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a INSTALLATION AND
MAINTENANCE INSTRUCTIONS
4 - WAY VALVES — SINGLE SOLENOID
DESCRI PTION
Bulletin 8344 valves are Packless, Solenoid Pilot Controlled, Heavy
Duty, 4-Way Valves with forged brass valve bodies and poppet type
main discs. The main discs are power driven in both directions by
line pressure. No return springs are required.
The standard valves have a General Purpose, NEMA Type 1 Solenoid a
Enclosure. Valves may also be equipped with an enclosure which is
~ designed to meet NEMA Type 4 — Watertight, NEMA Type 7(Cor D)
Hazardous Locations - Class I, Group C or D, and NEMA Type 9 (E, F
or G) Hazardous Locations -
OPERATION (Referto Figure 1) — |
Solenoid de-energized flow is from Pressure Connection to Cylinder ‘A
Class II, Groups E,F or G.
Cylinder “B’ is open to Exhaust.
Solenoid energized flow is from Pressure Connection to Cylinder ‘B’;
Cylinder ‘A’ is open to Exhaust.
SINGLE SOLENOID
| CYLINDER CYLINDER CYLINDER ~~ CYLINDER
ROPA Ege
© PRESSURE p exHALST PRESSURE p EXHAUST
a - | . ‘E ‘pr | - 'E
— DE-ENERGIZED: ENERGIZED
FIGURE 1.
MANUAL OPERATOR (Optional) ad to Figure 5)
DESCRIPTION:
Valves with Suffix “MO” after catalog number are provided v with a
manual operator which allows manual operation when desired, or
— during an interruption of electrical power.
OPERATION:
To actuate valve manually, turn manual operator clockwise to stop.
Valve will now be in same position as when solenoid is energized.
— For valve to. operate electricaliy manual operator must be turned
counter clockwise to stop.
BULLETIN
8344
| SPEED/FLOW CONTROL — METERING DEVICES
(Refer to Figure 2)
— Speed/Flow Control Valves (2) may be added to aliow full unrestricted
flow in one direction and controlled flow in the opposite direction.
These valves must be located in the “A” and/or 'B” cylinder piping,
between the solenoid valve and the cylinder.
ВЕ IMPORTANT:
— NOTE: Do not instal! the speed control or any other restrictive devices
in either the pressure (inlet) connection, or the exhaust (outlet) connec-
tion, of the valve. Restricting either of these lines may cause valve
malfunction. |
INSTALLATION -
Check nameplate for correct catalog number, pressure, voltage and
POSITIONING
—. Valve may be mounted in any position.
PIPING | (Refer to Figure 3)
: Connect piping to the pressure, exhaust, and cylinder ports according
~ to flow diagram. Apply pipe compound sparingly to male pipe threads
only; if applied to valve threads, it may enter valve and cause opera-
~ tional difficulty. Pipe strain should be avoided by proper support and
- alignment of piping. When tightening pipe, do not use valve as a lever.
… IMPORTANT: For protection of the solenoid valve, install a strainer or
~ filter suitable for the service involved in the inlet side as close to the
~ valve as possible. Periodic cleaning is required, depending on the service
conditions. See Bulletins 8600, 8601 and 8602 for strainers.
To insure operation of the valve, the pressure and exhaust lines must be
— full area without restriction and a minimum differential pressure as
‘stamped on the nameplate must be maintained between the pressure
and exhaust at the moment of changeover. Hydraulic pumps or air
reservoirs must have adequate capacity to maintain the minimum pres-
‘sure during changeover. To check pressure during changeover, install a
‘gage in the pressure connection, close to the valve, as shown.
CYLINDER CYLINDER
“e -
WIRING DIAGRAM
{FOR SINGLE SOLENOID)
À
POWER LINE
| METERING KNOB/STEM PRESSURE GAUGE LOCATION FULL SIZE PIPING WITH-
(SUB - ASSEMBLY) —% (A MINIMUM PRESSURE OF 10 OUT RESTRICTIONS MUST
LOCKING PAWL P.S.1, ON AIR AND WATER AND Es BE USED ON PRESSURE
25 P,S.1. ON OIL MUSTBE PRESSURE EXHAUST AND EXHAUST LINES
BONNET STEM GASKET | MAINTAINED) °Р' CE
-BODY GASKET (O RING) | | a
('O' RING) 7 - SPRING FIGURE 3.
ДОР VALVE BODY I
NE LL DISC WIRING
Haba Ца y | (FLOATING) — Wiring must comply with Local and National Electrical Codes. For
— \ «фа ~ valves equipped with an explosion-proof, watertight enclosure (NEMA
FREE ree METERED
| Teva | LOW 4,7 & 9) the electrical fittings must be approved for use in the ap-
FLOW. | | proved hazardous locations. Housings for all solenoids are made with
| connections for 1/2 inch conduit. The General Purpose Enclosure
(NEMA 1) may be rotated to facilitate wiring by removing the retaining
re cap. After rotating to desired position, be certain to replace cap before
FIGURE 2. . operating | |
ASCO Valves | asco |
“ Form No. V-5453 R1 PRINTED IN US.A. 1973 _ Automatic Switch Co.
FLORHAM PARK, NEW JERSEY 07932
Cw
NOTE: Alternating Current (A-C) and Direct Current (DC) Solenoids |
are built differently. To convert from one to the other, it is necessary ВЕ
to change the complete solenoid, not Just the coil.
‘SOLENOID TEMPERATURE
Standard catalog valves are supplied with coils designed for continuous
duty service. When the solenoid is energized for a long period, the
solenoid enciosure becomes hot and can be touched by hand for only
_ an instant, This is a safe operating temperature. Any excessive heating
will be indicated by the smoke and odor of buming ¢ coil insulation. -
MAI NTENANCE
— WARNING: Tum off electrical power and line pressure to valve before Ш
making repairs, It is not necessary to remove valve from pipe line for
Tepairs. | |
CLEANING
A periodic cleaning of all solen oid valves is desirable. The time between |
cleanings will vary, depending on the media and service conditions. In
general, if the voltage to the coil is correct, sluggish valve operation or В
excessive leakage will indicate that cleaning à is required,
PREVENTIVE MAINTENANCE
1. Keep the medium flowing through the valve as free from dirt and
foreign material as possible.
À While in service, operate the valve at least once a month to insure: ©
proper opening and closing.
3. Periodic inspection (depending on media and service conditions) |
of internal valve parts for damage or excessive wear is recommended.
Thoroughly clean all parts. Replace any parts that are worn or
damaged.
IMPROPER OPERATION
I 1, Faulty Control Circuit: Check the electrical system. by energizing
the solenoid. A metallic click signifies the solenoid is operating. |
Absence of the click indicates loss of power supply. Check for loose
or blown-out fuses, operrcircuited or grounded coil, broken lead
wires or splice connections. |
2. Burned-Out Coil: Check for open-cricuited coil. Replace coil if
necessary,
3, Low Voltage: Check voltage across the coil leads. Voltage must be -
at least 85% of nameplate rating.
4. Incorrect Pressure: Check valve pressure at the solenoid valve; Pres-
sure to the valve must be within the range indicated on the name-.
plate. Flow must be adequate to maintain a minimum differential to
“allow valve to transfer. (See Pressure Limitation on Nameplate)
5. Excessive Leakage: Disassemble valve and clean all parts and pas- —
sageways. Replace worn or damaged parts with a ‘complete “Spare
Parts Kit” for best results.
COIL REPLACEMENT (Refer to Figure 4)
Turn off electrical power, disconnect coil lead wires,
CAUTION: The solenoid must be fully reassembled as the housing is
— Part of, and completes the magnetic circuit. Be careful to place in
- sulating washers at each end of the coil if required.
LL Remove retaining cap, nameplate and solenoid cover.
2, Slip yoke containing coil, sleeves and insulating washers off the .
|. Solenoid base sub-assembly. NOTE: Insulating washers are omitted
‘when a molded coil is used. In some D-C Constructions, a single flux
plate over the coil replaces yoke, sleeves and insulating washers.
3 Reassemble in reverse order of disassembly. |
| A SCO Valves
| | Automatic Switch Co.
' VALVE DISASSEMBLY
Depressurize valve and tun off electrical power. -
“ L ‘Solenoid may be removed intact by loosening and removing solenoid
| VALVE REASSEMBLY
1, Clean all parts and passageways thoroughly.
FLORMAM PARK, NEW JERSEY 07932 Form No, V-5453 R 1 | В
{Refer to Figure 4)
— base sub-assembly from body.
2. Remove core spring, core assembly and body gasket respectively. |
3
. A 4-40 Machine Screw (provided in “Spare Parts Kits”) serves as a
— self-tapping screw to remove insert from body. Thread screw a few
"turns in thru hole located in the flat surface of insert. CAUTION:
Do not damage center hole (Pilot Orifice) in raised surface of insert.
— Remove insert by using a pair of pliers on the head of the screw.
4. Remove three gaskets from insert. Tag each as they are removed so
— that they can be reassembied in the same location. NOTE: Middle
~~ and lower gaskets have the same physical dimensions, however, the
lower gasket is made of a softer material. |
5. Remove lower disc holder assembly and lower disc spring.
6. Solenoid pilot is now completely disassembled and may be serviced.
7. Remove four (4) body screws and slip piston end body from piston.
8. Slide piston/shaft assembly out of body.
9. Remove four (4) ‘O’-ring gaskets, two (2) from piston end body
- counter bores and two (2) from body insert - one (1) from each end.
10. To disassemble piston/shaft assembly, insert brass rod in cross hole
~ of shaft (NOTE: Rod must be brass or other soft material so as not
to burr edges of hole). Unscrew piston nut. Remove piston nut
gasket, piston, body insert and min disc.
11. Remove two (2) ‘U° Shaped lip seals from piston.
+
12. Unscrew end cap/seat from main body. Remove two (2) O” -ring
gaskets from end cap/seat and main disc.
13. All parts and passageways are now accessible for cleaning or replace-
- ment. Replace worn or damaged parts with a complete “Spare Parts
Kit” f or best results, | | |
(Refer to Figure 4)
2. Reassemble parts in reverse order of disassembly. Parts should be
installed in same cavity that they were removed from. |
3. Lubricate all rubber parts with Dow Corning's Valve Seal or r equiva
- lent silicone grease.
a NOTE: Main discs must be assembled with “U cup lip seals facing c out
— (flat brass surface facing in). © сор shaped Ep seals on piston must
face out at each end.
- SPARE PARTS KITS
Spare Parts Kits and Coils are available for ASCO valves.
— Parts marked with an asterisk (*) are supplied in Spare Parts Kits.
ORDERING INFORMATION
FOR SPARE PARTS KITS |
When Ordering Spare Parts Kits or Coils
В ‘Specify Valve Catalog Number,
Serial Number and Voltage,
PRINTED IN US.A. | 1973
a rigid] ]
EE pren ce
| | a ВЕ / a Drum - В
В SOLENOID HOUSING/COVER | a '
-SLEEVE —
— INSULATING WASHER |
(OMITTED WHEN A MOLDED ~~
| <a o COL IS USED) |
| x dco
: |
o SOLENOID (ES iA WAR |
778 DIAMETER HOLE FOR HOUSING! a TS 3 WASHER.
я CONDUIT Emo RS Fo Cor isuse A -
| a a, —=— SLEEVE
FLUXPLATE AT Е > J В В
(THIS PART NOT USED | > 40 MACHINE SCREW +
oo ALL GONSTRUCTIONS Te XSOLENOID ese serves ‘AS A. SELF - TAPPING.
Se CORE: SPRING —|
CLOSED END PROTRUDES
FROM TOP OF CORE
% BODY GASKET (‘0" RING) —_—
3 UPPER INSERT GASKET — © В
INSERT —
| MIDDLE INSERT ©
| Se GASKET =
LOWER INSERT {
a ENT Ш
THESE. TWO INSERT ‘O° RING
GASKETS HAVE THE same |
PHYSICAL DIMENSIONS HOW-
. EVER THE LOWER GASKET IS |
: A SOFTER MATERIAL.
(SUB ASSEMBLY) | co
4 —CORE ASSEMBLY 38
SCREW TO REMOVE INSERT FROM
BODY. REMOVE SCREW FROM IN -
SERT BEFORE REASSEMBLING. )
EX HOLE FOR MACHINE SCREW
PILOT ORIFICE
© DO NOT DAMAGE
INSERT
— NDTE:
. “UPPER AND MIDOLE 0° RING GASKETS SNAP
IN GROOVES IN INSERT. LOWER ‘O' RING
GASKET FiTS BETWEEN RECESS IN LOWER
© CORNER OF INSERT AND LOWER CORNER OF О/
BOOY Pl LOT INSERT BORE.
LOWER E DISC | HOLDER ASSEMBLY *
| LOWER DISC SPRING *
- MAIN VALVE BODY
- CUP END MUST FACE our
Je ane SHAFT E
LL X о, Ve BODY INSERT ___ — AWAY FROM PISTON
- Lowa o RING GASKET SE} | /
Luce 0 > me cast 9 HR о INSERT “O” ANG *
| | —/ | WO / [a - |
INSERT BRASS ROD IN CROSS I _ _Y ÉL ve PISTON 'U' CUP LIP SEAL 36
‘HOLE IN SHAFT.TQ KEEP ERR UM 7 PISTON NUT GASKET %&
© SHAFT FROM TURNING WHEN | В, td o So NUT
‘REMOVING OR REPLACING PISTON NUT or ; 0).
© DO NOT DAMAGE SHAFT OR. CAUTION: + Ter ORIFICE ONLY PISTON END BODY
©. BURR EDGES OF HOLE, [SoM E APPLICATIONS USE AN CY ANG |
a o BACK-UP WITHIN. THE SMALL PISTON Е
|W CUP SEAL. SHOULD ONE OF THESE} .
| BE FQUND ON DISASSEMBLY, RE-USE | .
— [WHEN RE-ASSEMBLING, THIS PARTIS |
| | | ; {NOT SUPPLIED IN SPARE PARTS KITS. И
“X DENOTES PARTS INCLUDED strISTON END BODY ‘0’ RING GABKETS BODY SCREN/WASHER <q
IN SPARE PARTS KIT 2 REQUIRED) | (4 REQUIRED): UA
SR
BULLETIN No. 8344 - — Single Solenoid
| Figure 4. _ _V4- 3/8- 1/2- ыы 1 NPT. |
a MANUAL OPERATOR
To actuate valve manually, turn manual operator clockwise to stop.
Valve will now be in same position as when solenoid is energized.
For valve to operate electrically, manual operator must be turned о
| counterclockwise to stop.
MANUAL OPERATOR DISASSEMBLY
{Refer to Figure 5)
Depressurize valve and turn off electrical power.
1. Remove the solenoid intact by loosening and removing the solenoid о
— base sub-assembly from the manual operator body.
2. Remove core spring and solenoid base to manual operator body
‘gasket from manual operator body. |
3, Unscrew manual operator body from main valve + body. |
4. Slip retainer from lower manual operator body threads, then slide
manual. operator stem/lever assembly from manual operator body.
5. Remove O-Ring from manual operator stem/lever sub-assembly,
6. All parts are now accessible for cleaning and/or replacement. Re-
— place wom or damaged parts with a complete Spare Parts Kit for
best results.
MANUAL OPERATOR REASSEMBLY |
(Refer to Figure 5) | | |
1. Reassemble manual operator in reverse order of disassembly. N ote
| that the disc/ dise. holder sub-assembly and body gasket must be
a - installed in the pilot body cavity before e installing the manual opera-
tor body sub-assembly,
2. Pre-assemble the following manual operator body parts in the fol-
~ owing order to make up the manual operator body sub-assembly. u»
‘There is a captive spacing washer on the manual operator stem/lever C
— sub-assembiy. Locate this stem/lever spacer on the inside or outside
of the retainer fork as follows:
о A. All cores with an outside diameter up to 13/32” (.406 dia), the
spacer must be located inside the retainer fork.
B. All cores with an outside diameter greater than 13/32” (406
dia), the spacer must be located outside the retainer fork,
3, Having installed the stem gasket on the stem and correctly deter
— mined the proper location of the spacer, slip the stem assembly into
the manual operator body and slide the retainer up over the lower
- threads engaging the stem/lever sub-assembly. | |
| 4. Screw manual operator body sub-assembly into main body.
5. Turn manual operator lever to the 9 o’clock position, i.e. this is the
same position that the operator would be in if the valve was to be
operated electrically.
6. Install the solenoid base to manual operator body gasket. Slide ¢ core
onto the disc/disc holder sub-assembly, Install core spring,
7. Reinstall solenoid base sub-assembly complete with solenoid.
SOLENOID BASE |
(SUB ASSEMBLY)
ОЖ CORE SPRING ———
(CLOSED END PROTRUDES
FROM TOP OF CORE)
6 CORE -
- ES SOLENOID BASE TO
RETAINER —
3 DISC/DISC HOLDER — -
(SUB ASSEMBLY) |
3 BODY GASKET -
TORING)
— STEM GASKET 36
(O RING)
-STEM/LEVER #
su: ASSEMBLY)
SPACER
28. VE PART) |
TE
FULL SIZE
13/32" DIAMETER
CIRCLE TEMPLATE
Ш Automatic Switch Co. +
FLORHAM PARK. NEW JERSEY 07
SPACER LOCATION SPACER LOCATION | (406 DIAL) |
(WITH CORES — (WITH CORES GREATER o
| ЮР то 13/32" DIA.) THAN 13/32” DIA.)
3 DENOTES PARTS INCLUDED © STEM/LEVER SUB- ASSEMBLY TT, C
IN SPARE PARTS KIT | (SIDE VIEW). o o EE
- Figure 5. _ MANUAL OPERATOR |
JASCO Valves a o |
Form No, V5453R1 - — PRINTEDIN US TN 1973.
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