Double Block And Bleed Ball Valve

GMK double block and bleed valves offer the highest level of protection possible in double isolation and bleed service. These valves combine two in-line isolation valves into a single body and include an additional bleed valve that is used to empty or vent fluid that is trapped in between the two obturators. This design allows for the maximum degree of safety possible in double isolation and bleeds service. When transferring liquids and gases, using one valve that combines the functions of a block and bleeds rather than two separate valves results in more space-efficient piping and much-reduced air loss. There is a wide range of one-of-a-kind alternatives available, each of which offers cutting-edge technology solutions. It is possible to tailor the material choices to the specific requirements of unique projects.

  • Size:1/2″-24″
  • Rating:150LB,300LB,600LB,900LB,1500LB
  • Material:A105,WCB, LCB,LCC, WC6,WC9, C5,C12,C12A, CF8, CF8M, CF3, CF3M, CK20, CN7M, CD4MCu, CK3MCuN, Cu5MCuC, CN3MN, M35-1,B148 ect
  • Connection:RF Flanges,RTJ Flange,Butt Weld,Hub end,Groove
  • Operation:Hand lever, Gearbox, Penumatic Actuator

CE Certification

ISO Standards

Warranty Included


A double block and bleed valve is used whenever there is a need for bleeding the cavity of the valve, whether it be for primary or secondary isolation. The extensive selection of twin block bleed valves makes it possible to create pipe systems that are superior and more cost-effective. Although double block and bleed valves find the most widespread use in the oil and gas sector, their usefulness extends to a wide range of other sectors as well.


  • When a single pair of double block and bleed valves may be sufficient to complete the task at hand, it is not required to add three separate valves into the system. 
  • Because of the piping system’s decreased size and weight, there is less strain placed on the pipes. 
  • Additionally, the amount of time required for installation is reduced, and the number of possible leak channels is cut down significantly.


Size 1/2″-24″
Rating 150LB,300LB,600LB,900LB,1500LB
Material A105,WCB, LCB,LCC, WC6,WC9, C5,C12,C12A, CF8, CF8M, CF3, CF3M, CK20, CN7M, CD4MCu, CK3MCuN, Cu5MCuC, CN3MN, M35-1,B148 ect
Connection RF Flanges,RTJ Flange,Butt Weld,Hub end,Groove
Operation Hand lever, Gearbox, Penumatic Actuator
Supply Ability 10000 Piece/Pieces per Month
Port Wenzhou/shanghai
Payment Terms L/C,D/A,D/P,T/T


  • Double block and bleed design(DBB)
  • Floating ball or Trunnion mounted ball
  • With two ball and one bleed valve, Anti-blow out stem
  • Dual ball is a necessary requirement when maintenance is taking place down stream of the first isolation valve
  • Cavity venting is provided by either two balls or globe OS&Y vent relief valve so that the pressure between the two isolation valves can be safely vented
  • Full Port Or Reduced Bore
  • Light weight,In case of large production can greatly enhance the work efficency.
  • Fire safe design and Anti-Static device
  • ISO 5211 mounting design upon request
  • NACE MR-01-75
  • Central Needle Vent Valve
  • Floating Metal or Soft Seat
  • Low Pressure Loss Through the valve
  • Low Actuation Torque


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.