Cryogenic Safety Relief Valves

*PRODUCT IMAGE IS REPRESENTATIVE PROVIDED BY THE MANUFACTURER. DO NOT MAKE BUYING DECISIONS SOLEY BASED ON THE IMAGE. PLEASE VERIFY SPECIFICATIONS MEET YOUR REQUIREMENTS.

Parker Bestobell’s cryogenic safety relief valves are designed to protect cryogenic static and road-going storage tanks or capital equipment from damage caused by over-pressure.

These cryogenic safety relief valves feature an innovative proportional lift action which ensures that when the pressure in a tank rises, the safety relief valve activates and releases pressure gently to enable it to drop back to a safe pressure.

They are available in three basic sizes defined by the throat diameter and are available with a variety of inlet and outlet connections. The valves are designed and factory set to lift repeatedly within +/- 2% of the set pressure and to re-seat above 92% of set pressure. Spring pre-compression and blow-down ring settings are securely sealed and factory set after testing to inhibit unauthorised tampering, as these are Category Four safety products. Flow rates at 10% above set pressure are measured to ensure compliance with stated flow capacities as an additional safety precaution.

These valves have an exceptional safety record in the field and have been used on a worldwide basis for over 50 years.
Markets:
Industrial Gas – designed and engineered for use with Group 1 gases

Features/benefits:
• Unique proportional lift action to release pressure gently
• Manufactured from high quality Stainless Steel or Bronze
• Designed to comply with ISO 4126 (Safety Valves General Requirement), Ad-Merkblatt A2 (Safety Devices against Excess Pressure) and TUV requirements.

Applications:
• Transport
• Storage
• Defence
• Processing

Gases/liquids
• Oxygen (O2)
• Nitrogen (N2)
• Argon (Ar)
• Carbon Dioxide (CO2)
• Krypton (Kr)
• Neon (Ne)
• Hydrogen (H2)
• Nitrous Oxide (N2O)
• Sulphur Hexafluoride (SF6)
• Natural Gas (CH4)
• Ethylene (C2H4)
• Trifluoromethane (CHF3)

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SKU	Availability	Price	Maximum Operating Temperature	Division	Weight	Minimum Operating Temperature	Body Material	Options	Valve Type	Orifice Size	Inlet Port Size	Pressure Rating	Outlet Port Type	Additional Options	Inlet Connection Size	Outlet Connection Size	Options	Body Material	Inlet Size (inch)	Valve Type	Orifice Size (mm)	Outlet Size (inch)	Pressure Range (bar)	Pressure Range (psi)	Inlet Port Connection Type	Outlet Port Connection Type
CWF20KN38N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	BSP-TR Male	149 to 219 psi	Female BSP-TR	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	10.3-15.1	149-219	BSP-TR Male	BSP-TR Female
CWF20KN48N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	BSP-TR Male	220 to 289 psi	Female BSP-TR	Elbow	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	15.2-19.9	220-289	BSP-TR Male	BSP-TR Female
CWF20KN53N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	BSP-TR Male	290 to 435 psi	Female BSP-TR	Downpipe & Coupling	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	20-30	290-435	BSP-TR Male	BSP-TR Female
CWF20KN63N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	BSP-TR Male	29 to 40 bar	Female BSP-TR	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	29-40	420-580	BSP-TR Male	BSP-TR Female
CWF20LK17N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	54 to 79 psi	Female NPT	Inlet Adaptor	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	3.7-5.4	54-79	NPT Male	NPT Female
CWF20LK25N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	80 to 111 psi	Female NPT	Downpipe & Coupling	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	5.5-7.6	80-111	NPT Male	NPT Female
CWF20LK32N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	112 to 148 psi	Female NPT	Elbow	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	7.7-10.2	112-148	NPT Male	NPT Female
CWF20LK38N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	149 to 219 psi	Female NPT	Elbow	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	10.3-15.1	149-219	NPT Male	NPT Female
CWF20LK48N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	220 to 289 psi	Female NPT	Inlet Adaptor	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	15.2-19.9	220-289	NPT Male	NPT Female
CWF20LK53N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	20 to 30 bar	Female NPT	Downpipe & Coupling	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	20-30	290-435	NPT Male	NPT Female
CWF20LK63N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	420 to 580 psi	Female NPT	Downpipe & Coupling	1/2 inch	3/4 inch	No drain	Bronze	1/2	Without Lever	11.4	3/4	29-40	420-580	NPT Male	NPT Female
CWF20LL38N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	149 to 219 psi	Female BSP-PL	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	10.3-15.1	149-219	NPT Male	BSP-PL Female
CWF20LL48N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	220 to 289 psi	Female BSP-PL	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	15.2-19.9	220-289	NPT Male	BSP-PL Female
CWF20LL53N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	290 to 435 psi	Female BSP-PL	Downpipe & Coupling	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	20-30	290-435	NPT Male	BSP-PL Female
CWF20LL63N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	420 to 580 psi	Female BSP-PL	Elbow	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	29-40	420-580	NPT Male	BSP-PL Female
CWF20LR05N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	1.7 to 2.7 bar	Female NPT	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	1.7-2.7	25-39	NPT Male	NPT Female
CWF20LR12N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	2.8 to 3.6 bar	Female NPT	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	2.8-3.6	40-53	NPT Male	NPT Female
CWF20LR17N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	54 to 79 psi	Female NPT	Inlet Adaptor	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	3.7-5.4	54-79	NPT Male	NPT Female
CWF20LR25N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	80 to 111 psi	Female NPT	Downpipe & Coupling	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	5.5-7.6	80-111	NPT Male	NPT Female
CWF20LR32N00	Backordered	POR	65 °C	Refrigerating Specialties Division	1.5 kg	-196 °C	Bronze	No Drain	Without Lever	11.4 mm	NPT Male	7.7 to 10.2 bar	Female NPT	Elbow	1/2 inch	1 inch	No drain	Bronze	1/2	Without Lever	11.4	1	7.7-10.2	112-148	NPT Male	NPT Female

Cryogenic Safety Relief Valves

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