Asco 8220 Series Installation and operating instructions

Page 1 of 3
All Rights Reserved.
E208523---04/10
ASCO Valves
EASCO Valve, Inc.R50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
R
Installation & Maintenance Instructions SERIES
I&M No.V9571R3
8220
2--WAY INTERNAL PILOT--OPERATED SOLENOID VALVES
NORMALLY CLOSED OPERATION — STEAM OR HOT WATER SERVICE
3/8I1/2I3/4INPT
NOTICE: See separate solenoid installation and
maintenance 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 and 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.
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.
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 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)
Wat t
Rating
AC
Coil
Class
Max.Amb.
Te m p . _F
Max.Fluid
Te m p . _F
50 Steam
150 Hot Water 6.1
6.1
F
F
32---125_F
( 0 --- 5 2 _C){
300_F
(149_C)
32---210_F
( 0 --- 9 9 _C)
125 Steam
150 Hot Water 10.1
10.1
H
H
32---140_F
( 0 --- 6 0 _C)
353_F
(178_C)
32---210_F
( 0 --- 9 9 _C)
32---125_F
( 0 --- 5 2 _C){
32---140_F
( 0 --- 6 0 _C)
{Note: Maximumambient temperature for valves supplied
withClassH,ACcoil(PrefixHT)is140_.
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.
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 pro-
pylene 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
valveandcauseoperationaldifficulty.Avoidpipestrainby
properly supporting and aligning piping. When tightening
thepipe,donotusevalveorsolenoidasalever.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.
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
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.
*DuPont Co. Registered Trademark

Page 2 of 3 I&M No.V9571R3
EASCO Valve, Inc.R50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
Preventive Maintenance
SKeepthemediumflowingthroughthevalveasfreefrom
dirt and foreign material as possible.
SPeriodic exercise of the valve should be considered if
ambient or fluid conditions are such that corrosion,
elastomer degradation, fluid contamination build up, or
other conditions that could impede solenoid valve
shifting are possible. The actual frequency of exercise
necessary will depend on specific operating conditions.
A successful operating history is the best indication of
a proper interval between exercise cycles.
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
Note: Check pressure rating on nameplate to determine
valve construction. Refer to Figure 1.
1. Disassemble valve in an orderly fashion using exploded
view for identification and placement of parts.
2. Remove solenoid, see separate instructions.
3. Unscrew solenoid base sub---assembly and remove core
assembly with core spring attached (external core spring
construction) or core spring and diaphragm spring
(internal core spring construction), body gasket, dia-
phragm retainer, diaphragm assembly, diaphragm sup-
port plate and strainer.
4. All parts are now accessible to clean or replace. If parts
are worn or damaged, install a complete ASCO Rebuild
kit.
Valve Reassembly
1. Reassemble valve using exploded views for
identification and placement of parts.
2. Lubricate body gasket with DOW CORNINGr200
Fluid lubricant or an equivalent high---grade silicone
fluid.
3. Position the following parts in the valve body: strainer,
diaphragm support plate (with center diameter down),
diaphragm assembly, diaphragm retainer (with outside
perimeter flange down) and body gasket.
4. Replace core assembly with core spring attached
(external core spring construction) or core spring and
diaphragm spring (internal core spring construction),
and solenoid base sub---assembly and torque to 480 ± 48
in---lbs [7,3 ± 1,7 Nm].
5. 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 non-
hazardous, noncombustible fluid.
6. Restore line pressure and electrical power supply to
valve.
7. 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 isnot 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 3 of 3 I&M No.V9571R3
EASCO Valve, Inc.R50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
To r q u e C h a r t
Part Name Torque Value Inch---Pounds Torque Value Newton---Meters
Solenoid sub --- assembly 480 ± 60 54,2 ± 6,8
diaphragm assembly
diaphragm
support plate
diaphragm retainer
core assembly
body gasket
solenoid base sub---assembly
Indicates parts supplied
in Rebuild Kit
valve body
strainer
core spring
diaphragm support plate
valve body
Partial view showing correct orientation
of diaphragm support plate being
installed into valve body
Figure 1. Series 8220 valve without solenoid.
diaphragm spring
external core spring construction
(8220G403, 8220G406, 8220G409)
internal core spring construction
(8220G401, 8220G404, 8220G407)
core spring core assembly
strainer