cla-val pressure relief r9-08

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 All Pressure Relief Valves are designed to open when inlet

pressure is above the pilot setting

Pressure Sustaining Valves will maintain a minimum

upstream pressure.

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X42N-2 Strainer Needle Valve

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X44A Strainer Needle Valve

Provides external

pilot protection

 Adjustablerestriction – 

closing speed

control  Acts as the

connection to the

CRL Pilot

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CV Speed Control

Restrictedflow

F r  e ef  l   ow 

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CRL Relief Pilot Control

Normally closed

Opens on pressure rise

Senses inlet pressure

remotely

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CRL Parts

Breakdown

Body with integral seat

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CRL Animation

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CRL Pilot

Control

CRD Pilot

Control

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55F Pressure

Relief Valve

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High Pressure

CRL PilotControl:

CRL 100-300

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CRL Adjustment Ranges

Higher pressures

available upon request

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Regulator Spring Color 

Coding

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50-01 Pressure Relief Valve

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Model 50-36 Pressure Relief Valve

with Rapid Opening

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Model 58-01 Pressure Relief valve with

Solenoid Shut-Off 

De-energize

to open

Energize

to open

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Typical Pressure Relief Application

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Check upstream pressure with gauge

Determine the psi per turn for that spring.

Back-off on CRL adjustment until valvebegins to open at a known pressure.

Turn adjusting screw in enough to set at

desired point.

CRL Troubleshooting

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Installation: Costa Mesa, CA

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Pressure Sustaining Application

Minimum

set point

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92-01 Pressure

Reducing/Sustaining Valve

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Installation: Mission Viejo, CA

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Pressure Reducing-Pressure

Sustaining and Check Valve

Upper 

Zone

Lower Zone

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Model 92-01 Pressure Reducing-

Pressure Sustaining Control Valve

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Model 92-01 Basic Operation

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Installation: Vista, CA

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Typical Back Pressure Application

Well

Pump

Model 50-01

to distribution

system

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50 Series Troubleshooting

The best method to check the function

of the 50 Series valve is to vary the

adjustment.

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50 Series Troubleshooting

If the main valve

doesn’t open: 

Check pilot adjustment – 

set too high.

X42N-2 strainer/needle

valve is too far out. Down-stream ball valve

is closed.

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50 Series Troubleshooting

If the main valve doesn’t close: 

Check system pressure – In a relief application

it may be doing its job! Pilot adjustment may be set too low.

Y-Strainer/ needle valve may be clogged – no

supply pressure to the cover.

Needle valve closed too tight or up-stream ball

valve closed.

Check main valve diaphragm.

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The Right Valve for the Job

CLA-VAL