Golden Anderson Valve 925, 925F, 925L, 925LF Installation Manual

[Type here] Manual Number 925-IOM-022420 [Type here]

INSTALLATION, OPERATION AND

MAINTENANCE MANUAL

FIGURE 925

AIR RELEASE VALVES

FOR SEWAGE & WASTEWATER

TABLE OF CONTENTS
Introduction ….………………………… 2

Description of Operation .....………… 2

Receiving & Storage .....……………… 2

Installation ......…………………………. 2

Valve Construction ......………………. 3

Start-Up ...………………………………. 3

Preventive Maintenance ....………….. 3

Trouble Shooting ...…………………… 3

Disassembly ....………………………… 3

Assembly ....……………………………. 4

Backflushing Instructions …………… 4
Order Replacement Parts …………….. 4
Figure 925 Drawing/Parts List …….…. 5
Warranty .……………………………….. 6

234 Clay Avenue • Mars, PA 16046 USA

Telephone [phone] • Fax [phone]

E-mail: [e-mail]

2

INSTALLATION, OPERATION and

MAINTENANCE

Figure 925 Sewage 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.

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 Figure 925 Air Release Valve is designed to
automatically vent air and sewage gas 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 925 is standard with 2” or 3” NPT
screwed connections. A flanged pipeline
connection is provided 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.

An isolating valve should be installed between
the valve and the pipeline or system to facilitate
maintenance (included with backflushing
attachments).

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

3

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 925 Sewage 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 Page 5 for details of construction and
parts location.

The valve 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 925 Sewage Air Release Valves require
no scheduled lubrication or adjustment.

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

Depending on the nature of the fluid, sewage air
valves may become clogged with sediment or
grease and require periodic cleaning. To
facilitate such cleaning VAG/GA Industries air

valves with an “F” at the end of the Figure

Number (e.g., 925F) were supplied with
“backflushing attachments.” Refer to the
backflushing instructions on Page 4 of this
manual for additional information.

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 manual valve
can be installed in place of the pipe plug to
facilitate testing (valves are included with
backflushing attachments).

Replace or tighten the pipe plug and slowly open
the inlet isolating valve. After expelling air, the
valve should close and seal 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.

Disassemble the valve only as far as needed to
replace damaged or worn parts.

First ensure there is no pressure within the
valve. Remove the cover bolts (16) 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 the o-ring (10).

Remove the two spring pins (13) connecting the
lever arm (11) and float arm (12) to the bracket
(3). The float and linkage will be free from the
cover.

Remove the spring pins (13) connecting the
valve links (14) to the float arm (12). Remove
the spring pin (13) from the pivot link (15) and
the hex nut (8) and lock washer (9) and unscrew
the float rod (21) from the float ball (20).

Remove the hex nut (8) and lockwasher (9) and
unscrew the orifice button (7) from the lever arm
(11).

2

4

Remove the bracket screw (5) to remove the
leverage bracket (3). Using a hex socket
remove the orifice (4) 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 (4)
and thread into cover. Torque to 22 ft-lbs
(maximum).

Install bracket (3), tighten bracket screws (5).

Thread orifice button (7) all the way into lever
arm (11) and install hex nut (8) and lockwasher
(9) but do not tighten. Connect the lever arm
(11) and float arm (12) to the bracket (3) using
two spring pins (13).

Adjust the orifice button (7) so that the end of
the lever arm (11) 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 (4). Secure by
tightening hex nut (8).

Install valve links (14) and spring pins (13) to
connect the float arm (12) to the lever arm (11).

Install lock washer (9) and float rod (21) into
float ball (20) and tighten. Install pivot link (15),
lock washer (9) and hex nut (8) on opposite end
of float rod (19) and tighten. Attach pivot link
(15) to float arm (12) using spring pin (13).

Verify free movement of linkage mechanism and
that the orifice button (7) presses against the
orifice (4) when the float rises and pulls away
when allowed to fall.

Lubricate and place o-ring (10) in cover (2) and
carefully place cover (2) on body (1) ensuring o­ring is retained. Install the cover bolts (16) and
tighten in an alternating pattern.
Carefully introduce pressure and check for
leaks.

BACKFLUSHING INSTRUCTIONS

Follow all local cross-connection and safety

codes and regulations!

To determine if a GA Industries sewage air valve
needs cleaning or backflushing:

• Close the inlet isolating valve then slowly

open the ½” flushing ball valve (if installed)
or slowly remove the pipe plug at the top
of air valve to relieve internal pressure.

• Open the 1” blow off ball valve (if installed)

or remove the pipe plug near the bottom.
Liquid should freely drain from the valve
body. If it does not, then the valve is likely
in need of cleaning or backflushing.

To clean a GA Industries sewage air release
valve equipped with backflushing attachments:

• Close the inlet isolating valve and then

slowly open the ½” flushing valve to

relieve internal pressure.

• Open the 1” blow off valve

• Connect the ½” flushing valve to a

pressurized source of clean water using
the rubber hose provided with the
backflushing attachments.

• Introduce flushing water until liquid runs

freely from the blow off valve.

• Shut off and disconnect the supply of

clean water and close the blow off and
flushing valves.

• Slowly open the inlet isolating valve. The

air release valve should exhaust air and
then close tightly

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.

5

FIGURE 925 PARTS LIST

1. Body

2. Cover

3. Leverage Bracket

4. Orifice

5. Bracket Screw

6. Lock Washer

7. Orifice Button

8. Hex Nut

9. Lock Washer

10. O-Ring

11. Lever Arm

12. Float Arm

13. Spring Pin

14. Valve Link

15. Pivot Link

16. Cover Bolt

17. ½” Pipe Plug

18. 1” Pipe Plug

19. 2” Pipe Plug

20. Float Ball

21. Float Rod

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