GO Cast Iron Gate Valve Rising Stem Solid Wedge Disc Table E Range

26 Oct.,2022


ductile iron gate valves

GO Cast Iron Gate Valve Rising Stem Solid Wedge Disc Table E Range

  • Size Range - 50mm - 400mm
  • Flange - AS2129 Table E
  • Maximum Temperature - 100 deg C
  • Cold Working Pressure - 1379 kpa
  • Applications - Water / Sewerage / Neutral Liquids
  • Body - Cast Iron
  • Seat Ring - Cast Bronze
  • Wedge Face Ring - Cast Bronze
  • Wedge - Cast Iron
  • Wedge Nut - Cast Bronze
  • Stem - Brass
  • Body Gasket - Full Face Nitrile
  • Bolts and Nuts - Zinc Plated Steel
  • Bonnet - Cast Iron
  • Gland Follower Bolt - Steel
  • Stuffing Box Gasket - Teflon
  • Stuffing Box - Cast Iron
  • Packing - Teflon
  • Gland Follower - Ductile Iron
  • Yoke Bushing - Cast Brass
  • Hand Wheel - Cast Iron

A gate valve, also known as a sluice valve, is a valve which opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired.

The gate faces can be parallel, but are most commonly wedge-shaped. Gate valves are primarily used to permit or prevent the flow of liquids, but typical gate valves shouldn't be used for regulating flow, unless they are specifically designed for that purpose. Because of their ability to cut through liquids, gate valves are often used in the petroleum industry.

For extremely thick fluids, a specialty valve often known as a knife gate valve is used to cut through the liquid.  

On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing gate and seat wear and eventual leakage if used to regulate flow.

Typical gate valves are designed to be fully opened or closed.  When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.