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Fully Metal Seated Bidirectional District Heating Butterfly Valve

Fully Metal Seated Bidirectional District Heating Butterfly Valve

    The SV bidirectional district heating butterfly valve is specially designed for district heating and district cooling applications. The SV fully metal seated butterfly valve is widely used to meet the demand of on-off and regulating in thermal power plant, the heat exchange station, regional boiler room, the hot water pipe network, the steam pipeline and the cooling water system.

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  • Features
  • Specification

  • The disc seal ring of the SV fully metal seated butterfly valve is all metal seal ring not multi-layers seal ring with stainless steel and soft materials like flexible graphite or carbon fiber;
  • The SV metal seal butterfly valve has all metal disc seal ring and metal body seat to realize fully metal seated seal structure to avoid leakage duo to abrasion of graphite or carbon fiber;
  • The body seat fixed by two counter rings through bolts can be replaced easily;
  • Dynamically balanced sealing system makes the pressure at inlet and outlet side of disc almost balanced so that the butterfly valve will achieve zero leakage bidirectional tight shutoff while the operate torque is reduced effectively to almost 2/3 of normal butterfly valve;
  • Triple offset disc structure realizes no friction between disc seal ring and valve body seat when open or close and extends the service life greatly;
  • Butt welded connections is usually used between the district heating butterfly valve and the pipeline to avoid leakage from gasket and ensure work safely;
  • The lower end cover is welded to the body to prevent leakage and work reliably.

Full Metal to metal seal district heating butterfly valvesFully metal seated triple offset butterfly valvesButt welded ends bidirectional district heating butterfly valves

Product range:

  • End connection: BW
  • Size: 1"144" (DN253600)
  • Pressure rating: Class 1501500 (PN2.5PN260)
  • Operation: Bare stem, Lever, Gearbox and handwheel, Electric, Pneumatic
  • Body materials: Carbon steel WCB/A105, Low temperature steel LCB/LCC/LC3, High temperature steel WC6/WC9/C5/C12A, Austenitic stainless steel CF8/CF8M/CF8C/CF3/CF3M/CG8M, Super austenitic stainless steel 254SMO A351 CK-3MCuN, Duplex stainless steel UNS S31803/UNS S32205/N08904, Super duplex stainless steel UNS S32750/UNS S32760, Titanium alloy B368 gr.C-2, Hastelloy C276, Monel alloy A494 M-35-1, Aluminum bronze B148 C95800, Inconel 625, Incoloy 825, Alloy 20 CN7M etc.
  • Disc seal ring: SS430, F304, F316 etc.
  • Body seat materials: SS304, SS316, Stellite etc.
  • Stem materials: SS420, 17-4PH, SS304, SS316 etc.
  • Disc materials: WCB, CF8, CF8M, 904L, C95800 etc.

Technical standards:

  • Design: ASME B16.34, DIN 3840
  • Face to Face: API 609,ASME B16.10, ISO5752
  • BW ends: ASME B16.25, ASME B31.8, EN12627
  • ISO top flange: ISO5211
  • Materials: NACE MR 01-75
  • Wall thickness: ASME B16.34
  • Test and inspection: API 598
  • Fireproof test: API 607, API 6FA
  • Pressure and temperature rating: API609, ASME B16.34