Vag GA INDUSTRIES 983-D, Инструкция по установке, эксплуатации и обслуживанию

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1
INSTALLATION, OPERATION and
MAINTENANCE
Anti-Slam Surge Check Valves
INTRODUCTION
This manual will provide the information to
properly install, operate and maintain the valve
to ensure a long service life. GA Industries
Surge Check Valves are ruggedly constructed to
provide years of trouble-free operation with
minimal maintenance.
CAUTION
The valve is NOT recommended for use with
compressed air or other gases.
CAUTION
Surge Check Valves are not intended for used
with hazardous, flammable, or toxic fluids.
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
GA Industries Anti-Slam Surge Check Valves
are designed to minimize the surge pressure
and valve damage that can result when an air &
vacuum valve is suddenly closed by the high
velocity incoming water. The surge check valve
automatically closes to restrict the discharge
area upon excessive air discharge velocity or a
sudden transition from air to water. The
restricted area slows the incoming water
velocity, the air valve is not slammed shut and
surges are minimized.
Once the air valve is closed, the surge check
reopens to allow unrestricted air inflow.
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.
VALVE CONSTRUCTION
GA Industries Figure F284-D Anti-slam Surge
Check Valves have a globe style valve body with
integral flanges that are faced and drilled per
ANSI Class 125/150.
The valve has a fusion bond epoxy coated
ductile iron body, lead free bronze internal metal
components and a rubber seat. Refer to Page
4 for details of construction and parts location.
INSTALLATION
GA Industries Figure 284-D Anti-Slam Surge
Check Valves are usually supplied as a
component of a factory assembly consisting of
an air & vacuum valve or combination air valve
and a surge check valve.
The Figure 284-D can also be supplied as a
separate valve for field installation between the
air & vacuum valve or combination air valve and
its inlet isolating valve. In this case ensure the
valve is installed so that the end of the valve that
has the bronze seat with
“spokes” is connected
to the air valve.
CAUTION
Do not lift the valve by the bronze seat ring
spokes
The valve should be installed between standard
ANSI Class 125 or 150 flat faced flanges. Full
face flange gaskets are recommended.
Remove all packing materials from the valve,
including the tabs that retain the seat during
shipping.
If ring 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.