Parker C6, C7 Service Manual

Pneumatic Division North America

Richland, Michigan 49083

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.

Installation & Service Instructions
V-227D

C6 & C7 Series Valves
ISSUED: September, 2000

Supersedes: February, 1994

ECN# P27805

CAUTION:

!

Foot operated valves must be protected against inadvertent
operation that can cause serious bodily injury. Use of a pedal
guard (PS2043P) is strongly recommended, as it will reduce
the likelihood of inadvertent operation. If this is not suitable in
your application, utilize equivalent protection.

V alve Operation:

These valves will operate mounted in an y position.
Valv es can be operated either Normally Closed to pressure or Normally

Open to pressure.
In the normal position of the stem (spring retur ned), Port “A” is

blocked and P o rt “O” is connected to Port “B”. When actuated by the
foot, P ort “A ” is connected to Port “O” and P ort “B” is blocked. When
the non-locking foot pedal is released, the spring returns the stem to
its normal position. In the locking model, the operator must release
the locking pedal to return the stem to its original (normal) position.

Connect inlet to Port “A” f or normally closed valve. Port “B” is e xhaust.
Connect inlet to Port “B” f or normally open v alve . Port “A” is e xhaust.
Plug exhaust port for 2-way oper ation.

Application Limits

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

Operating Pressure Range:

psig Bar kPa
Minimum 0 0 0
Maximum 15 0 10 1000

Operating Temperature Range:

0°F to 160°F (-18°C to 71°C)

Installation & Operating Instructions

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 into the f emale 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.

Filtered and lubricated air is necessary for maximum valve life and
minimum maintenance.

Factory Pre-Lubrication - All valv es are pre-lubricated at assembl y
with a petroleum based grease.

CAUTION:

!

This valve shall NO T be used to actuate a punch press. Do NOT
use this valve on punch presses or press brakes. See OSHA

1910.217.

Port Identifications / Connections

OO

➤

➤

➤

➤

AB

AB

C6 Non-Locking

Normally Closed

OO

➤

➤

➤

A

C6 Non-Locking

Normally Open

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.

B

WARNING

!

➤

➤

AB

C7 Locking

Normally Closed

➤

➤

AB

C7 Locking

Normally Open

Service Procedures

To disassemble unit, use the following procedure:
Remove fasteners anchoring foot base assembly. (The base

can be removed from the body by removing 4 pan head screws
using a Philips screwdriver.) To remove the stem, stem guide,
and seals from the body, unscrew the end plug using a 3/8"
Allen wrench. Gently press on the “pin” side of the stem until it
slides out of the body. The stem guide may be removed by
pulling axially on the radial holes drilled in the stem guide. Be
careful not to scratch the sealing surfaces or cut the seals.

Thoroughly clean the valve body bore and stem guide, and
inspect for possible nick s, scratches and material imperfections.
Lightly lubricate the stem seals. (Use a non-detergent hydro­carbon based oil or grease.) Replace any o-rings or other
seals if they are damaged.

The Assembly procedure is the reverse of the above. Tighten
the end plug to 60 in-lbs and apply 15-18 in-lbs of torque to
the pan head mounting screws. Re-attach the base.

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

Maintenance & Trouble Shooting Hints:

Air Leakage Through Exhaust Ports:

1. Check for internal leakage in cylinder being operated by
valve.

2. Check center stem seal for nicks, cracks, peeling and/or
delamination.

3. Check for missing, damaged, swollen, or incorrectly
assembled o-rings and gaskets.

4. Check stem guide and body bore for nicks, scratches,
and dirt par ticles.

Replace worn or damaged parts. Re-assemble and re-test
unit.

Service Kit and Parts Av ailab le

Valve Body Service Kit:

(consists of items # 3, 4, 5, 7, 8, & 9) PL502500

Valve Body Assemblies:

C25 (1/4" NPTF Ports) PL2234
C37 (3/8" NPTF Ports) PL2238

Base Assemblies:

Non-Locking PL2224
Locking PL2225

Part Identification List

Item # Description

1 Valve Body Assembly
2 Valve Body
3 Stem Retainer Snap Ring
4 Stem O-ring
5Stem
6 Stem Guide
7 Stem Guide Gasket
8 Stem Guide O-ring

9 Stem Return Spring
10 End Plug
11 Base Assembly (Non-Locking)
12 Base
13 Treadle Pin
14 Treadle Pin Snap Ring
15 Treadle Spacer
16 Treadle
17 Base Assembly (Locking)
18 Base
19 Treadle Pin
20 Treadle Pin Snap Ring
21 Release Trigger
22 Treadle
23 Spring Latch (not shown)

V-227D

2

➤

➤

➤

➤

➤

3
4

5

➤

➤

➤

➤

➤

➤

6
7

1

4

➤

➤

➤

➤

➤

➤

➤

➤

8
9

10

12

➤

13

➤

➤

➤

➤

14

11

15
16

➤

➤

Non-Locking Base Assembly Locking Base Assembly

18

➤

19

➤

➤

20

➤

21

17

22