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Double Block and Bleed Plug Valve

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  • Double Block and Bleed Plug Valve
  • Twin Seal Valve
  • DBB Plug Valve
  • General Valve

Double Block and Bleed Plug Valve

Rapid seal abrasion is inherent in the designs of most ball and gate valves. AFC GENERAL VALVE Twin Seal double block-and-bleed (DBB) plug valve reduces this constant wear by using two seating slips mounted independently on a tapered plug by dovetails, which mechanically retract from the seating surface prior to rotating. This provides a bubble-tight verifiable dual seal without seal abrasion.
AFC DBB expanding plug valves are ideally suited for product isolation, refining, fueling, metering, terminal and storage applications.
• API 6D MONOGRAMMED
• HIGHEST QUALITY PLUG VALVES AT THE BEST POSSIBLE PRICE
• DELIVERED TO EXACTING CUSTOMER SPECIFICATIONS AND REQUIREMENTS
• ENGINEERED, ASSEMBLED AND TESTED FOR YEARS OF TROUBLE FREE SERVICE

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Description

Features that Add Value

– AFC Double Block & Bleed Plug Valve provides online-verifiable bubble tight sealing and is a safe and reliable replacement to the

conventional two-valve system

– High integrity positive shut-off obtained independent of line pressure, without sealants/ lubricants

Mechanical sealing ensuring online-verifiable positive double isolation for critical services

– Patented operator mechanism enables segments to move towards the seats during valve operation – reduces wear and tear and enhances service life

– Inbuilt cavity pressure relief system

– Inline Maintainable Seats -Seats can be renewed without removing the valve from the pipeline (after draining and isolating the line)

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

 

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