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

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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 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 905 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
Verify pressure at valve inlet is at least 10
PSI
•
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
Verify pressure at valve inlet does not
exceed maximum working pressure
DISASSEMBLY
Although the Figure 905 air release 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 screws (13) and lift off
cover (2) with float and linkage attached. It may
be necessary to pry the cover off. Be careful not
to damage or lose the cover gasket (3) unless it
will be replaced.
Remove the spring pin (14) to free the float arm
(5) with float ball (9) attached. Remove the
rubber orifice button (7) by pulling it out of the
float arm (5). No further disassembly is needed
to replace the rubber orifice button (10)
Use a
½” hex socket to remove the orifice (4)
and lift off the leverage bracket (6).
Remove the float screw (10) being careful not to
lose the lock washer (11).
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
Reassembly is performed in reverse order from
disassembly. Clean all parts especially the
threaded, seating and sealing surfaces before
reassembling valve. Worn parts should be
replaced.
Clean with Loctite 649 (or equal) primer and
apply Loctite
©
271 (or equal) sealant to the
threads of the orifice (4) before installation into
cover. Torque to maximum 22 ft-lbs.