Asco 8342 series Instruction Manual

Page 1 of 4
50 Hanover Road, Florham Park, New Jersey 0793 www.ascovalve.com
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Installation & Maintenance Instructions SERIES
Form No. V6319R3
4-WA DIRECT-ACTING SOLENOID VALVES 8342
BRASS AND STAINLESS STEEL CONSTRUCTION
1/4I AND 3/8I NPT - 3/16I ORIFICE
NOTICE: See separate solenoid installation and maintenance
instructions for information on: Wiring, Solenoid
Temperature, Causes of Improper Operation, Coil or Solenoid
Replacement.
DESCRIPTION
Series 8342 valves are 4-way direct-acting solenoid valves
that require no minimum operating pressure and no minimum
flow for operation. Valves are made of rugged brass or stainless
steel and have a sliding resilient seal for tight seating. Standard
valves have a general purpose solenoid enclosure. Valves may
be provided with a combination e plosionproof/watertight
solenoid enclosure.
Series 8342 valves with Suffi P in the catalog number are
designed specifically for dry inert gas or non-lubricated air
service.
OPER TION
Solenoid de-energized: Flow is from Pressure P to Cylinder A
and from Cylinder B to E haust E.
Solenoid energized: Flow is from Pressure P to Cylinder B and
from Cylinder A to E haust E.
NOTE: No minimum operating pressure required.
Flow Diagrams
Solenoid De-energized Solenoid Energized
PRESS.
EXH.
SOL.SOL.
A
B
P
E
PRESS.
EXH.
A
B
P
E
NOTE: For 3-way application, one cylinder port can be
plugged. Plug Cylinder A for normally closed operation or
Cylinder B for normally open operation.
IMPORT NT: Flow controls or regulators may be placed at
any of the port connection without adversely affecting valve
operation.
Metering Device (Optional feature)
Valves with suffi M in the catalog number are provided with a
built-in metering device (flow control) for each cylinder
connection. To adjust metering device, release locknut by
turning it counterclockwise. To increase flow, turn metering
stem clockwise. To reduce flow, turn metering stem
counterclockwise. After adjusting to desired flow, hold
metering stem and tighten locknut. The metering stem closest
to the solenoid controls Cylinder A; the adjacent metering stem
controls Cylinder B.
Manual Operation
Manual operator allows manual operation when desired or
during an electrical power outage. Depending upon valve
requirements, two types of manual operators are available:
Momentary Push Type (Suffix MO) Manual Operator
To engage push type manual operator, push stem at base of
valve body upward as far as possible. Valve will now be in the
same position as when the solenoid is energized. To disengage
manual operator, release stem. Manual operator will return to
original position.
Maintained Screw Type (Suffix MS) Manual Operator
To engage screw type manual operator, push red knob upward
towards valve body and turn it clockwise until flow from port is
stopped. Valve will now be in the same position as when
solenoid is energized.
CAUTION: If manual operator is not turned clockwise
after pushing upward to engage, leakage at exhaust port
may occur.
To disengage manual operator and return valve to the
de-energized position, turn red knob counterclockwise
allowing stem to disengage and drop.
CAUTION: For valve to operate electrically, manual
operator must be fully disengaged.
INST LL TION
Check nameplate for correct catalog number, pressure,
voltage, frequency and service. Never apply incompatible
fluids or e ceed 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, e ternal
leakage, and operational tests on the valve with a
nonhazardous, noncombustible fluid after disassembly and
reassembly.
Temperature Limitations
For ma imum valve ambient and fluid temperatures, refer to
chart below. Check catalog number prefi and watt rating on
nameplate.
Watt
Rating
Catalog
Number
Prefix
Coil
Class
Max.
Ambient
Temp.
Max.
Fluid
Temp.
0
None, DP
or KP F77_F ( 5_C) 160_F
0
HB or KB H1 5_F
(51.7_C)
160 F
(71_C)
01
None, KP,
SP or SD F1 5_F (51.7_C) 160_F
0.1 HB, KB,
SS or SV H140_F (60_C)
160 F
(71_C)
I&M No. V  R
E21903 - 1/12
I&M No. V 6319 R4

50 Hanover Road, Florham Park, New Jersey 0793 www.ascovalve.com
Page of 4 Form No.V6319R3
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.
Mounting
For body boss mounting dimensions, see Figure 1. below.
.94
[ 4]
.56
[14]
. 50- 0 UNC- B
. 5 [6] deep
mounting holes
Figure 1. Mounting dimensions
Piping
Connect piping to valve according to markings on valve body.
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.
M INTEN NCE
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: For inspecting, cleaning or rebuilding, remove piping
from Cylinder Ports A and B.
Cleaning
All solenoid valves should be cleaned periodically. The time
between cleaning will vary depending on the medium and
service conditions. In general, if the voltage to the coil is
correct, sluggish valve operation, e cessive noise or leakage will
indicate that cleaning is required. In the e treme case, faulty
valve operation will occur and the valve may fail to shift. Clean
strainer or filter when cleaning the valve.
Preventive Maintenance
SKeep the medium flowing through the valve as free from dirt
and foreign material as possible.
SWhile in service, the valve should be operated at least once
a month to insure proper shifting.
SDepending on the medium and service conditions, periodic
inspection of internal valve parts for damage or e cessive
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 (Refer to Figure 4)
1. Remove piping from Cylinders A and B and disassemble
valve in an orderly fashion. Use e ploded views provided
for identification and placement of parts.
2. Remove solenoid enclosure. See separate instructions.
3. Unscrew solenoid base sub-assembly and remove core
spring guide and core spring.
4. Remove end cap screws (4), end cap and end cap gasket
from valve body.
5. Pull sleeve/disc/spring assembly containing disc
assemblies, disc spring and sleeve from valve body. Then
remove sleeve spring, core and bonnet gasket.
Note: On suffi P valve constructions, the core contains
three rider rings.
6. If cleaning is all that is required, do not remove body seat
(e haust), body seat gasket, end cap seat (cylinder), end
cap seat gasket, or orifice gaskets. Remove these only if
replacement seats and gaskets are available.
7. To remove body seat (e haust) and seat gasket, insert an
appropriate tool or a heavy gauge wire with a bent hook
on the end through the center hole in the seat. Pull to
dislodge seat. If seat will not dislodge easily, remove
piping from e haust port and push seat out with a thin rod
through the e haust port.
To remove end cap seat (cylinder) and gaskets, push seat
from end cap, using thin blunt rod inserted through hole
between Cylinder Port A and Cylinder Port B. When the
end cap contains metering devices, apply compressed air
through either pipe connection or the small vent hole in
the end cap to force out the end cap seat with the gasket.
If this fails, use the appropriate tool or bent wire described
above to dislodge the end cap seat with the gasket.
8. All parts are now accessible for cleaning or replacement.
If parts are worn or damaged, install a complete ASCO
Rebuild Kit.
Valve Reassembly
1. Lubricate all gaskets with DOW CORNINGr 111
Compound lubricant or an equivalent high-grade
silicone grease. Lubricate seating surface of end cap seat,
body seat and disc assemblies (including u-cups) with
Dow Corning Corporation's MOLYKOTEr M-77 Paste
lubricant supplied in ASCO Rebuild Kit. Note: On suffi
P valve constructions, lubricate core spring with lubricant
supplied.
2. Replace body seat gasket on body seat and install seat with
gasket side first into valve body.
3. Preassemble disc assembly on disc spring and install into
sleeve. Install remaining disc assembly from the opposite
end. The disc assemblies will snap onto the disc spring if
pushed evenly and twisted slightly.
I&M No. V 6319 R4

50 Hanover Road, Florham Park, New Jersey 0793 www.ascovalve.com
Page 3 of 4Form No.V6319R3
4. Install sleeve/disc/spring assembly into the valve body and
onto core simultaneously.
5. Install end cap assembly consisting of end cap, end cap
gasket, end cap seat, seat gasket and orifice gaskets (2).
Install end cap screws (4) and torque in a crisscross
manner to 110 ± 10 in-lbs [12,4 ± 1,1 Nm].
6. Move the core up and down to see that it is properly
engaged and there is no misalignment or binding of parts.
7. Replace bonnet gasket, sleeve spring, core spring and
core spring guide.
8. Replace solenoid base sub-assembly and torque to
175 ± 25 in-lbs [19,8 ± 2,8 Nm].
9. Install solenoid. See separate instructions.
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 nonhazardous, noncombustible fluid.
10. Restore line pressure and electrical power supply to valve.
11. After maintenance is completed, operate the valve a few
times to be sure of proper operation. A metallic click
indicates the solenoid is operating.
Metering Device Disassembly (Refer to Figure 2)
1. Loosen and remove locknut.
2. Unscrew metering cap with gasket and remove
stem/disc/spring assembly intact. A special wrench is
available for metering cap removal or installation. Order
ASCO Wrench Kit No. K158477-001.
3. Unscrew metering stem from cap and remove disc spring,
metering disc and metering stem gasket.
4. If cleaning is all that is required, do not remove end cap
seat with gaskets. Remove these only if replacement seat
and gaskets are available. If replacement is necessary, use
an appropriate tool or compressed air as previously
described in Valve Disassembly to dislodge end cap seat.
5. All parts are now accessible for cleaning or replacement.
If parts are worn or damaged, install a complete ASCO
Rebuild Kit.
Metering Device Reassembly
1. Reassemble in reverse order of disassembly. Use
e ploded views provided for identification and placement
of parts.
2. Lubricate metering cap and stem gaskets with DOW
CORNINGr 111 Compound lubricant or an equivalent
high-grade silicone grease.
3. Replace metering stem gasket, metering disc and disc
spring on metering stem.
CAUTION: Metering disc must be assembled as
indicated in Figure 2.
4. Install cap on stem/disc/spring assembly.
5. Install stem/disc/spring assembly intact then torque
metering cap to 110 ± 10 in-lbs [12,4 ± 1,1 Nm].
6. Replace locknut (loosely) and make adjustments as
follows: To Increase Flow: Turn metering stem clockwise.
To Reduce Flow: Turn metering stem counterclockwise.
7. After adjusting to desired flow, hold metering stem and
tighten locknut.
Manual Operator (Optional feature)
No field maintenance need be performed on the manual
operator. However, it may be removed and replaced for
general cleaning or inspection (Refer to Figure 3).
ORDERING INFORM TION
FOR SCO REBUILD KITS
Parts marked with an asterisk (*) in the e ploded 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.
metering end cap
metering cap
metering stem
metering disc
metering stem gasket
disc spring
metering cap
locknut
Special wrench available for metering cap.
Wrench Kit Order No. K158477-001
Indicates Parts Supplied
in ASCO Rebuild Kits
Figure . Metering device (optional)
Figure 3. Manual operator (optional)
Partial view of
valve body
Indicates Parts Supplied
in ASCO Rebuild Kits
manual operator
gasket
manual operator
assembly
gasket
Screw type shown
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I&M No. V 6319 R4

50 Hanover Road, Florham Park, New Jersey 0793 www.ascovalve.com
Page 4 of 4 Form No.V6319R3
Torque Chart
Part Name Torque Value Inch-Pounds Torque Value Newton-Meters
Solenoid base sub-assembly 175 ± 5 19,8 ± ,8
End cap screws & Metering cap 110 ± 10 1 ,4 ± 1,1
Manual operator assembly 150 ± 10 17 ± 1,1
Figure 4. Series 834 valve without solenoid.
solenoid base
sub-assembly
core
bonnet gasket
body seat gasket
body seat (exhaust)
end cap gasket
end cap screw (4)
end cap
orifice gaskets
sleeve/disc/spring assembly
Indicates Parts Supplied
In ASCO Rebuild Kits
core spring
end cap seat (cylinder)
end cap seat gasket
disc assembly
sleeve
disc spring
disc assembly
core spring
sleeve spring
guide
Suffix P"
Construction
core
with rider rings
I&M No. V 6319 R4