DOUBLE EXPANDING GATE

Double expanding gate valves are made by two sliding pieces consisting of a gate and a second segment (male and female wedge segment). The gate (female wedge) is driven by the stem and a centralizer mechanism guide helps in retaining the gate-segment assembly until sealing through expansion is required.

Sealing is achieved in both high and low pressure conditions by expanding the gate and the segment out towards the seats while the wedge is in a closed position. Easy maintenance on service without disassembling the valves from the line.

Body construction is one piece, made by forging or casting.

STANDARD DESIGN
API 6D – API 6A

BODY JOINT
Bolted Bonnet

FACE TO FACE
Face to Face and End to End dimension as per API 6D, ASME B16.10 or API 6A

END CONNECTION

  • Butt Weld BW
  • Flanged RF or RTJ
  • Clamp or Hub as customer drawings
PORT
Full Bore

RANGE SIZE
Nominal Ball Bore 2”to 24” / 1 13/16” to 16 3/4”

RATING CLASS DESIGNATION
From 150# to 2500# / API 2,000 to API 10,000 (API 6A)

  • Top Entry
  • Soft Seat
  • Metal to Metal Seat
  • High Temperature Service
  • Low Temperature and Cryogenic Service
  • Double Block & Bleed
  • Design and Construction according to ASME 16.34, ASME VIII
  • Fire Safe Design according to BS 6755-2, API 6FA and API 607
  • Antistatic Device
  • Hand or Motor operated recommended rim-pull handle forces according to EN ISO 12570
  • Anti Blow-out System
  • Uni-directional Flow
  • Stem Extension (optional)
  • Locking Device (optional)
  •  Field Replaceable Stem Seals
  • Drain Plug and Vent/bleeder
  • Emergency Sealant Injections (optional)
  • Lifting Lugs and Supporting Feet on 6″ and larger valves