Galley 8222 Installation Manual

Installation & Maintenance Instructions

2-WAY INTERNAL PILOT-OPERATED SOLENOID VALVES

NORMALLY CLOSED OPERATION Ċ 1I, 1¼I, OR 1½I NPT

STEAM SERVICE

SERIES

8222

Form No.V5531R5

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

DESCRIPTION

Series 8222 valves are 2-way normally closed, internal
pilot-operated solenoid valves designed for steam
service. These valves are made of rugged brass or
stainless steel. Internal parts are stainless steel with
ethylene propylene and Teflon* elastomers. Series
8222 valves may be provided with a general purpose or
explosionproof solenoid enclosure.

OPERATION

Normally Closed: Valve is closed when solenoid is

de-energized; open when energized.

IMPORTANT: Minimum operating pressure
differential is 5 psi.

Manual Operator (optional feature)

Manual operator allows manual operation when deĆ
sired or during an electrical power outage. To engage
manual operator (open the valve), turn stem clockwise
until it hits a stop. Valve will now be in the same
position as when the solenoid is energized. To disenĆ
gage manual operator (close the valve), turn stem
counterclockwise until it hits a stop.

CAUTION: For valve to operate electrically,
manual operator stem must be fully rotated
counterclockwise.

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.

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MCMXCV All Rights Reserved.

CAUTION: Maximum operating pressure
differentials are based on temperature-related
material limitations. Therefore, do not use valves
with a steam source of higher pressure than the
nameplate maximum operating pressure
differential. Also do not use a pressure reducing
valve to reduce steam source to rated pressure
because this would result in superheated steam
of excessive temperature entering the valve.

Temperature Limitations

S Maximum Ambient 77_F

S Maximum Fluid 353

_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 or tubing to valve according to markĆ
ings on valve body.

CAUTION: This valve is equipped with ethyĆ
lene 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.

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 8602 for strainers.

*DuPont's Registered Trademark

Printed in U.S.A.

Page 1 of 4

ASCO Valves

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

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 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

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 insure 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.

3. Unscrew solenoid base sub-assembly from valve
body. Then remove core assembly (with spring and
core guide) and solenoid base gasket.

4. For normal maintenance (cleaning), it is not
necessary to remove the valve seat. However, for
valve seat removal use a 7/16
wrench.

5. Remove cylinder screw, and lockwashers, piston
spring, and piston assembly with piston ring and
rider rings attached.

6. Remove one body gasket from 1I or 1 1/4I NPT
valves; two body gaskets from 1 1/2I NPT valves.
Then remove body passage eyelet and gasket from
valve body passage.

Note: On some 1I and 1 1/4I NPT valve constructions,
two body gaskets are present. When installing an
ASCO Rebuild Kit, one large body gasket is supplied.
This replaces the two body gaskets previously used.
The 1 1/2I NPT valve constructions continue to use two
body gaskets.

7. Unscrew disc nut from piston. Then remove disc
washer, (disc washer only present on 1½
valve constructions) valve disc, and back-up
washer from piston.

8. Remove piston ring and rider rings (2) from piston.

9. All parts are now accessible for cleaning or
replacement. If parts are worn or damaged, install
a complete ASCO Rebuild Kit. Be sure to clean
internal passage ways in valve body and cylinder.

I thin wall socket

I NPT

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

1. Disassemble valve in an orderly fashion. Use
exploded views for identification and placement of
parts.

2. Remove solenoid, see separate instructions.

NOTE: If the valve being disassembled has a manual
operator refer to section on Manual Operator
Disassembly.

Page 2 of 4 Form No.V5531R5

Valve Reassembly

1. Install back-up washer, valve disc and disc washer
(disc washer only present on 1½
constructions) on piston. Then replace disc nut
and tighten securely.

2. Install piston ring and rider rings (2) on piston.

3. Lubricate all gaskets with DOW CORNINGĂ
Compound lubricant or an equivalent high-grade
silicone grease.

4. If a rebuild kit is being installed, install one body
gasket on 1I or 1 1/4I NPT valves; two body gaskets
on 1 1/2I NPT valves. Then replace body passage
gasket and eyelet.

Note: If only cleaning and inspecting the valve,
re-install the existing gasket arrangement.

5. Install piston spring and piston assembly in valve
cylinder.

IĂNPT valve

r 111

ASCO Valves

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