Parker U Series - User Manual

Maintenance
Instructions
MI-104 Revision -
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
1
U Series Needle Valve
Table I: Maximum Working Pressure and Temperature
Valve Packing Maximum Pressure and Temperaure Maximum Temperature and Pressure
Grafoil ® 6000 psig at 70 °F 1545 psig at 1200 °F
41.4 MPa at 21 °C 10.7 MPa at 649 °C
PTFE 6000 psig at 70 °F 4280 psig at 450 °F
41.4 MPa at 21 °C 29.5 MPa at 204 °C
Always consult your authorized Parker representative if questions arise. The arrow on the Valve Body indicates the
normal direction of flow.
Table II: Packing Nut
Hex Wrench Sizes and Tightening Requirements
Valve Size Hex Wrench Size PTFE Stem Packing Grafoil ® Stem Packing
U6 3/4 inch 125 in-lbs 10.4 ft-lbs
(14.1 N-m) (37.3 N-m)
U12 15/16 inch 150 in-lbs 33.3 ft-lbs
(16.8 N-m) (44.8 N-m)
U16 1-1/8 inch 50 ft-lbs 50 ft-lbs
(67.8 N-m) (67.8 N-m)

Summary

Panel Mounted Valves

Disassembly

Additional Step (U16 only)

Special procedure for the U16 model during disassembly.

Reassembly

Valve Connector Make-up Instructions

Male and Female Pipe Ports

Instructions for connecting male and female pipe ports.

UltraSeal Connections

Procedures for making UltraSeal connections.

VacuSeal Connections

Guidelines for making VacuSeal connections.

Tube Fitting Connections

Steps for connecting tube fittings to the valve.

Warning

Parker U Series Specifications

General

Brand	Parker
Model	U Series
Category	Control Unit
Language	English