Double Block and Bleed Valve (DBBV) by Control Seal

8/17/2019 Double Block and Bleed Valve (DBBV) by Control Seal

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DOUBLE BLOCK AND BLEED VALVES (DBBV)

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Control Seal Double Block and Bleed dual expanding Plug Valves (DBBV) respond to the market
demand for a non friction Double tight shut-o valve. Reduced space and no maintenance
requirements are met. Control Seal DBBV provides 100% bubble tight sealing both up and down
stream and is achieved mechanically - independent on line pressure.
SIZE: 1” ~ 48” (DN25 ~ DN1200) (up to unlimited based on approvals)
BORE: Reduced or Full (Full is piggable)
PRESSURE: 150# ~ 2500# (PN20 ~ PN420)
TEMPERATURE RANGE: -196°C ~ 250°C
CONNECTIONS: Wide choice on request
MATERIALS: Wide choice on request

General info

Company benefits

Design standards

How it works

Gallery

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8/17D/2B0B19V is a single valve solution used as repDlaoucbelemBelonctk oanfdtwBleoeidnV-alilnvee(DvaBBlvVe)sbywCitohntraoldSreaailn and/or bleed valve. Many
di erent valve type have been used in double configuration for blocking and bleeding, sampling or draining.
Traditional solutions can result in loss of product, frequent maintenance and even failure.

DBBV has two seated surfaces (slips). When the valve is in closed position each individual seal is fully
isolating, not allowing any leakage from downstream, upstream nor from the body cavity. A thermal
relief vents / bleeds the body cavity when overpressure occurs so the downstream pipeline is fully
isolated from upstream pressure without necessity for pressure balancing. 

Compared to other types of DBB valves, Double Block and Bleed plug Valve has the DIB - Double
Isolation and Bleed function and therefore it provides double security due to two seals that are
independent on each other.

 

The following BENEFITS arise from using SINGLE VALVE SOLUTION:

SPACE + WEIGHT REQUIREMENT REDUCTION

SHORTER DRAIN TIMES

ONE ACTUATOR INSTEAD OF TWO

 

CHARACTERISTICS

100% TIGHT SHUT OFF, therefore zero leakage. Provable by bleed system.

MECHANICALLY ENERGIZED SEALING without springs or other weak parts required to obtain sealing.

FRICTION-FREE OPENING AND CLOSING, no contact between slip seals and seating area during
rotation.   

NON LUBRICATED SEALING, media specific so seal material.

DUAL EXPANDING, proven zero leakage both up and downstream.

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https://www.controlseal.nl/valves/2-dbbv.html

8/17 /2019 Double Block and Bleed Valve (DBBV) by Control Seal
APPLICATIONS
Metering skids
Tank farms
Airports
Pipelines
Manifolds
Filling lines

© 2019 Control Seal All Rights Reserved

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