 127 127 127 127 178 203 229 279 356 406 457 457 533 812 863 838 1041 1524 1828
LBS 101 101 101 154 234 310 485 970 1480 1860 2400 2800 6000 8200 13500 14600 18000 20000 22000
KG 46 46 46 70 106 140 220 440 671 844 1088 1270 2720 3720 6123 6621 8164 9077 9978

MAINTENANCE,
SPECIFICATIONS AND
HEAD LOSS
Maintenance
A reversal flow through the valve when the valve is in the
closed position generally indicates a damaged or worn seat
rubber. This can usually be detected by the sound of leaking
water when the valve is closed.
Any time the main valve is dismantled, it is recommended
that the hinge shaft be polished smooth when the shaft
passes through the gland packing. Upon reassembly do
not exert excessive force on the gland screws as the
packing can produce a considerable friction on the hinge
shaft. All set screws should be checked for tightness.
Specifications
The swing check valve shall be constructed with heavy
cast iron or cast steel body with a bronze or stainless
steel seat ring, a non-corrosive shaft for attachment of
weight and lever, and complete non-corrosive trim
cushion chamber.
It shall absolutely prevent the return of water, oil or gas
back through the valve when the inlet pressure decreases
below the delivery pressure. The valve must be tight
seating, and must be cushioned in operation. The seat
ring must be renewable.
The cushion chamber shall be attached to the side of the
valve body externally and so constructed with a piston
operating in a chamber that will effectively permit the
valve to be operated without any hammering action. The
cushion chamber shall be arranged that the closing will
be adjustable to meet the service requirements.
The valve disc shall be convex and of cast iron or cast
steel and shall be suspended from a non-corrosive shaft
which will pass through a stuffing box and be connected
to the cushion chamber on the outside of the valve.
All material and workmanship shall be first class throughout
and the purchaser reserves the right to inspect this
valve before shipment.
The valve will be the GA Industries, Inc. Fig. No. 250-D (for
125# ANSI Std.) Fig. No. 250-U (for 250# ANSI Std.),
Cranberry Twp., PA
STANDARD FLANGE FIGURE NUMBERS
250-D – Cast Iron – FF & D – 125# ANSI, 250-U – Cast Iron – FF&D – 250# ANSI, 250-V – Cast Steel – FF&D – 300# ANSI, 250-W – Cast Steel –
FF&D – 400# ANSI. (For special flanges, consult the home office.)
Test performed with valve full open
We challenge any other manufacturer of check valves to prove by competitive tests a lower headloss.
4
FIG. 250-D
FULL OPEN

Double
Increasing
also available
Fig 252
Consult Factory
for Details
SINGLE-
SIZE CUSHIONED
SWING CHECK
VALVES
Fig 251-D Single Increasing
Description
The Golden Anderson increasing size cushioned
check valve has a one size larger outlet flange than
the nominal valve size. This valve is particularly
applicable for use on package sewage lift stations
where space is at a premium and reduced coupling
take valuable space.
Specifications
The increasing size check valve shall be constructed
with heavy cast iron or cast steel body with a bronze or
stainless steel seat ring, a non-corrosive shaft for
attachment of weight and lever, and complete
non-corrosive trim cushion chamber.
It shall absolutely prevent the return of waste water, oil
or gas back through the valve when the inlet pressure
decreases below the delivery pressure. The valve must
be tight seating and must operate without hammer or
shock. The seat ring must be renewable.
The cushion chamber shall be attached to the side of
the valve body externally and so constructed with a
piston operating in a chamber that will effectively permit
the valve to be operated without any hammering action.
The cushion chamber shall be so arranged that the final
increment of closing will be adjustable to meet the
service requirements.
The valve disc shall be of cast iron or cast steel and
shall be suspended from a non-corrosive shaft which
will pass through a stuffing box and be connected to
the cushion chamber on the outside of the valve.
All material and workmanship shall be first class
throughout and the purchaser reserves the right to
inspect this valve before shipment.
The valve will be the GA Industries__(size), Fig. 251-D.
5
Section showing
alternate valve with
metal to metal seat.
Seat and seat follower
are one piece.
(Optional at extra cost.
Consult factory.)
NOTE: Smaller flange size is always the inlet; larger flange
size is always the outlet. All flanges per ANSl B16.1.
For larger sizes or optional equipment such as: position
indicator, limit switch, rubber coatings, higher pressures,
special materials, special flanges, etc., consult the factory.
For materials of construction, see page 2.
For head loss, see chart page 4.
For operation and installation instructions, see page 2.
For parts list, see page 3.
GENERAL DIMENSIONS - Inches & Millimeters
VALVE IN 3 X 4 4 X 6 6 X 8 8 X 10 10 X 12
SIZE MM 76 X 101 101 X 152 152 X 203 203 X 254 254 X 304
A
IN
MM
12
305
13
330
17 1/2
445
18
457
23
584
B
IN
MM
7
178
8 1/2
216
9
229
12
305
14
356
C
IN
MM
5
127
6
153
7
177
9
229
9
229
D
IN
MM
10
254
11
279
12
305
14
356
15
381
E
IN
MM
5
127
5
127
7
178
8
203
9
229
Shipping LBS 120 175 250 350 525
Weight
KGS 54 79 113 158 238

POWER
ASSISTED SWING
CHECK VALVES
Fig. Number 250-PASC
Description
The Power Assisted Swing Check Valve is designed to
close more rapidly than can be accomplished with an
ordinary spring or weight loaded check valve. It is
especially designed for those very difficult applications
where a pump with a low WR 2 exists, a flow condition
not adequately protected by either weight loaded or
spring loaded swing check valves, particularly when
applied to larger sized valves.
The purpose of the extra fast closure on this valve is to
completely shut the valve before the forward flow of
fluid stops. Hence the reversal of flow does not strike a
partially open disc and create damaging hammer. The
Pneumatic Power Assist Unit provides adjustable closing
speed and adjustable closing force which enables this
valve to be accurately set so that the disc comes into
contact with the seat just prior to flow reversal, thus
providing cushioned operation.
Specifications
The Power Assisted Closing Swing Check Valve shall
be designed for extra fast closing so that the valve will
be completely closed before the forward flow of fluid
stops. It shall be of the Swing Check Lever and Weight
Design with the hinge shaft axis out of the waterway,
applicable for installation in a vertical upward flow or
horizontal flow position. The valve shall be 100% full
ported when open and provide droptight closure. A power
assist cylinder shall be securely attached to the valve
body to accomplish rapid, but adjustable speed of valve
closure. An independent source of fluid at ______ PSI
minimum shall be available as a power source for the
cylinder, and there shall be provided a small pressure
regulator on the power source line to regulate the uniform
pressure to the power cylinder. Also, in the power line
shall be a solenoid operated pilot which will be energized
with pump start-up and when de-energized will direct flow
from independent power source to the power cylinder to
rapidly close the valve, such function being synchronized
with pump coast down time. It shall be possible to field
adjust the closing speed of the valve.
The valve shall be constructed with cast iron body having
a securely fastened bronze seat therein (or cast steel body
with stainless steel seat). The disc shall be cast iron or
GENERAL DIMENSIONS - Inches & Millimeters
VALVE IN 16 18 20 24 30 36 42 48
SIZE MM 406 457 508 609 762 914 1066 1219
A
IN
MM
36
914
40
1016
40
1016
48
1219
60
1524
63 70
1600 1778
76
1930
B
IN
MM
41 42
1041 1066
42
1066
44
1117
51
1295
54 58
1371 1474
64
1625
C
IN
MM
14
356
18
438
18
438
20
508
26
660
30
762
33
838
36
914
D
IN
MM
26
660
30
762
30
762
32
802
36
914
42 49
1066 1244
54
1371
E
IN
MM
20
508
24
609
26
660
30
762
34
863
42 46
1066 1168
48
1219
Shipping LBS 1900 2500 2900 6100 8300 13600 14600 18000
Weight
KGS 862 1134 1316 2766 3764 6168 6621 8164
6
3 WAY SOLENOID PILOT
EXHAUST
PRESSURE REGULATOR
AIR SUPPLY INLET
cast steel, suspended from a noncorrosive shaft
passing through a stuffing box and attached to the
power cylinder outside of the valve. All material and
workmanship shall be first class and the purchaser
reserves the right to inspect the valve at the supplier’s
plant. The valve shall be flanged F&D per 125# ANSI.
The valve shall be as manufactured by GA Industries,
Inc., their Figure No. 250-PASC.
Notes: Flanges Per ANSI B16.1, unless otherwise indicated
on customer’s order. For dimensions on valves larger or
smaller than shown, consult factory. For cut-away drawing,
material specifications and parts refer to Page 2 & 3.

AT AIR FORCE GUIDED
MISSILE CENTER CAPE
KENNEDY, FLORIDA
The giant guided missiles consume huge quantities
of rocket fuel in building up sufficient ejection
pressure for take-off. The heat generated and blasted
to the launching pad is terrific, causing spalling
and disintegration of the concrete
surfaces. To minimize this
deterioration, the pads are flooded
by large jets of water under pressure
through Golden-Anderson Valves to
act as a coolant. Just prior to firing of
the rocket, there is a demand for high
quantities of cooling water for several
minutes. Upon take-off, the demand
suddenly drops to zero.
This condition creates rapid pressure
changes and surges in the feed lines.
To overcome the terrific surge in the
water lines, GA Surge Relief Valves
were installed. As soon as the
pressure exceeds a pre-determined
intensity, these GA valves automatically
open to discharge the excess. When
pressure returns to normal, the valves
automatically close.
WARRANTY GA Valves are made of the finest
available suitable materials and precaution has
been taken to assure premium quality workmanship
consistent with established quality control. Valves
or parts which are proved faulty due to defective
material or workmanship will be replaced free of
charge F.O.B. our plant upon written presentation
of such proof. This warranty shall not cover cost
of installation or any charges related thereto, and
it is valid for a period of one year from date
of shipment.
9025 MARSHALL ROAD
CRANBERRY TOWNSHIP, PA 16066-3696 USA
PHONE: (724) 776-1020 FAX: (724) 776-1254
WEB SITE: www.gaindustries.com
E-MAIL: ga@gaindustries.com
U. S. CORPS OF
ENGINEERS
Fast opening and closing is a must, and these six
16-inch Cushioned Swing Check Valves automatically
open when the pump starts forcing the water through
the lines at a peak rate of 30,000 gpm. As soon as
the pump shuts off, these large GA valves
automatically close—drop tight.
OUR GUARANTEE
We guarantee these valves to be made of first grade materials and
workmanship. Should any valve fail to operate satisfactorily from
lack of either or both of these factors, we will accept return of the
valve F.O.B. our plant and refund the purchase price. Any part of the
valve which fails due to poor quality within one year of shipment
from our plant will be replaced without charge. This is not meant to
include labor cost of installing the part in the valve.
We reserve the right to substitute materials which, in our opinion,
are of equal or superior quality, in the construction of any valve for
a particular application.
We recommended the Cushioned Swing
Check Valve for use on all pumps including
Variable Speed or Frequency Drive Pumps.
Automatically responds to varying pump output.
Closes quickly and quietly on power outage or
pump failure.
Positively protect system against backflow.
No outside power source required for operation.
Member AWWA
Member WPCF
MEMBER
Water & Wastewater Equipment
Manufacturers Association, Inc.
ESTABLISHED 1908
Agents throughout the world, to serve you. See your local directory, or contact our home office.
COMM 01/04 1500