Parker RL Series User Manual

Maintenance
Instructions
MI-137 Revision A
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
1
RL Series Relief Valve
Figure 1: RL Series
Relief Valve Cross
Sectional View
Figure 2: RL Series
Relief Valve with
Manual Overrride
Cross Sectional View
Spring Acquisition
The valve is shipped assembled complete less the adjustment cap and the lock nut. Springs can be acquired by
ordering the appropriate kit. Spring kits are as follows:
Spring Pressure Range Kit Name Color Code
10-25 psi KIT-RL4SP-0-25 Magenta
25- 50 psi KIT-RL4SP-25-50 Brown
50-100 psi KIT-RL4SP-50-100 Purple
100-150 psi KIT-RL4SP-100-150 Dark Green
150-225 psi KIT-RL4SP-150-225 Dark Blue
225-400 psi KIT-RL4SP-225-400 White
10-225 psi KIT-RL4SP-10-225 None
Each kit includes a Spring, two (2) PTFE washers, a label, locking wire, and a lead tie down disk.

Parker RL Series Specifications

General

Brand	Parker
Model	RL Series
Category	Control Unit
Language	English

Summary

Spring Acquisition

Disassembly Instructions

O-Ring and Back-Up Ring Insertion

Procedure for inserting O-rings and back-up rings using a mandrel for proper valve sealing.

Reassembly Instructions

Setting Desired Cracking Pressure

Steps to adjust and lock the valve's cracking pressure accurately using the cap and locknut.

Valve Connector Make-Up Instructions

Male and Female Pipe Ports

Connecting male and female pipe ports securely with appropriate thread sealant or PTFE tape.

UltraSeal Connections

Ensuring a positive seal with UltraSeal fittings by correct O-ring and nut advancement.

VacuSeal Connections

Achieving system pressure integrity with VacuSeal connections and new gaskets.

Tube Fitting Connections

Proper make-up of tube fittings, emphasizing alignment and specific turn counts for reliability.

General Warnings and Disclaimers