China Double Block and Bleed Plug Valve, DBB General Valve manufacturer, factory and supplier. Double Block and Bleed Plug Valve is superior to common gate and ball valves in terms of its sealing performance and service life. Double Block and Bleed Plug Valve has the functions of being fireproof, on-line maintenance, double block and bleed, cavity pressure relief, internal leak detection and others.
Illustrate the Double Block and Bleed Plug Valve functions and applications in the oil and gas storage and transportation systems in combination with examples, which has opened new development potential for process design of oil and gas storage and transportation systems and solved many problems encountered in pipeline design. Double Block and Bleed Plug Valve has not only optimized the pipeline design and improved the product quality but also saved the pipeline operation costs.
Double Block and Bleed Plug Valve is positive shut-off frictionless seating isolation valves with a selection of bleed systems to proof the sealing integrity of the valve. Normally this can only be achieved by using two valves and a spool piece with a drain valve. The use of a Double Block and Bleed Plug Valve will save cost, space and maintenance for a long period.
Double Block and Bleed Plug Valve specification
1. Pressure scope :CLASS 150Lb~1500Lb
2. Nominal diameter : NPS 2~36″
3. Design standard :API 6D
4. Port : Full bore /Reduced bore
5. Body material:A105､LF2､F304､F316､F304L､F316L､F51,WCB､LCB､WCC､CF8､CF8M､CF3､CF3M､A890 4A etc.
5. End connection :RF RTJ BW
6. Drive device: Lever, Gear box, Electric, Pneumatic, hydraulic device, Pneumatic-hydraulic device
Double Block and Bleed Plug Valve feature
1. During the opening and closing of the Double Block and Bleed Plug Valve, there is no contact between the sealing surface of the valve body and the sealing surface of the sliding vane. Therefore, the sealing surface has no friction and wear, the service life of the valve is long, and the switching torque is small
2. During the maintenance of the Double Block and Bleed Plug Valve, it is not necessary to remove the valve from the pipeline, just open the bottom cover of the valve and replace a pair of sliding pieces, which is very convenient for maintenance
3. Double Block and Bleed Plug Valve body and cock are of full diameter, the medium has no flow resistance when passing through, and the pipeline can be cleaned, which overcomes the shortcomings of reducing valve.
4. The inner cavity of the Double Block and Bleed Plug Valve is plated with hard chromium, and the sealing area is hard and smooth, which is the premise of ensuring the sealing performance.
5. The elastic seal on the slide is made of fluororubber and molded in the groove of the slide surface. The metal to metal seal with fireproof function is used as the backing of the elastic seal
6. Automatic relief device can be selected for the valve to prevent abnormal pressure rise in the valve chamber and check the effect of the valve after the valve is completely closed.
7. The Double Block and Bleed Plug Valve switch indicator is synchronized with the switch position, which can accurately display the valve switch status.
