Control Products 8220 Installation Manual

Installation & Maintenance Instructions

2-WAY INTERNAL PILOT-OPERATED SOLENOID VALVES

NORMALLY CLOSED OPERATION Ċ STEAM OR HOT WATER SERVICE

1, 1¼, 1½, 2 OR 2½ NPT

Future Service Considerations

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

DESCRIPTION

Series 8220 valves are 2-way normally closed, internal pilot
operated solenoid valves designed for steam or hot water
service. These valves are made of forged brass with stainless
steel internal parts ethylene propylene and/or TEFLON*
elastomers depending upon construction. Series 8220 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
required is 5 psi. Valve will remain open down to 3 psi
differential once opened at 5 psi or higher.

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.

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.

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 markings on
valve body.

CAUTION: This valve is 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.

SERIES

8220

Form No.V6082R6

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

Temperature Limitations And Pressure Ratings

For maximum valve ambient and fluid temperatures, refer
to chart below. Check nameplate for maximum pressure
rating.

Maximum Pressure

Rating psi & Service

(Maximum Operating

Pressure Differential)

50 steam F or H 77 125 300

125 steam H 77 125 353

150 hot water F or H 77 125  210

 Note: Maximum ambient temperature for valves with
design change letter G or higher within the catalog number,
for example Catalog No. 8220G15.



Coil

Class

Maximum

Ambient

Temp. F

MM All Rights Reserved.

Maximum

Fluid

Temp.F

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 periĆ
odically depending on service conditions. See ASCO
Series 8600, 8601 and 8602 for strainers.

MAINTENANCE

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 pipeĆ
line 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 corĆ
rect, 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.

*DuPont Co. Registered Trademark

Printed in U.S.A.

Page 1 of 4

50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com

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 ensure proper opening and closing.

 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

 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
Reb uild K it.

Valve Disassembly

Note: Check pressure rating on nameplate to determine
valve construction. Refer to Figure 1 on page 3 for valves
with a pressure rating of 50 psi steam or 150 psi hot water.
Refer to Figure 2 on page 4 for valves with a pressure rating
of 125 psi steam or 150 psi hot water.

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

CAUTION: On 2 and 2½ NPT valves there is a

body plug on the outlet side of the valve body. Do not
remove this body plug. The body plug has been
sealed in place at the factory. Removal is not
necessary for valve cleaning or rebuilding.

2. Remove solenoid, see separate instructions.

3. Unscrew solenoid base sub-assembly and remove core
assembly, core spring, 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 thin wall socket wrench.

5. Remove bonnet screws and valve bonnet from valve
body. Then remove the following parts: piston spring,
support, lip seal, piston assembly, body passage eyelet
or body passage tube, body passage gasket, inner and
outer body gaskets or large body gasket (see note).

Note: On some 1 and 1¼ 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 1½, 2 & 2½ NPT valve
constructions continue to use two body gaskets.

6. On valves rated for 50 psi steam or 150 psi hot water reĆ
move aspirator tube, disc, disc gasket (on 2 & 2½
NPT valves only) and disc washer (on 1, 1¼ & 1½
NPT valves only) from piston.

7. All parts are now accessible to clean or replace. If parts
are worn or damaged, install a complete ASCO Rebuild
kit.

Page 2 of 4 Form No.V6082R6

Valve Reassembly

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

2. Lubricate the solenoid base gasket, and the surface of
the piston which contacts the lip seal with DOW
CORNING 200 Fluid lubricant or an equivalent
high-grade silicone fluid.

3. Lubricate large body gasket or inner and outer body
gaskets, body passage gasket, disc, and disc gasket (on
2 and 2½ NPT valves only) with DOW CORNING
111 Compound lubricant or an equivalent high-grade
silicone grease.

4. Position the following parts in the valve body: support,
body passage gasket, body passage eyelet or body pasĆ
sage tube, inner and outer body gaskets or large body
gasket.

5. On valves rated for 50 psi steam or 150 hot water
reassemble piston assembly following views provided in
Figure 1 on page 3.

6. Position lip seal, flanged end outward, onto piston
assembly. Install piston assembly with lip seal into
support in valve body cavity.

7. Replace piston spring, valve bonnet, and bonnet screws.
Torque bonnet screws in a crisscross manner to 144 ± 15
in-lbs [16,3 ± 1,7 Nm].

8. If removed, replace valve seat with a small amount of
thread compound on male threads to avoid possible leakĆ
age. Torque valve seat to 65 ± 15 in-lbs [7,3 ± 1,7 Nm].

9. Replace solenoid base gasket, core assembly, core
spring, core guide, and solenoid base sub-assembly.
Torque solenoid base sub-assembly to 175 ± 25 in-lbs
[19,8 ± 2,8 Nm].

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

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 nonĆ
hazardous, 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. A metallic
click indicates the solenoid is operating.

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.

50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com