GMK Pressure Seal Gate Valve

The pressure seal is a significant advancement in valve design when compared to the conventional approach of bolting the body to the bonnet as a means of creating a seal. It makes use of the pressure that is present within the valve system in order to exert the proper forces against the ID of the valve body and the bonnet surfaces. As the pressure in the system increases, the pressure seal gasket is subjected to an increasing amount of force. In spite of the fact that the pressure seal only makes use of the apex or toe of the gasket, the interior of the valve is constructed out of this diameter. Even under tens of thousands of pounds of pressure, the toe of the valve will seal when the system pressure is engaged. This will keep the system media contained within the valve.


  • Size:DN15-1500
  • Rating:Class150-2500
  • Material:WCB, LCB, LCC, WC6, WC9, C5, C12, C12A, CF8, CF8M, CF3, CF3M, CN7M, Alloy 20, B148, UB6 904l, Hastelloy C etc
  • Connection:RF, RTJ, BW
  • Working temperature:-29℃~+560℃

CE Certification

ISO Standards

Warranty Included



The usual flexible wedge design not only makes the seats snugger but also allows them to recover from even minimal elastic deformation and heat expansion without losing their shape. On-demand, we are able to fashion wedges in either a solid or split configuration. The obturator of this type of parallel slide consists of two separate plates, each of which is loaded with a spring. The two plates have the ability to recover from massive thermal expansions and contractions at will, which ensures that they maintain optimal contact with the seat at all times regardless of the conditions in the surrounding environment.

  • a low barrier to flow;
  • The torque required for opening and closing is low;
  • The medium can go in either way through the pipelines of the ring-shaped system; the flow in either direction is possible.
  • After being opened all the way, the sealing surface is less likely to be damaged by the working media than it would be with a globe valve.
  • The body shape is easy to produce because it is so straightforward;
  • The building is short in terms of its overall length.



  • OS&Y outside screw and yoke
  • Pressure seat bonnet
  • Threaded or welded seat ring
  • Solid, flexible, or split wedge design
  • Back-seating, renewable seat ring
  • Full port or reduced bore
  • Fully guiding, flexible wedge
  • Optional upset forged T-head stem design
  • MR 0175 and MR 103 on request
  • One piece
  • Seat surface hard face STL


Size DN15-1500
Rating Class150-2500
Material WCB, LCB, LCC, WC6, WC9, C5, C12, C12A, CF8, CF8M, CF3, CF3M, CN7M, Alloy 20, B148, UB6 904l, Hastelloy C etc
Connection RF, RTJ, BW
Working temperature -29℃~+560℃
Operation Handwheel, gearbox, etc
Medium Water, oil, gas
Supply ability 10000 piece/pieces per month
Port Wenzhou/shanghai
Payment terms L/C, D/A, D/P, T/T
Delivery time 7-10 Working day
  • Design and manufacture: API 600, BS1414, DIN 3352, ANSI B16.34, API603 API6D
  • Pressure-temperature rating: ASME B16.34
  • Face to face(end to end): ASME B16.10, DIN 3202, BS EN558, API6D
  • End connection: 2″-24″ASME B16.5; 26″ -42″ ASME B16.47; B.W end ASME B16.25, DIN 2501
  • Test and inspection: ISO5208,API 6D, API598
Can we order goods from you directly?
Yes, we look forward to receiving your order. However, please note our minimum purchase quantity. If you require smaller quantities we will be happy to arrange an individual delivery. We would be delighted to assist you.
Can I get a discount?
This depends on the specific situation, you can call directly to consult.