Product Description
Enclosed Discharge Safety Relief Valve for Refrigeration
Available with 10, 13, and 18mm nominal bore – See Datasheet
Stainless Steel (for Brass & Bronze, see type 636).
Example Applications:
- Refrigeration compressor manufacture
- Industrial refrigeration
- Commercial refrigeration
- Ice making machinery
- Air conditioning
Technical Information
Technical Information for Type 646 / 641
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Min. Pressure6.60 bar (95.70 psi)
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Max. Pressure55.20 bar (800.40 psi)
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Temperature Range-30°C to 200°C (subject to seal material)
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Inlet Connection(s)3/8” to 1 1/2” (depending on bore size)
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Outlet Connection(s)3/4” to 1 1/2” (depending on bore size)
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Flow RateRefer to Flow Tables on the datasheet
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MaterialsStainless Steel
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Seal MaterialsPerfluroelastomer (FFKM)
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Test CertificationIncluded - supplied Free of charge
Flow Rates:
See datasheet
Notes:
- The maximum permissible built-up back pressure is 10% of set pressure
- Stable operation on flows down to 50% of valve-rated capacity
- Relieving pressure is set pressure +10%
- Reseating pressure is set pressure -10%
Approvals:
- Designed in accordance with BS EN ISO-4126-1 & -7
- PED 2014/68/EU (CE)
- PE(S)R UK SI 2016 No. 1105 (UKCA)
- ASME BPVC VIII.1 & XIII (UV)
- CRN
Engineered for Reliability
More than just rugged hardware, these valves incorporate meticulous design and rigorous testing to ensure dependable performance under even the most demanding pressure situations.
Downloads
View or Download the Type 646 / 641 Datasheet
Full Technical Information - Including Flow Rates
View or Download the Type 646 / 641 Datasheet
Seetru offers a wide range of downloadable datasheets for our products, including safety relief valves, liquid-level gauges, and sight glasses. These datasheets provide detailed information on the technical specifications, features, and applications of Seetru products. They are an essential resource for engineers, designers, and other professionals who need to select the right Seetru products for their specific needs.
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