Cambridge Air Solutions M Series, Техническое руководство

Страница: 64 / 112

Cambridge Air Solutions. 62 M-Series Technical Manual
ASCO GAS VALVES: SERIES 8214
Disassemble the valve (See page 63) and clean all parts
as follows:
IMPORTANT
If parts are worn or damaged, install a complete ASCO
Rebuild Kit.
1. Remove the solenoid enclosure.
2. Remove the bonnet screws, valve bonnet, bonnet
gasket, core/diaphragm sub-assembly and body gasket.
3. All parts are now accessible to clean or replace.
4. Lubricate the bonnet gasket and body gasket with a
light coat of Dow Corning
®
200 Fluid lubricant or an
equivalent high-grade silicone fluid.
5. Apply a light coat of RemGrit TFL 50
®
Dry Lubricant
to: the valve seat; the valve body surface where
diaphragm assembly contacts the valve body and body
gasket; and internal surface of the valve bonnet where
the diaphragm assembly contacts the bonnet when the
valve is in the energized (open) position.
IMPORTANT:
If the valve has been disassembled for inspection and
cleaning only and a Rebuild Kit is not being installed,
lubricate the following with RemGrit TFL 50® Dry
Lubricant:
• Diaphragm assembly on both sides
• Main disc at base of core/diaphragm sub-assembly
• Pilot disc at base of core assembly

CAUTION:
Do not distort the hanger spring between the core
assembly and the diaphragm assembly when
lubricating the pilot disc.
6. Replace the body gasket and the core/diaphragm sub-
assembly with the closing spring attached. Locate
the bleed hole in the core/diaphragm sub-assembly
approximately 30˚ CCW from the valve inlet.
7. Replace the valve bonnet and the bonnet screws (6).
Torque the screws in a crisscross manner to 100 ± 10
in-lbs. Replace the solenoid and make the electrical
hookup.

WARNING:
To prevent the possibility of severe personal injury
or property damage, check the valve for proper
operation before returning to service. Also perform
a gas valve leak check and gas train leak check
in accordance with steps 8 and 9 of the Start-up
Procedures (See pages 33 & 34).
ORDERING INFORMATION FOR ASCO
REBUILD KITS
Parts marked with an asterisk (*) in the exploded views
are supplied in Rebuild Kits.
When ordering Rebuild Kits for ASCO valves, order the
Rebuild Kit number stamped on the valve nameplate. If
the number of the kit is not visible, order by indicating
the number of kits required, and the Catalog Number
and Serial Number of the valve(s) for which they are
intended.
GAS TRAIN LEAK CHECK
Periodically check the gas control assembly, internal
and external piping for leaks. Refer to step 9, Gas Train
Leak Check, of the Start-up Procedures (see page 34).
All relief vents on the gas controls should be checked for
blockage (gas pressure regulators and pressure switches).