SECTION 1: MANDATORY MAINTENANCE NOTES
THESE NOTES AND INSTRUCTIONS MUST BE
PRECISELY FOLLOWED FOR ANY MAINTENANCE OF
PARKER P-SERIES BELLOWS VALVES.
DISASSEMBLY OF BELLOWS VALVES:
1.
WARNING: MAKE CERTAIN THE SYSTEM IN WHICH
THE VALVE IS INSTALLED IS DRAINED AND/OR
EXHAUSTED OF ALL PRESSURE BEFORE STARTING
VALVE REMOVAL OR DISASSEMBLY. FAILURE TO
DO SO CAN CAUSE DEATH, PERSONAL INJURY AND
PROPERTY DAMAGE.
2. Verify that the Bellows Valve Maintenance Kit being used
is appropriate for the Valve's size and service
requirements. Always contact your authorized Parker
representative if any questions arise.
REASSEMBLY OF BELLOWS VALVES:
1. Make certain all parts are free of dirt or other
contamination before starting reassembly of the Valve.
2. Any instruction to lubricate any Valve component assumes
the End User will select a lubricant that is consistent with
the Valve's service requirements. Always contact your
authorized Parker representative if any questions arise.
Table I
Maximum Allowable Working Pressure and Temperature
Bellows Valve Model
Max Allowable Working
Pressure and Temperature
Air Supply Pressure
50 - 150 psig
(0.3 MPa to 1.0 MPa)
Normally Open
600 psig at 70° F
(4.1 MPa at 21° C)
Normally Closed
200 psig at 70° F
(1.4 MPa at 21° C)
Double Acting
700 psig at 70° F
(4.8 MPa at 21° C)
PARKER
P6 and P8 Series Miniature Actuator
Bellows Valve
Maintenance Instructions
MI-132
Parker Hannifin Corporation
Veriflo Division
250 Canal Blvd.
Richmond, Ca 94804
Phone (510) 235-9590
Fax (510) 232-7396
Copyright 1995 Parker-Hannifin Corporation
All Rights Reserved
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
and review the information concerning the product or
system 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.
ALL
PARKER VALVES MUST PASS A RIGID
OPERATIONAL AND LEAKAGE TEST BEFORE
LEAVING THE FACTORY. IT IS RECOMMENDED AFTER
ANY REASSEMBLY, THE VALVE SHOULD BE TESTED
BY THE USER FOR OPERATION AND LEAKAGE. IF
THESE INSTRUCTIONS ARE NOT FULLY COMPLIED
WITH, THE REPAIRED PRODUCT MAY FAIL AND
CAUSE DAMAGE TO PROPERTY OR INJURY TO
PERSONS. PARKER HANNIFIN CANNOT ASSUME
RESPONSIBILITY FOR PERFORMANCE OF A
CUSTOMER SERVICED VALVE.
2C: BELLOWS SUB-ASSEMBLY REPLACEMENT
DISASSEMBLY
1. Remove the Air Operator Cap from the Actuator Body using a
3/16 inch hex socket wrench.
2. Remove the Piston by first removing the Snap Ring from the
upper portion of the stem.
3. Remove the Bonnet Sub-assembly by unthreading the Union
Nut with a 1 inch hex socket wrench.
4. Remove the Gasket from the Valve Body.
5. Remove the Stem Sub-assembly from the Bonnet Sub-
assembly.
6. Remove the O-ring/Bushing/Spring from the Stem Sub-
assembly.
7. Remove the Stem Tip Sub-assembly from the Stem Sub-
assembly by unthreading with a 7/16 inch hex socket wrench.
A screw driver slot on the stem can be used to prevent rotation
of the Stem Sub-assembly. Do not hold the Bellows or the
Bellows Ring to prevent damage to the Bellows.
REASSEMBLY
1. Engage the Stem Tip Sub-assembly into the new Stem Sub-
assembly to 1/8 turn past finger-tight or preferably torque to 15
In-lbs.(1.7 N-m). Rotate the Stem Tip Sub-assembly with a
7/16 inch hex socket wrench. A screw driver slot on the stem
can be used to prevent rotation of the Stem Sub-assembly.
Do not hold the Bellows or the Bellows Ring to prevent
damage to the Bellows.
2. Insert the Bushing and Spring over the Stem Sub-assembly.
3. Install the assembly of step 2 into the Bonnet Sub-assembly.
Exercise caution to prevent damage to the O-rings.
4. Place the new Gasket onto the Valve Body.
5. Lightly lubricate the Valve Body or Union Nut threads with an
appropriate lubricant, as consistent with the Valve's service
requirements.
6. Engage the Bonnet Sub-assembly onto the Valve Body finger
tight.
7. Insert the O-ring and Piston onto the Stem Sub-assembly and
secure the Piston with the Snap Ring.
8. Engage the Actuator Cap into the Actuator Body.
9. Preferably, pressurize the Bonnet Sub-assembly at the 10-32
UNF port in the Body to open the valve prior to the following
step.
10. Install the Bonnet Sub-assembly and torque the Union Nut to
50 Ft-lbs. (67 N-m) maximum.
FIGURE 1:
NORMALLY CLOSED VALVE
(P6 AND P8-12AC)
FIGURE 2:
NORMALLY CLOSED VALVE
(P6 AND P8-12AC)
SPRING
BUSHING
O-RING
ACTUATOR
CAP
STEM
SUB-ASSY
STEM TIP
SUB-ASSY
O-RING
SNAP RING
PISTON
O-RING
ACTUATOR
BODY
UNION
NUT
BONNET
VALVE
BODY
BUSHING &
RETAINING RING
GASKET
O-RING
BONNET
SUB-ASSY
SECTION 2: NORMALLY CLOSED VALVE
(P6 and P8 -12AC)
For NORMALLY CLOSED VALVES (P6 & P8-12AC) refer to Figures 1 and 2.
2A:GASKET REPLACEMENT
DISASSEMBLY
1. Remove the Bonnet Sub-assembly by unthreading the Union Nut from the
Valve Body with a 1 inch hex socket wrench.
2. Remove the Gasket from the Valve Body.
REASSEMBLY
1. Place the new Gasket in the Valve Body.
2. Lightly lubricate the Body or Union Nut threads with an appropriate
lubricant, as consistent with the Valve's service requirements.
3. Preferably, pressurize the Bonnet Sub-assembly at the 10-32 UNF port in
the Actuator Body to open the valve for the following step.
4. Engage the Bonnet Sub-assembly onto the Valve Body and torque the
Union Nut to 50 Ft-lbs. (67 N-m) maximum.
2B: STEM TIP REPLACEMENT
DISASSEMBLY
1. Remove the Bonnet Sub-assembly by unthreading the Union Nut from the
Valve Body with a 1 inch hex socket wrench.
2. Remove the Stem Tip Sub-assembly from the Stem Sub-assembly by
unthreading with a 7/16 inch hex socket wrench. Insert a screw driver into
the 10-32 UNF port of the Actuator Cap to prevent rotation of the Stem
Sub-assembly. Do not hold the Bellows or the Bellows Ring to prevent
damage to the Bellows.
3. Remove the Gasket from the Valve Body.
REASSEMBLY
1. Engage the new Stem Tip Sub-assembly into the Stem Sub-assembly to
1/8 turn past finger-tight or preferably torque to 15 In-lbs. (1.7 N-m).
Rotate the Stem Tip Sub-assembly with a 7/16 inch hex socket wrench,
while securing the Stem Sub-assembly from rotation with a screw driver
inserted into the 10-32 UNF port in the Actuator Cap. Do not hold the
Bellows or the Bellows Ring to prevent damage to the Bellows.
2. Place the new Gasket in the Valve Body.
3. Lightly lubricate the Valve Body or Union Nut threads with an appropriate
lubricant, as consistent with the Valve's service requirements.
4. Preferably, pressurize the Bonnet Sub-assembly at the 10-32 UNF port in
the Actuator Body to open the valve for the following step.
5. Engage the Bonnet Sub-assembly onto the Valve Body and torque the
Union Nut to 50 Ft-lbs. (67 N-m) maximum.
