Parker Pneumatic 250B Series Installation and maintenance instructions

Pneumatic Division
Richland, Michigan 49083
Installation & Service Instructions:
V595P
Auto 250B Series Valves
ISSUED: December, 2003
Supersedes: None
Doc.# V-595P, ECN# 030893, Rev. 1
Introduction
Follow these instructions when installing, operating, or servicing the
product.
Application Limits
These products are intended for use in general purpose compressed
air systems only.
Operating Pressure Range: kPa PSIG bar
Minimum* 240 35 2.41
Maximum 1030 150 10.3
* For lower pressure or vacuum operation, solenoid(s) may be
externally piloted (35 PSIG min.) following the conversion
procedure in these instructions.
Ambient Temperature Range: -18°C to 52°C (0°F to 125°F)
Voltage Range: +10%, -15% of Rating
Installation & Operating Instructions
CAUTION: Solenoid versions of this valve contain solid state
components that can be damaged by transient voltage spikes,
over-voltage or high temperature. To protect against premature
solenoid failure, please read and adhere to the following:
1. If this solenoid operated valve is used in a circuit with other
inductive loads, the solenoid should be electrically protected
with a voltage suppression device (e.g. transient voltage
suppressor or varistor) that has a minimum rating of 1.6 times
the rated voltage of the solenoid valve and sufficient capacity to
dissipate the energy of other inductive loads.
2. Valve should be installed with reasonable accessibility for service
whenever possible - repair service kits are available. Keep pipe
or tubing lengths to a minimum with inside clean and free of dirt
and chips. Pipe joint compound should be used sparingly and
applied only to the male pipe - never to the female port. Do not
use PTFE tape to seal pipe joints - pieces have a tendency to
break off and lodge inside the unit possibly causing malfunction.
CAUTION: It is recommended that double solenoid and double
remote air pilot operated 2-Position valves be mounted so
that the axis of the valve spool is in the horizontal plane. The
valve may be rotated 360° around the axis for mounting
convenience.
!
CAUTION: An interruption of 10 milliseconds or greater to the
power supplied to the solenoid of a solenoid operated valve
may cause the valve to shift. Provision must be made to prevent
power interruption of this duration to avoid unintended,
potentially hazardous, consequences.
Lubrication
All valves are pre-lubricated at assembly with a petroleum based
grease. Filtered and lubricated air is necessary for maximum valve
life and minimum maintenance. If in-service lubrication is used, F442
oil is recommended. This oil is specially formulated to provide peak
performance and maximum service life from all air operated equipment.
Otherwise, use a straight paraffin base mineral oil of viscosity 100-
200 SSU @ 100°F and an aniline point greater than 200°F.
NOTE: Once in-service lubrication is initiated, the practice should be
continued in order to maximize valve life.
CAUTION: Do not use synthetic, reconstituted, or oils with an
alcohol content or detergent additives.
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF
THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR
RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND
PROPERTY DAMAGE.
This document and other information from Parker Hannifin Corporation,
its subsidiaries and authorized distributors provide product and/or
system options for further investigation by users having technical
expertise. It is important that you analyze all aspects of your application,
including consequences of any failure and review the information
concerning the product or systems in the current product catalog. Due
to the variety of operating conditions and applications for these products
or systems, the user, through its own analysis and testing, is solely
responsible for making the final selection of the products and systems
and assuring that all performance, safety and warning requirements
of the application are met.
The products described herein, including without limitation, product
features, specifications, designs, availability and pricing, are subject
to change by Parker Hannifin Corporation and its subsidiaries at any
time without notice.
EXTRA COPIES OF THESE INSTRUCTIONS ARE AVAILABLE FOR
INCLUSION IN EQUIPMENT / MAINTENANCE MANUALS THAT UTILIZE
THESE PRODUCTS. CONTACT YOUR LOCAL REPRESENTATIVE.
WARNING
To avoid unpredictable system behavior that can cause personal injury
and property damage:
• Disconnect electrical supply (when necessary) before installation,
servicing, or conversion.
• Disconnect air supply and depressurize all air lines connected to
this product before installation, servicing, or conversion.
• Operate within the manufacturer’s specified pressure, temperature,
and other conditions listed in these instructions.
• Medium must be moisture-free if ambient temperature is below
freezing.
• Service according to procedures listed in these instructions.
• Installation, service, and conversion of these products must be
performed by knowledgeable personnel who understand how
pneumatic products are to be applied.
• After installation, servicing, or conversion, air and electrical
supplies (when necessary) should be connected and the product
tested for proper function and leakage. If audible leakage is present,
or the product does not operate properly, do not put into use.
• Warnings and specifications on the product should not be covered
by paint, etc. If masking is not possible, contact your local
representative for replacement labels.
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4. Reassemble unit by reversing the order by which it was
disassembled. See valve servicing for proper assembly
techniques and screw torque.
Figure 1
Maintenance & Trouble Shooting Hints
Valve Not Shifting Completely When Energized:
1. Check to insure that the proper voltage is supplied to the
solenoids.
2. Check to insure that supply pressure is 240 kPa (35 PSIG) or
greater at the valve’s inlet when shifting valve.
3. Check for possible restrictions in air supply, such as undersized
hoses, fittings or quick disconnects.
4. Check to insure that the spool moves smoothly.
5. Check spool seals for proper installation, dirt or damage.
Air Leakage Through Exhaust Ports:
1. Check for internal leakage in the cylinder being operated by
the valve.
2. Check condition of the spool seals for proper alignment,
damaged (nicked or broken) seals, and dirt contamination.
3. Inspect the solenoid plunger guide, plunger, spring and seat
(as well as their mating parts) for dirt, nicks, or damage.
4. Check for missing, damaged, or incorrectly assembled
o-rings and gaskets.
Noisy Solenoids:
1. Check to insure that voltage and pressure supplies are
adequate.
2. Inspect the plunger guide, plunger, spring, and seat (as well as
their mating parts) for dirt, nicks, or damage.
Replace worn or damaged parts. Reassemble and retest unit.
Plunger & Guide Assembly
(Includes Plunger, Plunger Guide and Spring)
K232 025 Standard Voltages
K232 049 B9 Low Watt Voltage Code (Blue Coil)
Seal Oriented To Provide
External Pilot Supply
Internal
Pilot Supply
External
Pilot Supply
Valve
Spool Bore
Valve Body
With Solenoid
Block Removed
Auto 250 Series Valves V-595P
Wiring Instructions
Units with 3-Pin, 4-Pin or 5-Pin connectors
Pin numbers as viewing face of male receptacle.
Option 3 Option 4 Option 5 Option 6 3-Pin Male
SAE J2051 General Chrysler 4-Pin Male Connector
Motors Connector
Pin Function Function Function Function Function
no.
1 Sol B Sol A Sol A — Ground
2 Sol A Sol B Sol A Sol A Sol B
3 Ground Ground Ground Common Sol B
4 Sol A Sol B Sol B Sol B —
5 Sol B Sol A Sol B — —
Note: Solenoid B is wired for single solenoid valves. Option Number
is seventh digit of the Model Number.
Units with flying leads
Use red wires for solenoid ’A’. Use blue wires for solenoid ’B’.
Earth ground: All electrically operated valves (except 24VDC low
watt) must be provided a proper earth ground. Connect through proper
lead in connector or to green wire from valve.
NOTE: In addition to the above instructions, follow all requirements
for local and national electrical codes.
Field Conversion of Pilot Supplies
(Internal vs. External)
!
CAUTION: Turn air and electrical supplies off before servicing
unit.
1. Remove valve from base, if required.
2. Remove (4) screws which fasten solenoid block or end cap to
body at both A and B ends.
NOTE: Valve body has two pilot holes (internal and external). The internal
pilot hole is located nearest to valve spool bore (Figure 1).
3. To select external supply, install seal in its recess in the body
with the projection on backside of seal plugging the internal
supply hole. To select internal supply, install seal as above but
with the projection plugging the external supply hole.
NOTE: The selection of seal positioning must be the same at both A and B
ends.
1
2
5-Pin
3
4
5
4-Pin
1
2
34
3-Pin
23
1
Coil Replacement Chart
Voltage Coil
60 Hz 50 Hz D. C. WithLight
— — 24 (B9)* K252023
120 110 — K252019
* Low Watt with Surge Suppression (Blue)
BA
EB EA
P
SOL. B
BA
EB EA
P
SOL. ASOL. B
BA
EB EA
P
PB
Single Solenoid
Single Remote
Double Remote
Double Solenoid
2-Position
Blocked Center
Pressure Center
Exhaust Center
3-Position
BA
EB EA
P
PB PA
BA
EB EA
P
SOL. ASOL. B
BA
EB EA
P
SOL. ASOL. B
BA
EB EA
P
SOL. ASOL. B
ANSI Symbols
2

Auto 250 Series Valves V-595P
AB
P
AB EJNM
Q C D
FHGK & L
#12
END
#14
END
P
A
B
P
GK & L
QC
#12
END
#14
END
P
AB
P
ABSR
FGTG K & L
QC D
#12
END
#14
END
M
DD
F
M
Service Procedures
!
CAUTION:Turn air and electrical supplies off before servicing
unit. When servicing this valve equipped with solenoid
operators, note that the solenoid adapters are permanently
wired to the body. Handle the disassembled valve with care to
avoid damage to the wiring harness and solenoid adapters.
NOTE: All cleaning of parts to be done with mineral spirits or equivalent
cleaning solution. All parts showing nicks, scratches or other signs
of wear or damage should be replaced.
Valve Service
Use Service Kit K352419 for single operator, use Service Kit K352420
for double operator.
1. Remove valve body assembly with interface block from base.
2. Orient valve with 14 end on the left hand side.
3. Remove (4) socket head screws (A) out from each end. (Be
sure to start on left hand side for single operated valves, to
prevent end spacer and spring from popping out end of valve.)
4. Remove solenoid block (B), end cap (E), bumpers (C), and
square seals (D) or o-rings (DD). Discard square seals or
o-rings.
5. Remove spool or spool assembly (F), end spacer (G), with
spring (H) (single solenoid valves only).
6. Single Operated Valves Only - Remove and discard u-cup (J)
from spool assembly. Clean spool assembly. From kit, use grease
from tube to lubricate the new u-cup and assemble to spool
assembly (open end away from spool).
7. Remove end spacer (G), o-rings (K & L), spacers (M), and
spacer ring (N) (where applicable). Discard o-rings. Clean
spacers.
8. Apply grease to inner and outer o-rings (K & L).
9. Reassemble one end spacer (G), a set of o-rings (K & L), and
one spacer (M). Alternatively assemble a set of o-rings and a
spacer until all o-rings and spacers are installed. Press each set
firmly into place.
10. Reassemble second end spacer (G) on double operator,
2-Position valves.
11. On right end of valve, assemble square seal (D) or o-ring (DD)
(3-Position valves only), bumper (C), solenoid block (B), end
cap (E), and (4) socket head screws (A). Tighten screws 5.0 to
5.6 Nm (45 to 50 in-lbs).
12. Assemble spring (H) (where applicable), and spool or spool
assembly (F).
13. Repeat step 8 for left end of valve.
14. Reassemble valve onto base and tighten mounting screws 9.0
to 10.2 Nm (80 to 90 in-lbs).
Service Solenoid Coil
1. Remove nut (P) which secures solenoid coil in place. Slide coil
off of the plunger guide.
2. Remove paper backing from gasket provided in kit to expose
adhesive surface. Align and attach gasket to new solenoid coil.
3. Slide new coil onto plunger guide and install nut on guide with
bearing face toward the coil or diffuser nut and muffler plug and
tighten 5.1 to 6.2 Nm (45 to 55 in-lbs).
Servicing Solenoid Plunger Assembly
1. Remove the nut (P) which secures the solenoid coil to the plunger
guide assembly. Then slide coil off of the plunger guide. Unscrew
the plunger guide and remove plunger, spring, and
o-ring (Q).
2. Using a clean, lint free cloth, clean plunger guide, plunger, spring,
and seat (which is permanently mounted in the adapter block).
Replace plunger guide assembly if necessary.
3. Grease o-ring and place at bottom of threaded bore. Very lightly
grease plunger. Reassemble plunger and spring into plunger
guide. Screw plunger guide into adapter block and tighten
5.6 to 6.8 Nm (50 to 60 in-lbs).
4. Slide coil onto plunger guide and then screw nut onto plunger
guide and tighten 5.1 to 6.2 Nm (45 to 55 in-lbs).
Manual Override Service
Use PS1725 Service Kit for Non-Locking Override.
1. Reference: Double Solenoid, 2-Position Valve illustration below.
2. Remove retainer (R) with 1/4" hex key, withdraw override stem
with seals (S) and spring (T). Discard parts.
3. Inspect and remove any debris which may be present in hole in
solenoid adapter.
4. From kit, place spring in hole.
5. Install stem with o-rings in solenoid adapter. O-rings must be
coated with grease, prior to stem installation.
6. Install threaded retainer - tighten 4.5 to 5.6 Nm (40 to 50
in-lbs).
Double Solenoid, 3-Position Valves Single Solenoid, 2-Position Valves
Double Solenoid, 2-Position Valves
3