Expanding Gate Valve is manufactured in accordance with API-6D. This type of valve is suitable for onshore and offshore applications where suspended and abrasive solids are present in the fluid or for oil and gas transportation and isolation service. Expanding Gate Valve are full opening valves with rising stem and Parallel Expanding Gate and segment for tight mechanical seal and positive shut-off, both upstream and downstream and under both low and high differential pressure. The Double Block and Bleed design offers a proper seal in between both seats and the gate in high and low pressure, for this reason, line pressure is not needed to seal the valve


Carbon Steel ASTM A216 - WCB or Equivalent
Alloy Steel ASTM A217 - WC6, WC9, C5, C12, C12A or Equivalent
Duplex Stainless Steel ASTM A995 - 1A, 2A, 4A, 5A or Equivalent
Stainless Steel ASTM A351 - CF8, CF8M, CF3, CF3M, CN7M or Equivalent
Special Alloy Steel Inconel 625, 825 or Equivalent
Hastelloy C
Monel or Equivalent
Bronze Steel ASTM B148 - C95800
ASTM B62 - C83600
ASTM B61 - C92200
Bronze or Equivalent

Production Range

  • Pressure Rating: ASME class 150 to class 1,500
  • Service Temperature: Up to +500℃
  • Available Size: NPS 2" ~ 36"

Design Standards

  • Basic Standards:API 6D, ASME B16.34
  • Face to Face:API 6D

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