DBBV is a single valve solution used as a replacement of two in-line valves with a drain and/or bleed valve. Many different valve types 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. 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, 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 soft seal material.
DUAL EXPANDING, proven zero leakage both up and downstream.
THE SELF-LOCKING OPERATING MECHANISM on all valves secures the closing member from rotating due to in-line forces. As a result there is no danger of line slam or shock.
APPLICATIONS
Metering skids
Tank farms
Airports
Pipelines
Manifolds
Filling lines
