High Performance Double Offset Butterfly Valve,The valve has two stems offset from the centre. It is capable of providing accurate, stable, throttle flow control.
High Performance Double Offset Butterfly Valve is a lower-cost valve option with benefits including high-quality to API 609, firesafe and they will seal against flow from either direction. The valves can be supplied in various materials of construction suitable for different service. Materials of construction to include exotic materials Aluminium Bronze (AB2), Super Duplex (SSDS), 6 Moly (6Mo), Hastelloy (C276) and Titanium (Ti). This valve type is suitable for the harshest offshore environment such as FPSO, fixed rigs or LNG carriers.
Size Range: DN50-DN3000
Pressure Rating:PN6 / PN10 / PN16 / 150LB/300LB
Body: Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529),
Disc: DI(Ni lined), WCB (A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2205/2507)
Seat: EPDM/NBR/VITON
Trim: 13Cr, Stainless Steel, Bronze
End Connection: Wafer, Lug, Flange
Actuator Options:Worm Gear, Electric Actuator, Pneumatic Actuator.
Metal Seated or Soft Seated
Bore：Full Bore
High Performance Double Offset Butterfly Valve, also known as high performance butterfly valve, is mainly used for water plant, power plant, steel smelting, chemical industry, water source engineering, environmental facilities construction and other systems drainage, especially for water pipeline, as a regulation and closure equipment. Compared with the center line butterfly valve, double eccentric butterfly valve is more resistant to high pressure, longer life, good stability. The larger the diameter, the lighter the material and the lower the cost compared to other valves. But because there is a butterfly plate in the middle, the flow resistance is large, so less than DN200 butterfly valve is not very significant.
Products features
1.Double eccentric butterfly valve is also called high-performance butterfly valve, which is mainly used for water drainage in water plants, power plants, steel smelting, chemical industry, water source engineering, environmental facilities construction, etc.
2. Fire-proof structure
Fire-proof valve is tested to API 607 4th Edition and BS 6755 Part II
3. Fixed Stem
Fixed collar is installed in the top of axis, 2″-24″(DN50-600), when axis breaks accident, avoid the upper part to move out of gland.
4. Provide CE marked versions available
CE marked and documented valves that conform to the European Pressure Equipment Directive (PED) 97/23/EC are available in ANSI Class 150/ 300, both standard and Fire-Tight construction. Operating torques, construction potions and valve dimensions are exactly the same as the standard ANSI 150/300 offering.
5. Convenient to maintain and upkeep valve seats
Replace axis only by taking inserts down, without disassembling disc and axis.
6. Excellent for both On-Off and Control Application
Superior control characteristics.
Inherent flow characteristic is modified equal percentage.
Wide range
Tight shut-off even in control applications.
Standard lugged style valves are suitable for bidirectional dead-end service at the full pressure temperature rating of the valve
7.Single-Source Responsibility
Purchase valves, actuators, and accessories, completely mounted from one source.
Available with electric, manual gear, and pneumatic double acting or spring return actuators and a variety of accessories including limit switch, solenoids, and positioners.
OEM service available through world-wide service centers.
8. Available in a Wide Choice of Material for a Broad Range of Applications
Standard body materials include ductile iron, aluminium bronze, carbon steel, stainless steel, Monel, Alloy 20. Users can also, according to requirements, select other materials.
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