China globe valve manufacturers, globe valve suppliers, globe valve factory. Vatac standard Cast Steel Globe Valves are designed and manufactured to ensure leakage of less than 100 ppm (parts per million) of volatile organic compounds. Extensive base line laboratory testing (static and cycle testing) has been performed establishing critical design parameters necessary to achieve low emission sealing in the Vatac stem packing seal area and in the bonnet gasket sealing area, In-house testing procedure has been developed and is periodically performed to ensure that standard product design and manufacturing criteria consistently result in the Vatac Globe Valve meeting a maximum of 100 ppm VOC leakage prior to shipment.
In services requiring frequent cycling or with high pressure/temperature variations, live loading extends the service life between maintenance periods by requiring less frequent packing gland adjustments. Belleville springs are employed to provide constant packing gland stress. Lantern Ring and Double Packing Set Lantern ring with leak-off fitting connection and double packing stack is optionally available for critical services.
Vatac Steel Globe valves use a combination of dieformed flexible graphite and interbraided graphite in a predetermined arrangement to ensure an effective seal. Graphite packing achieves its maximum ability to isolate the atmosphere when it is contained within a chamber that is precise in finish and dimension. Vatac Globe valves are manufactured with stem finishes better than 32 Ra and stuffing box wall finishes for 125 Ra. In addition, stem straightness and taper are closely controlled.
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Vatac Cast Steel Globe Valves are designed and manufactured strictly to International Standards BS1873, ASME B16.34 or DIN3202, Featured with compact structure & Tight shut off service.
STANDARDS COMPLIANCE:
» Design & Manufactured to BS 1873, ASME B16.34 or DIN3202
» P.T Ratings to ASME B16.34
» Face to Face dimensions to ASME B16.10
» Flanged Ends to ASME B16.5
» Butt-weld Ends to ASME B16.25
» Valves Marking to MSS SP-25
» Inspect & Tested to API 598
MANUFACTURING CAPABILITIES:
» Sizes Ranges from 1 1/2” thru 24”
» Structured in Bolted Cover, Outside Screw and York
» Pressure Ratings from Class 150 to Class 1500, PN16 to PN260
» Ends Connections in Flanged R.F or RTJ, Butt-welded and Grooved
» Body Materials available in Carbon Steel A216 WCB, WCC, Low Carbon Steel LCB, LCC, Alloy Steel A217 WC6, WC9, C5, Stainless Steel A351 CF3, CF8, CF3M, CF8M, Duplex & Super Duplex Steel A890 GR. 4A, GR. 5A, Special Materials in Monel, Alu. Bronze C95800, 95600 etc.
» Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials
» Actuations can be equipped with Handwheel, Gear Devices, Electric / Pneumatic or Hydraulic Actuators
» Optional SNDR Globe Check Valve, Bypass system, Live Loading Packing & O-ring Seal
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