Wilkerson P12 User Manual [en, es, fr]

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Richland, MI 49083 Tel: [phone]

Installation & Service Instructions
83-956-000

1/4" and 3/8" R12 Regulator, and
1/4" and 3/8" P12 Precision Regulator

ISSUED: May, 2005
Supersedes: September, 2002

Doc.# 83956000, ECN# 050500, Rev. 4

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.

! WARNING

Product rupture can cause serious injury.

Do not connect regulator to bottled gas.

Do not exceed maximum primary pressure rating.

Introduction:

Follow these instructions when installing, operating, or servicing
the product.

Installation

1. The regulator should be installed with reasonable
accessibility for service whenever possible - repair service
kits are availab le. K eep pipe and 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 into the female port. Do not use
PTFE tape to seal pipe joints - pieces have a tendency to
break off and lodge inside unit, possibly causing malfunction.

2. Install regulator so that air flow is in the direction of arrow.
Installation must be upstream (high pressure) side and as
close to the devices it is to service (valve, cylinder, tool,
etc.). Mounting may be in any position.

3. Gauge ports are located on both sides of the regulator
body for your con v enience. It is necessary to install a gauge
or pipe plugs into each port during installation.

4. For protection against rust, pipe scale, and other foreign
matter, install a filter on the upstream (high pressure) side
as close to the regulator as possible.

Operation

1. Before turning on the air supply, turn the adjusting knob
counterclockwise until compression is released from the
control spring. Then turn on air supply and adjust regulator
to desired secondary pressure by turning adjusting knob
clockwise. This permits pressure to build up slowly,
preventing an y une xpected operation of the v alv e , cylinders,
tools, etc., attached to the line. Adjustment to desired
secondary pressure can be made only with primary pressure
applied to the regulator.

2. To decrease regulator pressure setting, always reset from a
pressure lower than the final setting desired. For example,
lowering the secondary pressure from 550 to 410 kPa (80
to 60 psig) is best accomplished by dropping the secondary
pressure to 350 kPa (50 psig), then adjusting upward to
410 kPa (60 psig). Push the adjusting knob down to lock
the pressure setting.

Application Limits

WARNING

These products are intended for use in general purpose
compressed air systems only.

kPa PSIG bar

Maximum Inlet Pressure 1734 250 17.3

Ambient Temperature Range: 0°C to 80°C (32°F to 175°F)

ANSI Symbols

Relieving Regulator

Adjustable

Non-Relieving Regulator

Adjustable

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE
PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR RELA TED
ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY
DAMAGE.

This document and other information from The Company, 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 The Company 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.

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1/4" and 3/8" R12 Regulator, and 1/4" and 3/8" P12 Precision Regulator 83-956-000

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Service

CAUTION:

SHUT OFF AIR SUPPLY and exhaust the primary and
secondary pressure before disassembling regulator unit.
(Turning the knob counterclockwise reduces regulator’s
setting, but does not vent downstream pressure on non­relieving regulators.)

CAUTION:

Lubricate parts with a mineral based oil / grease or silicone free
grease. DO NOT use synthetic oils / greases such as esters.

A. Use the following procedure to service Diaphragm and

/ or Control Spring:

1. Disengage the adjusting knob by pulling upward. Turn
adjusting knob counterclockwise until the compression is
released from the pressure control spring.

2. Unscrew the threaded collar and remove the bonnet
assembly. Next, disassemble, clean, and carefully inspect
parts for wear and/or damage. If replacement is necessary,
use parts from service kits.

3.

Lubricate o-ring and lip seals with grease (supplied with kits).

4. Install diaphragm assembly into bonnet. Then install bonnet
assembly to body and tighten threaded collar per Figure 1.

B. Servicing the Valve Assembly-

1. Exhaust system air pressure as previously described. Then
remove bottom cap by unscre wing it from body. Next, remov e
valve assembly, o-ring, cap o-ring and valve return spring.

2. Next, disassemble, clean, and carefully inspect parts for
wear and/or damage. If replacement is necessary, use parts
from service kits.

3. Lubricate o-ring and sliding surfaces using grease supplied
with service kit.

4. Install parts as shown in Figure 1.

5. Lubricate cap o-ring and install it in o-ring groove on cap.
Then screw cap into body until the cap bottoms out in body
(See Figure 1).

6. Turn on air supply and adjust to desired secondary pressure
as described in the Operation section.

Turn on air pressure and check regulator for leakage. If leakage
occurs, DO NOT OPERATE — conduct repairs again.

If you have questions concerning how to service this unit, contact
your local authorized dealer or your customer service representative.

Service Kits Available

Description R12 P12

Air Pilot Conversion
(Relieving)

Bonnet Assembly RRP-96-308 —
Gauges:

Low Pressure RRP-96-664 RRP-96-664
0 to 414 kPa (0 to 60 PSIG)

Low Pressure
0 to 207 kPa (0 to 30 PSIG)

Standard Pressure

0 to 1103 kPa (0 to 160 PSIG)
Mounting Bracket Kit GPA-96-313 GPA-96-313
Regulator Control Knob RRP-96-300 —
Springs:

862 kPa (125 PSIG) RRP-96-301 RRP-96-301

414 kPa (60 PSIG) RRP-96-302 RRP-96-302

206 kPa (30 PSIG) RRP-96-303 RRP-96-303

1379 kPa (200 PSIG) RRP-96-304 RRP-96-304
Non-Relieving

Regulator Repair Kit*
Relieving Regulator

Repair Kit*

*Grease in kit is silicone free

Knob

Collar
(Hand tight
plus 1/4 turn)

Bonnet

Washer
Adjusting Screw

Drive Nut

GRP-96-350 —

RRP-96-663 RRP-96-663

RRP-96-665 RRP-96-665

RRP-96-307 —

RRP-96-306 RRP-96-305

Control Spring

Diaphragm Assembly
(Includes Upper Diaphragm Plate
& Lower Diaphragm Plate)

O-Ring,
Vent Seal
(Not used on 27RC)

Body

Valve
Assembly

O-Ring,

Lightly grease with provided lubricant.
Inspect for nicks, scratches, and surface

imperfections. If present, reduced service
life is probable and future replacement
should be planned.

Clean with lint-free cloth.

Figure 1:

Bottom Cap
Spring,

Valve Return
Bottom Cap

Torque:

2.3 to 2.8 Nm
(20 to 25 in. lb.)

R12 and P12

Regulators