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Instrumentation Applications » Needle
Valves Series - BS31 |
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Features» Available in SS316 conforms to NACE MRO1-75 » Bar stock Body in Straight Patterns » Panel Mountable » Variety of end configurations includes SEALEXCEL® Well-Lok Tube Fittings, Male / Female NPT, BSPT, BSPP pipe connections » Hardened Stem Tip » Flow coefficients (Cv) from 0.35 to 8.6 » Orifice size : 0.156" (4mm), 0.250" (6.4mm) and 0.437" (11mm) » Every valve is factory tested. ![]()
Operating Parameters Pressure Rating : Upto 10,000 psig (680 bar) at CWP Temperature Rating : -54°C to 232°C with standard PTFE packing upto 426°C with optional Graphite Applications » General Plant Service » Instrument Isolations » Hydraulic and Pneumatic » Pressuring measurement devices » Venting Stem Type SEALEXCEL® Needle Valves are available with choice of optional stem to provide greater flexibility. NON-ROTATING (NR) : It is Standard self centering non rotating stem tip typically used in high cycle application to extend the valve life. V-STEM (VS) : It is used for general purpose liquid and gases. REGULATING STEM (RS) : It is used where some degree of flow control required. ![]()
Technical Data The Temperature and Pressure rating for a standard valve with PTFE packing
Testing Standard Test : Each valve is factory tested with nitrogen at 1000 psig (69 bar) for leakage at the seat and packing, the maximum allowable leak rate of 0.1 sccm Optional Hydrostatic Test : This test is performed with de-ionised water at 1.5 times the working pressure ![]()
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