GMK High Performance Butterfly Valve

A GMK high-performance butterfly valve is also known as a double-offset butterfly valve. Double Offset refers to the fact that the disc of a High-Performance Butterfly Valve is not centered on the seat. This setup has the disc eccentric or displaced, relative to the valve seat. The disc deviates away from the user rather than across the seat when it begins to rotate. Sealing is aided in this design by the pressure from the line itself. Offset butterfly valves can be used in high-pressure systems, such as those used for heating, ventilation, and air conditioning, thanks to this design characteristic. Its seats are typically made of PTFE or acrylic, while metal seats are also available for use with fire testing protocols such as API 607. The polymer seat of a double offset butterfly valve is typically PTFE, and the metal backing is there to prevent fires. Metal-to-metal chairs are also on the market, and they might offer better sealing quality and tolerate slightly greater temperatures.

  • Size:DN50-DN2000
  • Rating:150LB-900LB
  • Material:Cast iron, ductile iron, WCB, LCB, LCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, B148, UB6, CN7M, CK20, etc
  • Connection:Wafer type, lug type, flange
  • Operate:Handwheel, gearbox, pneumatic

CE Certification

ISO Standards

Warranty Included



  • The benefits of butterfly valves include their portability and low weight.

Because of their small size and lightweight, butterfly valves are useful in a wide variety of settings. For high-pressure and high-temperature fluid processing, a metal-seated valve is your best bet, while a soft-seated butterfly valve is preferable for milder conditions. The butterfly disc is a compact pump component that provides sufficient strength for most applications.

  • Easy on the pocketbook and highly efficient

For their low upkeep and straightforward construction, butterfly valves are a popular choice. Setting them up and using them is a breeze. Additionally, the price is often substantially lower than that of a comparable-size ball valve. They don’t need a lot of torque to function, and they can be run automatically for maximum efficiency.

  • Fast and Effective

More precise flow control may be achieved with less effort because of the valve’s 90-degree turning radius, which allows for rapid sealing upon actuation. The zero-offset, double-offset, and triple-offset butterfly valves are all options. Which one is necessary, in most cases, depends on the pressure. If the valve’s offset is increased, it can withstand greater pressure.

  • Regulating Pressure

Butterfly valves excel at regulating pressure in addition to regulating flow precisely. Because of this, they cause only a slight decrease in pressure during operation, and the fluids quickly regain their previous velocity and power after they pass through the valve. This maintains reliable fluid pressures in the pump system.


  • Double eccentric
  • Soft seat
  • High performance
  • High-pressure resistant, corrosion-resistant
  • Both have adjusted and shut-off function
  • Bi-direction seal or single direction seal
  • Easy installation and maintenance. It can be mounted wherever needed
  • Top flange ISO 5211 for optional
  • Long service life and energy-saving
  • Low maintenance costs
  • Small volume, lightweight
  • Nonfire safe upon optional
  • Torque is a little lighter than metal to metal seal
  • Valve seat material can be PTFE, RPTFE, etc
  • Disc and stem connection can be with a pin or without pin connection


Size DN50-DN2000
Rating 150LB-900LB
Material Cast iron, ductile iron, WCB, LCB, LCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, B148, UB6, CN7M, CK20, etc
Connection Wafer type, lug type, flange
Operate Handwheel, gearbox, pneumatic
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 609, MSS SP-67
  • Pressure-temperature rating: ASME B16.34
  • Face to face(end to end): ANSI B16.10
  • End connection: Flange end 2″-24″ ASME B16.5,26″-42″ ASME B16.47;BW end ASME B16.25
  • Test and inspection: API 598, ISO 5208
  • Light torque, Bi-direction seal with zero leakage, one million times operating

Applicable standards

  • Design: API 609
  • Face to face: API 609
  • Flanged ends: ASME B16.5, ASME B16.47A, JIS, DIN EN1092
  • Testing: API 598
  • Operation: Bare shaft, lever operator, gearbox operator
  • Size range: 2”-60”, DN50-DN1500
  • Pressure rating: Class150-Class600, PN6-PN100
  • Body material: Carbon steel or alloy steel, for example, WCB, LCB, WC6, WC9, 2205, 2507, Monel, 20#, and so on
  • Seat material: PTFE, RPTFE, PPL
  • Connection type: Wafer, flange, lug
  • Temperature: -29℃ to 250℃


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.