Manual DBB Plug Valve

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Vatac Valves (Quzhou) Corp is one of the best China manual dbb plug valve manufacturers, welcome to wholesale cheap manual dbb plug valve from our factory.


Manual DBB Plug Valve




DBB Plug Valve

VATAC Double Block & Bleed(DBB) plug valves are designed to provide positive shut-off, verifiable zero leakage and DB&B capabilities. They are also designed to meet Oil & Gas transmission, loading, unloading needs. Line sealing is achieved by body and wedges cut from each side of the plug with or without the assistance of soft seat rings. The sealing is positively made on each side of the plug(double block), and the media kept in the plug port area can be bled into upstream or to the container to prevent from explosion. The Valve can be used for assuring metering accuracy and SCADA systems.

The small size Double Block and Bleed valves are handwheel operated and the larger sizes are equipped with waterproof of gearing but operate in the same manner, proportionately requiring more turns. Turning the handwheel rotates the wedge 90 degrees, aligning the seating slips. The elastomer seal rings are Seating integrally bonded within the machined groves of each slip.

As the wedge lowers, it force the seating slips outwards, pushing the seals against the body and compressing them with in the grooves. With the slips solidly against the body, a secondary metal-to metal seat is formed on both sides of each seal, providing double protection. The wedging forces the seating slips outwards against the valve body and is

perpendicular to the seats and the body. This eliminates all scraping and rubbing forces on the seals.

When opening, the wedge moves upwards and the dove-tailed (slips) are pulled away from the body. The wedge is guided by an upper and lower trunnion, and the wedge is rotated 90 degrees, aligning the seating slips. In the open position, the seals are completely out of the flow. Again, This action eliminates all scraping and rubbing forces on the seals.

» Design Standard: API 6D,

» Flanged Ends: ANSI B16.5

» Face to Face: ANSI B16.10

» Testing: API 6D 

» Rating : ANSI Class 150/300/600/900/1500

» Size : 2”~ 24”

» Temperature Range : -20 Deg F(-29 Deg C) TO + 350 Deg F(+176.7 Deg C)

» A variety of body and trim material is offered, including carbon steel, Low Temp. Carbon Steel, Alloy Steel, Stainless Steel, Duplex & Super Duplex Steel etc. Coatings may be provided for added corrosion or wear resistance. Hard-facing and weld overlays may also be supplied. Seats Options with metal-to-metal or bubble-tight resilient.

» Connections : Flanged, Screwed, Welded (Butt, Socket)

» Hand wheel, enclosed gear operated or actuated

Vatac offers DBB Plug Valves including, but not limited to 

? Manual DBB Plug Valve ? Actuated DBB Plug Valve


Manual DBB Plug Valve

Vatac Manual DBB Plug Valve or Twin Slip Double Block and Bleed valve, there is an up-stream and down-stream seal, as well as a bleed point in between. This one D.B.B. may be substituted for two valves with one spool (drain). The spool sends any leaking fluid from the valve to the tank. The bleed system on the double block and bleed is provided to prove zero leakage. The ensures that if any leakage was to occur, it would be eliminated via the bleed. This in turn, guarantees complete and total product segregation, are widely used for critical areas such as refinery, distribution center, Loading arm and air ports.

» Design Standard: API 599,

» Flanged Ends: ANSI B16.5

» Face to Face: ANSI B16.10

» Testing: API 6D 

» Rating : ANSI Class 150/300/600/900/1500

» Size : 2”~ 24”

» Temperature Range : -20 Deg F(-29 Deg C) TO + 350 Deg F(+176.7 Deg C)

» A variety of body and trim material is offered, including ASTM A216 WCB, WCC, LCB, LCC, WC6, WC9, CF8, CF8M, CF3, CF3M, A890 GR. 4A, 5A or F51 etc. Coatings may be provided for added corrosion or wear resistance. Hard-facing and weld overlays may also be supplied. Seats Options with metal-to-metal or bubble-tight resilient.

» Connections : Flanged, Screwed, Welded (Butt, Socket)

» Hand wheel, enclosed gear operated



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