GMK Double Eccentric Butterfly Valve

Engineered with two eccentric butterfly valves, our GMK double eccentric butterfly valves are built to last. The optimized seal design, the corrosion-protected shaft end zones, and the slanted, securely fastened disc all set new benchmarks in the industry. After the disc has opened a small amount, the tension is released, reducing the amount of wear on the disc seal. In addition, the design ensures low operating torques by reducing the compression of the sealing. A key and keyway are used to join the disc to the shaft. To counteract the jiggling that can occur due to the combination of fluid velocity and the inherent slack in the key and keyway, two set screws are employed to keep the key firmly in place. Due to its large size, the disc is fastened by two stainless steel drive dowels, with a key and keyway as a backup. The integral seat design incorporates a ductile iron seat that has been machined and coated with epoxy. With this stainless-steel seat design, leaks under the seat ring are prevented with a stainless-steel seat ring that can be replaced and is sealed with an O-ring. The disc seal was designed to keep the fixation in place securely, making it an excellent choice for this application. Thanks to the high quality of the rubber, it may be used in fewer quantities, resulting in less closing torque.

  • Size:2″-80″
  • Pressure:150LB, 300LB, 600LB, 900LB
  • Material:Cast iron, ductile iron, WCB, LCB, LCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, B148 ect
  • Connection:Wafer type, lug type, flange, BW
  • Operate:Handwheel, gearbox, penumatic actuator
Butterfly Valve
Butterfly Valve

CE Certification

ISO Standards

Warranty Included



Taking advantage of a GMK double eccentric butterfly valve’s benefits in many ways such as:

  • An O-type ball valve’s foundation was expanded upon to create the double eccentric butterfly valve. It is both a shut-off and a control valve, eliminating the need for two separate devices. It is also smaller and more compact than an O-type ball valve of the same size.
  • In cases where crystallization and coking are frequently operated, double eccentric butterfly valves outperform O-type ball valves in terms of both their working range of the medium and their use effect and service life.


  • Double eccentric structure
  • Metal to metal seat
  • High-temperature services, high-pressure resistant, corrosion-resistant
  • Both have adjusted and shut-off function
  • Fire-safe, Bi-direction seal
  • Easy installation and maintenance. It can be mounted wherever needed
  • Top flange ISO5211 for optional
  • Long service life, and energy-saving
  • Low maintenance costs
  • Small volume, lightweight



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: API609, MSS SP-67
  • Pressure-temperature rating: ASME B16.34
  • Face to face(end to end): ANSIB16.10
  • End connection: 2″-24″ ASME B16.5; 26″ -42″ ASME B16.47
  • BW end connection: ASME B16.25
  • Test and inspection:API598, ISO5208
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.