50-60 Hanover Road, Florham Park, New Jersey 07 32
ASCO Valves
Page 2 of 2 Form No.V6855R1
IMPORTANT: These solenoid valves are intended for use on
clean dry air or inert gas, filtered to 50 micrometres or better.
The dew point of the media should be at least 10 C (18 F)
below the minimum temperature to which any portion of the
clean air/inert gas system could be exposed to prevent freezing.
If lubricated air is used, the lubricants must be compatible with
Buna N elastomers. iester oils may cause operational
problems. Instrument air in compliance with ANSI/ISA
Standard S7.3-1975 (R1981) exceeds the above requirements
and is, therefore, an acceptable media for these valves.
MAINTENANCE
WARNING: To prevent the possibility of personal
injury or property damage, turn off electrical power,
depressurize valve, and vent fluid to a safe area before
servicing the valve.
NOTE: It is not necessary to remove the valve body from the
pipeline for repairs. However, piping or tubing must be
removed from Port 3 connection.
Cleaning
All solenoid valves should be cleaned periodically. The time
between cleanings will vary depending on the medium and
service conditions. In general, if the voltage to the coil is
correct, sluggish valve operation, excessive noise or leakage will
indicate that cleaning is required. In the extreme case, faulty
valve operation will occur and the valve may fail to shift. Clean
strainer or filter when cleaning the valve.
Preventive Maintenance
Keep the medium flowing through the valve as free from
dirt and foreign material as possible.
While in service, the valve should be operated at least once
a month to insure proper opening and closing.
Depending on the medium and service condition, periodic
inspection of internal valve parts for damage or excessive
wear is recommended. Thoroughly clean all parts. If parts
are worn or damaged, install a complete ASCO Rebuild
Kit.
Causes of Improper Operation
Incorrect Pressure: Check valve pressure. Pressure to valve
must be within range specified on nameplate.
Excessive Leakage: Disassemble valve and install a
complete ASCO Rebuild Kit.
Valve isassembly
1. Disassemble valve in an orderly fashion using exploded
view for identification and placement of parts.
2. Remove solenoid, see separate instructions.
3. Unscrew cartridge assembly from valve body. Then
remove cartridge gasket and orifice gasket.
4. Clean valve and install a complete ASCO Rebuild Kit.
Valve Reassembly
1. Lubricate all gaskets with DOW CORNING 111
Compound lubricant or an equivalent high-grade silicone
grease.
2. Position cartridge gasket in valve body.
3. Install orifice gasket in recess in base of cartridge assembly.
4. Thread cartridge assembly with orifice gasket into valve
body. Then torque cartridge assembly to 175 ± 25 in-lbs
[19,8 ± 2,8 Nm].
5. Install solenoid see separate instructions. Then make up
piping and electrical connection to solenoid.
WARNING: To prevent the possibility of personal
injury or property damage, check valve for proper
operation before returning to service. Also perform
internal seat and external leakage tests with a
nonhazardous, noncombustible fluid.
6. Restore line pressure and electrical power supply to valve.
7. After maintenance is completed, operate the valve a few
times to be sure of proper operation.
OR ERING INFORMATION
FOR ASCO REBUIL KITS
Parts marked with an asterisk *) in the exploded view 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.
Torque Chart
Part Name Torque Value
In-lbs
Torque Value
Nm
Cartridge
Assembly 175 ± 25 1 ,8 ± 2,8
cartridge
assembly
gasket
orifice
gasket
valve body
(stainless steel)
mounting
bracket
valve body
(brass)
cartridge
mounting
bracket
Indicates parts
supplied in
Rebuild Kit
1/8 NPT
wrenching flat
(See instructions in
Piping section)
Figure 3. Series 8314 without solenoid.
