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What is the characters of a double offset butterfly valve

Feb 25,2020

THE Double Offset High Performance Butterfly Valve

The double offset butterfly valve is also known as a high performance butterfly valve. The high performance butterfly valve has two stems offset from the center.  This creates a cam action during the application's process.

  • 1st offset: The axis of the shaft is behind the centerline of the sealing point of the disc to seat.
  • 2nd offset: The axis of the shaft is eccentric to the center of the valve/pipe line.

The double offset high performance butterfly valve is generally used in:

  • Power generation
  • Pulp and paper
  • HVAC
  • Chemical
  • Oil and gas
  • Water and wastewater treatment
  • Shipbuilding

Double offset butterfly valves are available in higher pressures than the zero offset style.  The double offset is up to ANSI Class 600 rating in carbon steel, stainless steel, Hastelloy and other body material, with variations of Teflon seats and also Fire Safe design with metal back up seats.

FEIDA is specialized in High Performance Butterfly Valve for more than 15 years. There are 2 main facilities includes 2 valve assembly & testing factories, 1 large CNC machinery plant, 1 investment casting foundry (3000T/Y) and 1 valve R&D center, equipped with most advanced production equipment and testing equipment.

The fire safe butterfly valve is also in FEIDA VALVE product range. Our fire safe butterfly valve is certificated by American Petroleum Institute (API) according to API 607 standards.

FEIDA also build up a dustless workshop to produce ultra-clean valve for some critical working condition such as nuclear industry, semiconductor industry etc.

In the dustless workshp, FEIDA also produce the food-grade valves. FEIDA food-grade valve is certificated by Food and Drug Administration (FDA).

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