50-60 Hanover Road, Florham Park, New Jersey 07 32 www.ascovalve.com
ASCO Valves
Page 2 of 3 Form No.V5304R3
Piping
Connect piping to valve according to markings on valve
body. Apply pipe compound sparingly to male pipe threads
only. If applied to valve threads, the compound may enter
the valve and cause operational difficulty. Avoid pipe strain
by properly supporting and aligning piping. When
tightening the pipe, do not use valve or solenoid as a lever.
Locate wrenches applied to valve body or piping as close as
possible to connection point.
CAUTION: To protect the solenoid
valve, install a strainer or filter suitable for the service
involved in the inlet side as close to the valve as
possible. Clean periodically depending on service
conditions. See ASCO Series 8600, 8601 and 860 for
strainers.
M INTEN NCE
WARNING: To prevent the possibility of
death, serious 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 from the
pipeline for repairs.
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
open or close. Clean strainer or filter when cleaning the
valve.
Preventive Maintenance
SKeep the medium flowing through the valve as free from
dirt and foreign material as possible.
SWhile in service, the valve should be operated at least
once a month to insure proper opening and closing.
SDepending on the medium and service conditions,
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
SIncorrect Pressure: Check valve pressure. Pressure to
valve must be within range specified on nameplate.
SExcessive Leakage: Disassemble valve and clean all parts.
If parts are worn or damaged, install a complete ASCO
Rebuild Kit.
Valve Disassembly
1. Disassemble valve in an orderly fashion using exploded
views for identification and placement of parts.
2. Remove solenoid enclosure. See separate instructions.
3. Unscrew solenoid base sub-assembly from valve body.
Then remove body gasket and core assembly with core
spring.
4. or normal maintenance, it is not necessary to remove
or disassemble the manual operator unless external
leakage is evident. If required, remove stem pin and
stem with gasket from valve body.
5. All parts are now accessible for cleaning or
replacement. If parts are worn or damaged, install a
complete ASCO Rebuild Kit.
Valve Reassembly
1. Lubricate all gaskets with DOW CORNINGr 111
Compound lubricant or an equivalent high-grade
silicone grease.
2. Install body gasket into valve body.
3. If removed, install manual operator stem gasket,
stem and stem pin.
4. Install core assembly with core spring into valve body.
or 1/2I NPT valve construction, wide end of core
spring in core first, closed end protrudes from top of
core.
5. Hand thread solenoid base sub-assembly into valve
body. Then torque solenoid base sub-assembly to 175
± 25 in-lbs [19,8 ± 2,8 Nm].
6. Install solenoid. See separate instructions.
WARNING: To prevent the possibility of
death, serious 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.
7. Restore line pressure and electrical power supply to
valve.
8. After maintenance is completed, operate the valve a
few times to be sure of proper operation. A metallic
click signifies the solenoid is operating.
ORDERING INFORM TION
FOR SCO REBUILD 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.
