Vag GA Industries Figure 930-D User manual

INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Figures 930-D, 930-U
10”& 12” Air & Vacuum Valves
for Clean Water
234 Clay Avenue • Mars, PA 16046 USA
Telephone [phone] • Fax [phone]
E-mail: [e-mail]
Manual Number 930.3-IOM 111420

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INSTALLATION, OPERATION and
MAINTENANCE
Figures 930-D, 930-U Air & Vacuum Valves
INTRODUCTION
This manual will provide the information to
properly install, operate and maintain the valve
to ensure a long service life. The Figure 930 Air
& Vacuum Valve is ruggedly constructed to
provide years of trouble-free operation with
minimal maintenance.
These Air & Vacuum Valves are not intended for
use with fluids containing suspended solids such
as wastewater and sewage. The GA Industries
Figure 935 Sewage Service Air & Vacuum
Valves are recommended for such applications.
CAUTION
The valve is NOT recommended for use with
toxic fluids, fuels or fluids containing hazardous
gases
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 930 Air & Vacuum Valve allows air
that is being pushed ahead of the incoming fluid
to escape and ensure a complete filling of the
pipeline or vessel. Once the air has been
exhausted and the system is pressurized the
valve closes tight. It does not re-open unless
and until the system is drained and/or a negative
pressure condition occurs within the pipe or
vessel in order to admit air to minimize the
vacuum condition.
The Figure 930 employs the Kinetic aero-
dynamic operating principle to ensure the valve
is not prematurely blown shut by the high
velocity exiting air.
RECEIVING AND STORAGE
Inspect the valve upon receipt for damage
during shipment. Carefully unload all valves to
the ground without dropping. Do not pick up the
valve by the “cowl.” 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
Figure Numbers suffixed with “D” (e.g., 930-D)
indicate the valve has ANSI Class 125 flanged
pipeline connection. Figure Numbers suffixed
with “U” (e.g., 930-U) indicate the valve has
ANSI Class 250 flanged pipeline connection.
Sizes 10” & 12”Figure Numbers 930-D and 930-
U are standard with an outlet cowl, indicated by
a “C” (e.g., 930-DC). In lieu of a cowl, the valve
can be supplied with an ANSI Class 125 flanged
outlet connection, indicated by a “J” (e.g., 930-
UJ).
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 just prior to valve closure. If installed
indoors or in a vault, the valve outlet should be
directed 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 OVER-
TIGHTEN.
Flat-faced flanged valves should be mated with
flat-faced flanges and full-face gaskets. If ring

3
gaskets are used the bolt material shall be
ASTM A307 Grade B (or equivalent). Higher
strength bolting should only be used with full-
face gaskets.
Lower heavy valves using slings or chains
around the valve body and/or the lifting eye.
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 930 Air & Vacuum Valve
has a cast iron body and cover, a 316 stainless
steel float ball, Buna-N rubber seat and an outlet
cowl. Refer to the List of Materials submitted
for the order if non-standard materials were
provided.
Refer to Page 4 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 an outlet connection at the top through
which air leaves the valve (during filling) and
enters the valve (during draining). The outlet
may be fitted with a “cowl” to deflect air during
venting and minimize entry of foreign matter
during air admission or a flanged connection to
permit the outlet to be piped to a drain.
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 930 Air & Vacuum Valves require no
scheduled lubrication, adjustment or preventive
maintenance.
The float ball with attached float guide are the
only moving parts and require no lubrication.
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 vacuum
forms inside the valve as the water leaves.
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 when pressurized.
TROUBLESHOOTING
•Valve Does Not Close / Fluid Leakage
Verify debris has not collected on the seat
preventing tight closure
Verify the pressure at the valve inlet is at
least 10 PSI
Verify rubber seat and/or float ball seating
surfaces are not deformed or damaged
Verify float guide is undamaged and
attached to float
Verify float has buoyancy
Verify float ball rises freely without
binding or sticking
•Valve Does Not Open
Verify there is no pressure inside the
valve.
Verify there is no debris in the valve that
is preventing the float from freely falling
when fluid is drained from valve
DISASSEMBLY
Although small a size Figure 930 Air & Vacuum
Valve 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 (4 and
8) and lift off cover (2), it may be necessary to
pry the cover off.

4
Lift out the float ball (10) with float guide (9)
attached. Remove the rubber cushion (8) and
flange bearing (13).
Invert cover and remove O-ring (6), seat screws
(5), follower ring (4) and seat (3).
Inspect all parts for wear and damage. Minor
scratches in the float are normal. Some floats
may contain sand for added weight but if water
is detected replace the float. Clean any scale
build up from the float ball. The float ball (10)
can be inverted to obtain a fresh sealing surface.
Replace damaged parts.
REASSEMBLY
Reassembly is performed in reverse order from
disassembly. Clean all parts especially the
threaded, seating and sealing surfaces before
reassembling valve. Worn or damaged parts
should be replaced.
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: [email protected]
Please have the nameplate data available when
ordering parts.
REPAIR KITS
Soft Goods Repair Kits
10”Kit A930-10 Part Number 2-80-11000-012
12”Kit A930-12 Part Number 2-80-11000-013
Soft goods kit contains items 3, 6 and 8
All other parts ordered individually
WARRANTY
The Warranty for GA Industries valves is
included in our Terms and Conditions which can
be found here: https://gaindustries.com/terms
PARTS LIST
10” and 12” Figures 930-D, 930-U
Item Name Standard Material
1. Body Cast Iron
2. Cover Cast Iron
3. Seat Buna-N Rubber
4. Follower Ring 316 Stainless Steel
5. Seat Screws 304 Stainless Steel
6. Cover O-ring Buna-N Rubber
7. Cover Bolt Steel, Zinc Plated
8. Cushion Buna-N Rubber
9. Float Guide 303 Stainless Steel
10. Float Ball 316 Stainless Steel
11. Pipe Plug Steel
12. Cover Nut Steel, Zinc Plated
13. Guide Bearing Acetal Copolymer
14. Cowl Steel
15. Cowl Bolt Zinc Plated Steel
16. Cowl Washer Zinc Plated Steel
Note: Parts 14, 15 & 16 not supplied on Figure
930-DJ or 930-UJ Air & Vacuum Valves with
flanged outlet.