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Through Conduit

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WALWORTH Slab Gate Valves also named "Through Conduit Gate Valve" are manufactured and tested in accordance with the API-6D standard. This type of valve is very useful in transportation pipe lines for gas, crude oil and oil products. The Slab Gate Valve is through conduit and piggable. Slab Gate Valve has been designed to minimize pressure drop and catch foreign materials such as slurries into the disc cavity to keep clean the sealing surface areas.

WALWORTH® Slab Gate valve uses the resultant force from line pressure to help to have a Mechanical and tight sealing in downstream side when high differential pressure occurs. Low pressure sealing is achieved by internal springs assisting in pushing the seat ring against the gate to obtain the seal.
WALWORTH® offers this product line in the following base materials:

  • Carbon Steel such as WCB.
  • Carbon Steel for NACE Applications like WCB with 0.25 % C maximum and 22 HRc maximum hardness.
  • Low carbon steel for low temperature service like LCB.
  • Stainless Steel like CF8M.

Design Features

  • Design in accordance API-6D.
  • Full thru-conduit port to permit pass scrapers, pigs and wipers.
  • Top entry for maintenance inline.
  • Double block and bleed.
  • Bi-directional.
  • Secondary seal seat grease injectors.
  • Hand-wheel, Impact Hand-wheel, Chain-wheel, Gear operation, Electric, Pneumatic or Hydraulic Actuation as per Customer requirements.
  • Flanged or Butt Weld ends.
  • Flanges in accordance ASME/ANSI B16.5 up to 24" nominal diameter.
  • Flanges in accordance ASME/ANSI B16.47 from 26" nominal diameter and up.
  • Meets Fire Test in accordance API 6D

WALWORTH® Expanding Gate valves are manufactured and tested 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.

The double block and bleed design offers a proper seal in between both seats and the gate in both high and low pressure, for this reason line pressure is not needed to seal the valve. The principle of operation is based in two segmented members of a disc which at open or closed position is capable to seal in both directions.

WALWORTH® offers this product line in the following base materials:

  1. Carbon Steel such as WCB, WCC.
  2. Carbon Steel as per ASTM A216 grade WCB for NACE MR0-175 with 0.25%C maximum and 22HRc maximum hardness.

Design

  • In accordance with API-6D.
  • Full thru-conduit port to permit pass scrapers, pigs and wipers.
  • Top entry for maintenance inline.
  • Double block and bleed at open or closed position.
  • Bi-directional.Hand-wheel, Impact Hand-wheel, Chain-wheel, Gear operation, Electric, Pneumatic or Hydraulic Actuation as per Customer requirements.
  • Hard faced option is available for severe service with Tungsten carbide or stellite applied by HVOF process.
  • Test in accordance with API-6D.
Product Range
TYPE SIZE PRESSURE CLASS as per asme/ansi b16.34 ENDS

Slab Gate Valve

2" to 48”

150, 300, 600, 900 & 1500 #

RF, RTJ or BW