Double Block And Bleed Gate Valve

Double Block And Bleed Gate Valve

Nominal Diameter: 4"-20"
Pressure range: 150LBS,200LBS
Place of Origin: China
Power: manual,gear
MOQ: 1set

Product Details

     Double Block and Bleed Gate Valve



Why choose double block and bleed gate valve

DDB refers to the function of the valve to isolate the pressure at each inlet and empty the cavity between the valve seats. After releasing the cavity between the valve seats, the user can check out all the leakage sources on the valve seat without removing the valve from the pipeline. The choice of this kind of valve may be a requirement for operational safety factors, or it may be an area with extremely low tolerance for leakage and product fluid cleanliness, such as the natural gas industry. The double-closed double-bleed valve is characterized by two one-way valve seats. The two one-way valve seats can isolate the cavity between the valve seats and the pipeline pressure under the driven condition. If the pressure turns, the valve seat is forced to leave the valve body, so that the pressure in the valve body cavity is discharged to the piping system.





Material review of double block bleed gate valve


Part NoPart NameMaterial
1BodyWCB
2BottomQ235A
3Chock plug35#
4SlipQT500+fluororubber
5PlugWCB
6BonnetWCB
7Packing glandQ235A
8Packing sleeve2CR13
9YokeWCB
10Guide block45#
11Screw45#
12Stem1CR13

                                     




Drawing of double bleed block gate valve


drawing of double block and bleed gate valve





Size table of DDB gate valve

Operated by manual
Size(In)L
DD1D2BfABCHKD0Z-d
4457φ254φ200φ157322695480170175290φ3008-φ22
6559φ318φ270φ216372745518186205350φ35012-φ22
8686φ381φ330φ270422885606235260495φ45012-φ25



Operated by gear
Size(IN)LDD1D2BfABCHKD0Z-d
4457φ254φ200φ157322857532170175290φ3108-φ22
6559φ318φ270φ216372910569186205350φ31012-φ22
8686φ381φ330φ2704221011621235260495φ31012-φ22
10826φ445φ387.5φ3244821115695265348600φ31016-φ29
12965φ521φ451φ3815121201731315398670φ31016-φ22
14854φ584φ514.5φ4135421266784327461740φ31020-φ32
16889φ648φ571.5φ4705821625940432510810φ46020-φ35
181219φ711φ628.5φ53361219821130597550915φ46024-φ35
201219φ775φ686φ58464219941130610590940φ46024-φ35




International certificates: 

certificate of DDB gate valve





Product Process

product process of double block and bleed gate valve



Feel free to send your inquiry:

Attn: Lizy Liu

E-mail: sales2@kemus-valve.com

Mob/Webchat86-15960358834

Tel: 86-0592-7103069

Fax: 86-0592-5964598







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