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High Quality Triple offset butterfly valve BW China Manufacturer/ Supplier/ factory

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Triple offset butterfly valve BW ,high performance

NORTECH Valves offers a comprehensive range of Triple-offset Butterfly Valves
in a variety of body styles and materials to address critical process
requirements in diverse industries such as hydrocarbon, power, chemicals &
fertiliser, water, etc.

Design and Manufacture standard:API609

Face to face:ANSI B 16.10

Temperature and pressure ASME B 16.34

Pressure rating ANSI 150/300/600/900


Materials:Carbon steel/Stainless steel/Monel/Hastelloy etc

Seat:Multi-layer or metal-metal

NORTECH is one of the leading China Triple offset butterfly valve BW Manufacturer & Supplier.

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what's Triple offset butterfly valve BW ?

Triple offset butterfly valve BW ,also known as triple offset butterfly valve,is one kind of high performance butterfly valves,designed for working conditions of high pressure,high temperature,and high frequencies of open and close.

Concentric rubber lined butterfly valve,with mature design and manufacturing technology,are reliable in quality and friendly in cost.But for severe applications such as high temperatures or at high opening and closing frequencies,it’s not allowed to use the soft seat butterfly valves.So the hard seal butterfly valves,metal seat or ceramic seat,designed for high temperature,high pressure or high frequencies of open-shut,came into use,but the sealing performance of the traditional hard seal butterfly valve was always a big concern.

Triple eccentric butterfly valve (also known as triple offset butterfly valve) has been invented in this case.

the zero leakage of our triple eccentric butterfly valve is implemented by the composite stainless steel sealing ring mounted on the disc. The design of right-angled rotation with zero friction is implemented by the distinctive triple eccentric principle. It eliminates the friction between the seat and the sealing ring in 90º rotation,Smaller torque means we can start the valve with a smaller actuator,to save a lot of cost and space.

Triple eccentric butterfly valve

Main features of Triple offset butterfly valve BW

  • Fire-resistant all-metal construction.
  • Stellite® grade 6 seat overlays provide excellent durability.
  • Open/closed disc references and external disc position indicator simplify installation/removal procedures to API 609.
  • Composite metal seal ring ensures perfect seating force distribution around precision-machined seat circumference.
  • Flange spot facing ensures bolting nut and washer planarity, increasing joint reliability and safety.
  • Easily replaceable multi-layered duplex and graphite seal rings.
  • Highly strengthened one-piece shaft designed to transfer/maintain torque efficiently.
  • Braided graphite bearing protectors prevent dirt intrusion, ensuring constant running torque and valve operability.

Technical specifications of Triple offset butterfly valve BW

Design  API 609/ASME B16.34
End Connection  Wafer type,Lug type,Flanged type,Buttweld type
Operation  Manual/Pneumatic/Electric
Size Range  NPS 2"-60"(DN50-DN1500)
Pressure Rating  ASME Class150-300-600-900(PN16-PN25-PN40-63-100)
Flange standard
 DIN PN10/16/25, ANSI B16.1, BS4504, ISO PN10/16,BS 10 Table D, BS 10 Table E
Face to face
 ANSI B16.10,EN558-1 Series 13 &14
Temperature  -29℃ to 450℃(depending the materials chosen)

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Appilcation: Triple offset butterfly valve BW

This kind of  Triple offset butterfly valve BW  is suitable for handling the wide range of fluids in oil & gas, petrochemical, chemical, coal, desalination, waterworks, food & beverage industries. Also for solar, geothermal and hydro power, fossil fuels, district heating, mining, shipyards and the aerospace sectors.


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