DBB Plug Valve

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DBB Plug Valve

Vatac Double Block & Bleed (DBB) Valves Designed to meet Oil & Gas transmission, loading, unloading needs. Line sealing is achieved
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Description

Vatac Double Block & Bleed (DBB) Valves 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.

Standards Compliance and Design Features:
» 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 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

Send Inquiry

Please feel free to contact with us at Vatac@vatacvalve.com or filling up an enquiry form instructed at the bottom,
You will get an effective response within 24 hours from Vatac sales representative.
Thanks for your valued time with interest!

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