Plate Gate Valve

Specifications

Gate Valve was developed to satisfy the need for a high quality reliable valve which is reasonably priced. All Gate valve makes full use of modern materials and manufacturing techniques. It is easy to maintain, conforms to international design requirements and Quality Assurance Programme. All XUDONG Gate Valve are manufactured to API 6A Specification as a basic minimum, in a Plant that is API Q1 and ISO9001 approved and Certified.

Forged or Cast Body & Bonnet

All type gate valve bodies and bonnets are manufactured

from forged or cast AISI 4130/4140 low alloy or AISI 410 SS

steel. Other materials for extreme service, such as Inconel

or Duplex stainless steel are available to order.

Metal-to-Metal Seat to Body Interface

Precision lapped faces between the gate and seat ensure a metal-to-metal pressure tight seal is maintained. Seat is lapped on both surface to give a true metal to metal seal between the body and seat. This seal is further reinforced and protected by a Teflon or Viton lip seal, giving bubble tight sealing performance at pressure below 10 psi.

Gate & Seat Design for Slab Gate

The seat in the gate valve are fully floating, this combined with a solid slab gate gives a true downstream seal resulting in exceptionally low operating forces.

Gate & Seat Design for Expanding Gate

The expanding gate creates a positive mechanical seal across the seats with or without line pressure. Floating seals withresilient seals allow the seats to be tightly wedged into the seats pockets in the open or closed position.

Bi-directional Sealing

All XUDONGGate Valve is a true bi-directional valve. Being fully symmetrical,it will effectively seal pressure from eitherdirection without the risk of pressurelock. If the valve is used in uni-directional application,the gate and seats can bereversed to give a extra service life.

Gate Guided

The gate is guided positively by the valve body and close fitting stainless steel skirts. The skirts minimize the ingress of wellfluid mud and sand into the body cavity.

Body to Bonnet Seal

A metal-to-metal seal is achieved between the body and bonnet using

XUDONG metal-to-metal sealing technology. The sealring is re-useable.

Non-rising Stem with Backseat

The stem used in the XUDONG gate valve is manufactured from Alloy-Nitrided or 17-4 stainless steel. Being of the non-risingdesign, valve operation will not increase the pressure in the body cavity. Seal against the bonnet, providing means toreplace the valve stem packing with the valve is under pressure.

Stem Seal

All stem seals are non-elastomeric and are inert to most known liquids and gases.Being made from PTFE/R-PTFE stemfrictional resistance is minimized resulting in lower operating torque. The stem seal design is suitable for all temperaturerange and services. Graphite stem packing is option on user request.

Bearing

Heavy duty thrust bearing are used to absorb stem thrust and reduce

operating torque. A grease fitting is located on thebearing cap to allow for lubrication to ensure continued trouble-free operation.

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