User Guide

50-60 Hanover Road, Florham Park, New Jersey 07932
ASCO Valves
Page 2 of 8 (Section 1 of 2) Form No.V6371R2-Sec.1
When tightening the pipe, do not use valve or operator
assembly as a lever. Locate wrenches applied to valve body
or piping as closed as possible to connection point. Valve
should be checked for external leakage at piping
connections after installation, see Testing for External
Leakage section.
CAUTION: To avoid damage to the valve body, DO
NOT OVERTIGHTEN PIPE CONNECTIONS. If
TEFLON* tape, paste, spray or similar lubricant is
used, use extra care when tightening due to reduced
friction.
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
Series 8600, 8601, and 8602 for strainers.
Testing for External Leakage
WARNING: To prevent the possibility of
severe personal injury or property damage,
extinguish all open flames and avoid any type
of sparking or ignition.
1. Block gas flow on downstream side of valve.
2. Apply pressure to valve within nameplate rating and
energize solenoid.
3. Apply a soapy solution or a commercially available leak
detecting solution to the pipe connections and check for
bubbles. If the valve has been tested for seat leakage or
disassembled and reassembled for inspecting, cleaning,
or rebuilding apply the solution around solenoid base
sub-assembly, bonnet/body joint and pipe plugs.
4. If leakage exists, depressurize valve and turn off
electrical power supply. Tighten connections as
required and retest following the above steps.
Alignment of Operating Movement
To facilitate installation and for desirable visual positioning,
the operating movement with the solenoid may be rotated
in increments of 90. Remove cover screws (5), instruction
plate, position indicator window and cover gasket from lever
side of operating movement. Using a wrench, loosen
housing nut. Rotate operating movement to desired
position. Torque housing nut to 175 ± 25 in-lbs [19,8 ± 2,8
Nm]. Replace cover gasket, position indicator window,
instruction plate and cover screws. Torque cover screws in
a crisscross manner to 10 in-lbs [1,1 Nm].
MAINTENANCE
WARNING: To prevent the possibility of
severe personal injury or property damage,
turn off electrical power, depressurize valve,
extinguish all open flames and avoid any type
of sparking or ignition. Vent hazardous or
combustible 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 manual reset 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
 Keep the medium flowing through the valve as free from
dirt and foreign material as possible.
 When in service, the valve should be operated every two
weeks to ensure proper operation. If necessary, electrical
wiring and piping connections should be made so valve
can be test operated without affecting other equipment.
 Inspect bonnet assembly for leakage at bleed hole.
Leakage indicates worn internal seals and a complete
ASCO Rebuild Kit should be installed.
 Periodic inspection of the operating movement should be
carried out. Operating movement should be kept clean
and free from paint, foreign matter, corrosion, freezing,
and icing conditions.
 Depending on medium and service conditions, periodic
inspection of internal valve and solenoid 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 clean all parts.
If parts are worn or damaged, install a complete ASCO
Rebuild Kit.
*DuPont's Registered Trademark