Download - 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