Parker MI-101 Operating and maintenance instructions
Maintenance
Instructions
MI-101 Revision -
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
1
VQ Series Needle Valve
Figure 1: VQ Series Toggle Needle Valve Cross Sectional View
MAXIMUM WORKING PRESSURE AND TEMPERATURE
Valve Size Max Pressure and Temperature Max Temperature and Pressure
V Q 300 Psig at 70 °F 300 Psig at 200 °F
2.1 MPa at 21 °C 2.1 MPa at 93 °C
V6Q 300 Psig at 70 °F 300 Psig at 200 °F
2.1 MPa at 21 °C 2.1 MPa at 93 °C
Always consult your authorized Parker representative if questions arise. The arrow on the Valve Body indicates the
normal direction of flow.
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
MI-101
PANEL MOUNTED VALVES
The panel must have a through-hole of the proper diameter as listed below:
V Q Valves 33/6 inch (13.1 mm)
V6Q Valves 1/6 inch (16.3 mm)
The maximum panel thickness is 1/ inch (6. mm). When the Valve is to be mounted to a thin panel, a spacer (or
washer) may be necessary to permit full Panel Nut engagement on the Valve. It is not necessary to disassemble the
Valve for panel mounting.
1.Actuate the Handle up to the open position, such that it is parallel with the Valve Stem.
2.Insert the Valve through the hole in the panel, and assemble the Panel Nut onto the Cap until the Panel Nut is finger-
tight.
3.Tighten the Panel Nut with the correct sized wrench as specified below:
V Q Valves 11/16 inch hex wrench
V6Q Valves 13/16 inch hex wrench
.Actuate the Handle back to the closed position, such that it is at right-angles with respect to the Valve Stem.
USE OF THE (OPTIONAL) HANDLE POSITIONER
Assemble the positioner in the same manner as the Panel Nut. The positioner intentionally fits tightly on the valve and
should be wrench tightened with the proper sized wrench as noted below:
V Q Valves 5/8 inch hex wrench
V6Q Valves 3/ inch hex wrench
When using the handle positioner and a panel mounting valve, the maximum panel thickness is 1/8 inch (3.2 mm).
Whenever assembling the handle positioner, make certain it is screwed onto the valve far enough to allow the valve to
fully close. This is evident by a visible gap between the handle and the slot in the positioner, and the lever handle will
feel loose.
Figure 2: VQ Series Toggle Needle Valve Exploded View
2
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
MI-101
DISASSEMBLY
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.
1. Verify that the Toggle Needle Valve Maintenance Kit being used is appropriate for the Valves size, Stem Seat, and
service requirements. Always contact your authorized Parker representative if any questions arise.
2. Open the Valve by actuating the Handle such that it is parallel to the Valve Stem.
3. Remove the Panel Nut (if applicable) by turning counter-clockwise with the appropriate wrench:
V Q 11/16 inch hex wrench
V6Q 3/16 inch hex wrench
. Remove the Valve from its mounting panel (if applicable).
5. Close the valve, then remove and discard the Handle Spring Pin by lightly tapping the Spring Pin with a 3/6 inch
diameter punch. Gently remove the Handle by pulling it from the Stem.
6. Refer to Figure 2. Remove the Handle Washer located directly above the Cap. Set this piece aside for later
reassembly.
7. Remove the Cap by turning counter-clockwise with the appropriate wrench as noted below:
V Q 5/8 inch hex wrench
V6Q 3/ inch hex wrench
8. Gently remove the Stem Sub-Assembly and components from the Cap.
9. Remove the Stem Washer and Spring. Discard the Stem Washer.
10.Remove and discard the Stem O-Ring.
11.Discard the Stem Sub-Assembly.
REASSEMBLY
1. Make certain all parts are free of dirt or other contamination before starting reassembly of the Valve.
2. Apply a liberal amount of lubricant, as consistent with the valves service requirements, to the Stem O-Ring. Always
contact your authorized Parker representative if questions arise.
3. Refer to Figure 2. Stack the components listed below on the Stem Sub-Assembly in the following order, with the
first item being placed directly above the landing on the Stem.
A) Spring
B) Stem Washer
C) O-Ring, lubricated.
. Gently insert the modified Stem Sub-Assembly (from Step 3) through the stem hole in the Cap until the modified
Stem Sub-Assembly has bottomed-out in the Cap. NOTE: Exercise extreme care not to damage the O-Ring.
5. Install the Cap on the Body by turning clockwise until two or three threads are engaged, and torque as follows:
Val e Size Brass Val e Bodies Stainless Steel Bodies
V Q 100 in-lbs (11.3 N-m) 175 in-lbs (19.7 N-m)
V6Q 100 in-lbs (11.3 N-m) 300 in-lbs ((33.8 N-m)
6. Place the Handle Washer over the Stem.
7. Install the Handle on the Stem at right-angles with respect to the Stem. Align the Handles pin-attachment hole with
the corresponding hole in the Stem.
8. Gently install the Spring Pin in the Handles pin-attachment hole.
NOTE: A minimum gap of 1/32 inch (0.03125) must exist between the Handle and Handle Washer.
9. Actuate the Toggle Valve Handle through at least one (1) Open and Close cycle to verify proper operation of the
Handle.
10.Rebuild the Toggle Valve if it exhibits rough or irregular Handle operation. Always contact your authorized Parker
representative if questions arise.
11.Place the Valve in its mounting panel hole, if applicable, by turning the Panel Nut clockwise with the appropriate
wrench.
V Q 11/16 inch hex wrench
V6Q 13/16 inch hex wrench
3
MI-101
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
VALVE CONNECTOR MAKE-UP INSTRUCTIONS
MALE AND FEMALE PIPE PORTS
Wrench flats are provided on the Valve Body. It is recommended a smooth- jawed wrench or vise be used to grip the Valve Body.
1. On the male threaded part of the connection apply a high quality pipe joint compound or PTFE tape made for this purpose. When PTFE tape is
used it is recommended two full turns of tape be applied. PTFE tape should not be overhanging or covering the first thread
2. Engage the Valve and the other component part together until hand-tight.
3. With a proper wrench holding both the Valve and the component part continue to tighten to achieve a leak-tight joint.
ULTRASEAL CONNECTIONS
1. Insert the proper O-Ring into the UltraSeal fittings O-Ring groove. Position the UltraSeal gland sealing face against the O-Ring and then advance
the Nut to a finger-tight position.
2. A positive seal is obtained by advancing the Nut no less than 1/4 turn from the finger-tight position. Proper UltraSeal make-up is achieved when
a sharp rise in required application torque occurs which indicates proper seal face contact and O-Ring seal compression into the UltraSeal
groove.
VACUSEAL CONNECTIONS
1. A positive seal is obtained by advancing the Nut 1/8 turn from the finger-tight position.
2. A new gasket should be installed upon each fitting re-make to insure system pressure integrity.
TUBE FITTING CONNECTIONS
1. Insert the tube into the Valve port until the tube bottoms out in the Valve Body. Care should be exercised to insure the tube is properly aligned with
the Valve Body and port.
2. Normal make-up for US Customary port sizes 1 thru 3 (1/16 thru 3/16 inch) and SI port sizes 2 thru 4 (2 thru 4 mm) is 3/4 turn from finger tight.
Normal make-up for US Customary port sizes 4 thru 16 (1/4 thru 1 inch) and SI port sizes 5 thru 25 (5 thru 25 mm) is 1 1/4 turn from finger tight.
For larger port sizes consult Parker Ferrule Presetting Tool Instructions.
PLEASE FOLLOW THE ABOVE DIRECTIONS FOR COUNTING THE NUMBER OF TURNS FOR PROPER FITTING MAKE-UP. DO
NOT MAKE-UP TUBE FITTINGS BY TORQUE OR FEEL. VARIABLES SUCH AS TUBING AND FITTING TOLERANCES, TUBE
WALL THICKNESS, AND THE LUBRICITY OF NUT LUBRICANTS CAN RESULT IN AN IMPROPERLY ASSEMBLED TUBE FITTING
CONNECTION.
A -Two ferrule A-LOK ®
compression port
M -ANSI/ASME B1.2 .1
External pipe threads
Z -Single ferrule CPITM
compression port
Q -UltraSeal face
seal port
F -ANSI/ASME B1.2 .1
Internal pipe threads
V -VacuSeal face
seal port
Parker Hannifin Corporation
Instrumentation Valve Division
2651 Alabama Highway 21 North
Jacksonville AL 36265-9681
USA
Phone: (256) 435-2130
Fax: (256) 435-7718
www.parker.com/IVD
INI-2 1 Revision -
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 FAC-
TORY. 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.
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