Galley 8221 Installation Manual

Installation & Maintenance Instructions

Number

Number

SERIES

2-WAY INTERNAL PILOT-OPERATED SOLENOID VALVES

NORMALLY CLOSED OPERATION Ċ SOFT CLOSING

3/8I, 1/2I, OR 3/4I NPT Ċ 9/16I OR 3/4I ORIFICE

IMPORTANT: See separate solenoid installation and
maintenance instructions for information on: Wiring,
Solenoid Temperature, Causes of Improper Operation, Coil
or Solenoid Replacement.

DESCRIPTION

Series 8221 valves are 2-way normally closed, internal
pilot-operated solenoid valves designed for soft closing.
Valves are made of forged brass with internal parts of brass
or stainless steel and elastomers of Buna N or ethylene
propylene depending upon service requirements. Valves
may be provided with a general purpose or
explosionproof/watertight solenoid enclosure.

OPERATION

Normally Closed: Valve is closed when solenoid is

de-energized; open when energized.

IMPORTANT: Minimum operating pressure differential
required is 5 psi. Valve will remain open down to 3 psi
differential.

INSTALLATION

Check nameplate for correct catalog number, pressure,
voltage, frequency, and service. Never apply incompatible
fluids or exceed pressure rating of the valve. Installation and
valve maintenance to be performed by qualified personnel.

Future Service Considerations

Provision should be made for performing seat leakage,
external leakage, and operational tests on the valve with a
nonhazardous, noncombustible fluid after disassembly and
reassembly.

Temperature Limitations

For maximum valve ambient and fluid temperatures, refer
to chart. Check catalog number prefix and suffix on
nameplate to determine the maximum temperatures. See
example following chart.

Construction

AC or DC

AC

DC

e

Catalog
Number

Prefix

None None 125 180

HT None 140 180

None HW 125 210

HT HW 140 210

None,
or HT

Catalog
Number

Suffix

None 104 150

MCMXCIV All Rights Reserved.

Maximum

Temperature _F

Ambient Fluid

8221

Form No.V6489R1

EXAMPLES: For Catalog No. HT8221G3, AC construction
the maximum ambient temperature is 140_ F with a
maximum fluid temperature of 180_F. For Catalog No.
8221G1HW, AC construction the maximum ambient
temperature is 125_ F with a maximum fluid temperature of
210_F.

Positioning

This valve is designed to perform properly when mounted in
any position. However, for optimum life and performance,
the solenoid should be mounted vertically and upright to
reduce the possibility of foreign matter accumulating in the
solenoid base sub-assembly area.

Piping

Connect piping to valve according to markings on valve
body.

CAUTION: Valves with suffix HW" in the catalog
number are equipped with ethylene propylene
elastomers which can be attacked by oils and
greases. Wipe the pipe threads clean of cutting oils.

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.

IMPORTANT: 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 8602 for strainers.

MAINTENANCE

Note: It is not necessary to remove the valve from the
pipeline for repairs.

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.

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.

Printed in U.S.A.

Page 1 of 4

ASCO Valves

50-60 Hanover Road, Florham Park, New Jersey 07932

Preventive Maintenance

S Keep the medium flowing through the valve as free from

dirt and foreign material as possible.

S While in service, the valve should be operated at least

once a month to ensure proper opening and closing.

S Depending 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

S Incorrect Pressure: Check valve pressure. Pressure to

valve must be within range specified on nameplate.

S Excessive Leakage: Disassemble valve and clean all parts.

If parts are worn or damaged, install a complete ASCO
Rebuild Kit.

Valve Disassembly

Note: Refer to Figure 1 for AC construction and Figure 2 for
DC construction.

1. Disassemble valve in an orderly fashion using exploded
views for identification of parts.

2. Remove solenoid, see separate instructions.

3. Unscrew solenoid base sub-assembly and remove core
assembly, core spring and bonnet gasket.

4. Remove bonnet screws and valve bonnet from valve
body. Then remove the following parts: piston spring,
lip seal, support, piston, disc, snubber, body gasket,
bleed gasket, flow control, and pilot gasket.

5. All parts are now accessible to clean or replace.
Replace worn or damaged parts with a complete ASCO
Rebuild Kit.

Valve Reassembly

1. Reassemble valve using exploded views for
identification and placement of parts.

2. Lubricate the disc and all gaskets with DOW
CORNINGr 111 Compound lubricant or an
equivalent high-grade silicone grease.

3. Position flow control in valve body with concave end
outward; facing valve bonnet.

4. Position bleed gasket, pilot gasket, and body gasket in
valve body.

5. Preassemble snubber, disc and piston to form piston
assembly. Install snubber into recessed side of disc and
press this assembly into the piston.

6. Position lip seal, flanged end up, onto piston. Position
support in valve body and install piston with snubber,
disc, and lip seal into support.

WARNING: To prevent the possibility of
personal injury or property damage, the valve
bonnet and valve body must be in proper
alignment. When assembling, be sure that
either the letters MB (if present) on the valve
bonnet line up with IN on the valve body, or
that the word OUT (where applicable) lines up
with OUT on the valve body. Both MB and the
word OUT may be present on the same valve
bonnet.

7. Replace piston spring, valve bonnet, and bonnet
screws. Torque bonnet screws in a crisscross manner to
95 ± 10 in-lbs [10,7 ± 1,1 Nm].

8. Replace solenoid base gasket, core assembly, core
spring, and solenoid base sub-assembly.

Note: For AC construction, position wide end of core spring
in core first, closed end protrudes from top of core.

9. Torque solenoid base sub-assembly to 175 ± 25 in-lbs
[19,8 ± 2,8 Nm].

10. Install solenoid, see separate solenoid instructions.
Then make electrical hookup 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.

11. Restore line pressure and electrical power supply to
valve.

12. After maintenance is completed, operate the valve a
few times to be sure of proper operation.

ORDERING INFORMATION

FOR ASCO 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.

Page 2 of 4 Form No.V6489R1

ASCO Valves

50-60 Hanover Road, Florham Park, New Jersey 07932