Cryogenic Relief Valve Brass (CRV)0 pages
CRYOGENIC RELIEF VALVE (BRASS)
1/4", 3/8” and 1/2" NPT
10 - 750 Psig (0.7 - 51.7 Bar)
BRASS
CRV
Description
The Generant Series Brass CRV, Cryogenic Relief Valve is a spring
reference over pressure protection device. The CRV incorporates
Generant’s exclusive “Dirt Guard” feature which increases the valves
ability to tolerate particulate contamination. This device is ideally
suited for use as a “Blocked Line Safety” in cryogenic systems. The
CRV is supplied cleaned and packaged for oxygen service. The
valve can be ordered with set pressures ranging from 10 to 750 Psig
(0.7 to 51.7 Bar) and come factory preset and permanently locked.
Relief pressure can not be altered or adjusted in the field. Seat and
poppet geometry combined with optimized spring ranges provide
high flow rates with minimum pressure accumulation. Compact
design and availability of a variety of inlet and outlet configurations
reduces size and piping requirements. Relief pressure can be
discharged to atmosphere or to a downstream connection. The CRV
is supplied with Flourosilicone seals for set pressures from 10 – 49
Psig (0.7 – 3.4 Bar) and PCTFE seals for set pressures 50 – 750
Psig (3.5 – 51.7 Bar).
Features
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Available CE marked in accordance to the requirements
of the PED 97/23/EC
Exclusive “Dirt Guard” poppet incorporates screen to
extend valve life and ensure reliability
High Flow Capacity and Excellent Reseal Performance
Supplied Factory Preset and Permanently Locked for
Tamper Proof Service
Discharge to Atmosphere or a Wide Variety of Inline
Piping Configurations
Optional Deflector Cap available for diverting exhausted
gas
100% Factory Tested for Leakage, Crack and Reseal
Cleaned and Packaged for Oxygen Service
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Technical Data
Nominal Set Pressure Range: 10 – 750 Psig (0.7 to 51.7 Bar)
Factory Set Tolerance*: Set Pressure ≥ 72.5 PSI, ± 3%
Set Pressure < 72.5 PSI, ± 2.175 PSI
*tolerance specifications per EN ISO 4126-1.
Zero Leakage to 95% of Set Pressure
Full Rated Flow @ 110% of Set Pressure
Unaffected by up to 10% Back Pressure
Reseat: 90% of set pressure
85% for PCTFE seals set below 100 Psig (6.9 Bar)
Temperature Rating: -320º to 350º F (-196º C to 176º C)
based on seal material (see How To Order)
SERIES
Lubricant: Krytox®
Materials of Construction
Component
Body, Poppet, Adjusting
Spring Retainer, Pipe-Away
Adapters, Deflector Cap,
Tamper Proof Ring
Material
Brass, ASTM B16
302 (ASTM A313) or
17-4PH (ASTM A564)
Spring
PCTFE (ASTM D1430),
or Fluorosilicone
Seal
Color Coded Identification
Label
SA.SL.CRV002.C.2234
Mylar
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