Golden Anderson Valve 920, 920H Installation Manual

INSTALLATION, OPERATION AND

MAINTENANCE MANUAL

Figure 920

1” & 2” Compound Lever

Air Release Valves

Drawing EAR-7003

234 Clay Avenue • Mars, PA 16046 USA

Telephone [phone] • Fax [phone]

E-mail: [e-mail]

Manual Number 920-IOM 022420

INSTALLATION, OPERATION

INSTALLATION, OPERATION and

MAINTENANCE

Figure 920 Air Release Valves

INTRODUCTION

This manual will provide the information to
properly install, operate and maintain the valve
to ensure a long service life. The Air Release
Valve is ruggedly constructed to provide years of
trouble-free operation with minimal
maintenance.

These Air Release Valves are not intended for
use with fluids containing suspended solids such
as wastewater and sewage. The GA Industries
Figure 925, 927 or 929 Air Release Valves are
recommended for such applications.

CAUTION

The valve is NOT recommended for use with
toxic fluids, fuels or fluids containing hazardous
gases

CAUTION

The valve will not function if used at a pressure
higher than the maximum working pressure
indicated on the nameplate.

The Shop Order (SO) Number, Figure Number,
size and pressure rating are stamped on a
nameplate attached to the valve. Please refer to
the SO number when ordering parts.

DESCRIPTION OF OPERATION
The Air Release Valve is designed to
automatically vent air that has accumulated
within the valve. These valves are usually
installed at high points in the system where air
tends to collect. The valve as shipped is

”normally open” and will vent air through its

orifice at the top of the valve. The float rises
when water enters the valve and closes the
orifice. Air from the system accumulates in the
valve forcing the water level down until the float
drops and opens the venting orifice. As air is
released the water level rises lifting the float and
re-closing the valve.

This sequence occurs as often as necessary to
release air that has collected in the valve.

RECEIVING AND STORAGE

Inspect the valve upon receipt for damage
during shipment. Carefully unload all valves to
the ground without dropping.

The valves should remain in a clean, dry and
weather protected area until installed. For long
term storage (greater than 6 months) the rubber
surfaces of the seat should be coated with a
non-toxic lubricant such as "SuperLube" made
by Synco Chemical. Do not expose the rubber
parts to sunlight or ozone.

INSTALLATION

The Figure 920 is standard with NPT screwed
connections. An optional flange pipeline
connection is available on special order.

Consult the drawings of record to verify the
configuration supplied and installed.

The valve must be installed in an upright vertical
orientation, normally at a high point in the
system.

If installed outdoors, below ground in a vault or
in an unheated area, adequate freeze protection
must be provided. Some discharge of water
may occur during operation so the valve outlet
should be piped to an adequate drain.

An isolating valve should be installed between
the valve and the pipeline or system to facilitate
maintenance.

Carefully screw threaded end valves onto pipe
nipple using compatible thread sealant. Tighten
valve using wrench flats. DO NOT OVER­TIGHTEN.

Flat-faced flanged valves should be mated with
flat-faced flanges and full-face gaskets. If ring
gaskets are used the bolt material shall be
ASTM A307 Grade B (or equivalent). Higher
strength bolting should only be used with full­face gaskets.

Lower heavy valves over the mating flange
using slings or chains around the valve body.
Lubricate the bolts or studs and insert around
flange. Lightly tighten bolts until gaps are
eliminated. Torque bolts in an alternating
pattern in graduated steps. If leakage occurs
wait 24 hours and re-torque the bolts but do not
compress the gasket more than 50% or exceed
bolt maximum torque rating.

VALVE CONSTRUCTION

The standard Figure 920 Air Release Valve has
a cast iron body, stainless steel float and linkage
mechanism and a rubber seat. Optional
materials such as ductile iron body can be
provided for higher working pressures. Refer to
the List of Materials submitted for the order if
non-standard materials were provided.

Refer to Figure 1 for details of construction and
parts location.

The body (1) has an inlet connection at the
bottom where the valve attaches to the system
and a smaller outlet connection at the top
through which air leaves the valve.

WARNING

Removing the valve from the line or

disassembling the valve while there is pressure

in the valve body may result in injury or damage

to the valve

PREVENTIVE MAINTENANCE

Figure 920 Air Release Valves require no
scheduled lubrication, adjustment or preventive
maintenance.

A periodic visual inspection should be performed
to ensure the outlet piping is not obstructed and
to verify there is no fluid leakage.

TESTING

Valve operation can be easily tested. Close the
inlet isolation valve and remove or loosen the
pipe plug nearest the inlet to drain the water
from the valve. The float should drop as the
water leaves the valve. NOTE: A ball or gate
valve can be installed in place of the pipe plug to
facilitate testing.

Replace or tighten the pipe plug and slowly open
the inlet isolating valve. The valve should float
closed and seat tightly.

TROUBLESHOOTING

• Valve Does Not Close / Fluid Leakage
Verify debris has not collected on the seat
preventing tight closure

Verify rubber orifice button and/or orifice
seating surfaces are not damaged

Verify float has buoyancy

Verify linkage mechanism operates freely
without binding or sticking

• Valve Does Not Open
Verify debris in the valve is not
preventing the float from freely falling
when fluid is drained from valve

Verify linkage mechanism operates freely
without binding or sticking

DISASSEMBLY

While small valves may be more easily serviced
by removing it from the line, all valves can be
serviced while the body remains connected to
the pipeline. A skilled technician with proper
tools should perform all work. No special tools
are required.

First ensure there is no pressure within the
valve. Remove the cover bolts and nuts (16 &

17) and lift off cover (2) with float and linkage
attached. It may be necessary to pry the cover
off. Be careful no to damage or lose o-ring (21).

Remove the two spring pins connecting the lever
arm (5) and float arm (6) to the bracket (3). The
float and linkage will be free from the cover.

Remove the spring pin connecting the pivot link
(12) to the float arm (6) and remove the float
screw (13) and lockwasher (9). Remove the hex
nut (8) and lockwasher (9) and unscrew the
orifice button (7) from the lever arm (5).

Remove the bracket screw (4) to remove the
leverage bracket (3). Using a hex socket
remove the orifice (20) from the cover.

Inspect all parts for wear and damage. Minor
scratches and dents in the float are normal.
Some floats may contain sand for added weight
but if water is detected replace the float.
Carefully clean the orifice of scale. Replace
damaged parts.

REASSEMBLY

Clean all parts especially seating and sealing
surfaces before reassembling valve. Worn parts
should be replaced during re-assembly.

Apply Loctite© PST thread sealant to orifice (20)
and thread into cover. Torque to maximum 22
ft-lbs.

Thread orifice button (7) all the way into lever
arm (5) and install hex nut (8) and lockwasher
(9) but do not tighten. Connect the lever arm (5)
and float arm (6) to the bracket (3) using two
spring pins.

Adjust the orifice button (7) so that the end of
the lever arm (5) nearest the orifice button is
about 1/16” (1.6mm) farther from the cover than
the opposite end when the orifice button (7) is
gently resting on the orifice (20). Secure by
tightening hex nut (8)

Secure float (15) to pivot link (12) using screw
(13) and lockwasher (9). Attach pivot link (12) to
float arm (6) using spring pin. Verify free
movement of linkage mechanism and that the
orifice button (7) presses against the orifice (3)
when the float is lifted and pulls away when falls.

Lubricate and place o-ring (21) in cover (2) and
carefully place cover (2) on body (1) ensuring o­ring is retained. Install the cover bolts (16) and
nuts (17) and tighten in an alternating pattern.

Carefully introduce pressure and check for leaks

REPLACEMENT PARTS

Genuine replacement parts are available from
your local VAG/GA Industries representative or
from the factory:

VAG USA, LLC
234 Clay Avenue
Mars, PA 16046 USA
Telephone: [phone]
Fax: [phone]
E-mail: [e-mail]

Please have the nameplate data available when
ordering parts.

PARTS LIST

Item Name Material

1. Body Cast Iron

2. Cover Cast Iron

3. Bracket Stainless Steel

4. Bracket Screw Stainless Steel

5. Lever Arm Stainless Steel

6. Float Arm Stainless Steel

7. Orifice Button Stainless Steel

8. Hex Nut Stainless Steel

9. Lock Washer Stainless Steel

10. Spring Pin Stainless Steel

11. Valve Link Stainless Steel

12. Pivot Ling Stainless Steel

13. Float Screw Stainless Steel

14. Lock Washer Stainless Steel

15. Float Ball Stainless Steel

16. Cover Bolts Steel

17. Cover Nuts Steel

18. Pipe Plug Malleable Iron

19. Pipe Plug Malleable Iron

20. Orifice Button Rubber & Stainless

21. O-Ring Rubber