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Two-way Sealing Butterfly Valve
Dual-clamp butterfly valve is an advanced valve in the short distance between flange poles of 2 pipes with unique design,new structure and outstanding performance.
1. It is light and small in size and easy to disassimble and repair;
2. It can be turned 90º swiftly when opening and closing, because of its simple and well-knit structure
3. It can save labour of itsshort moment of torsion
4. When flow characteristic curves trend towards direct, the adjustment performance is best
5. Over 10,000 tests of opening and closeing prove the longlift of it
6. It is all-sealed, the leakage of gas test reaches zero
7. All the parts and materials are changeable and suitable mediumis infinite
Usage
Forms of operation: Manual,worm wheel, electric pnumatic hydraulic ally. These valves can be used as regulation and throtting units on pipelines and containers with such media as all Kinds of corrosive and incorresive gases, liquids, semifuid and solid powder in them, Which be long to the pipe system of peteoleum, chemical, textile, shipbuilding and metallurgic industries; of food, medicine and paper manufctures; and of water and electricity, water supply and draiage and energy services. These valves can be ficed in any sected postion.
Triple offset butterfly valve
The seal principle of hard Seal Butterfly Valve triple offset
The Triple Offset Butterfly Valve provides a bi-directional bubble tight shut-off.This goemetry ensures that the disc seal contacts the body seat only at the final shut-off position without rubbing or galling,providing a torque generated resilient seal with sufficient"wedging" to ensure auniform seal contact.
The triple offset geometry
OFFSET1 The shaft is offset behind the seat axis to allow complete sealing contact around the entire seat
OFFSET2 The shaft centerline is offset from the pipe and valve which provides interference free opening and closing of the valve
OFFSET3 The seat come axis is offset from the shaft centerline to eliminate friction during closing and opening and to achieve uniform compressive sealing arount the entire seat.
Friction free sealing for long cycle life
(1)Seat is Cr13 matal alloy or hardfaced with Stellite as standard.
(2)The gasket is spiral wound SS/Graphite for zero leakage.
(3)Seat ring forces are generated by the torque during closing uniformly around the entire circumference.The resilent seal fleses and energizes,assuming the shape of the seat,The compression forces equally distributed around the perimeter provide a tight bi-directional shut off. The resiliency of the seal allows the valve body and disc to contract or expand,without the risk of jamming duo to temperature flunctuations.It is self-adjusting.
Weld Type Metallic Sealing Butterfly Valve