API 609 is the American design standard forbutterfly valves, which is divided into Category A and B.

Category A valves are "concentric" type. Also known as rubber lined butterfly valves. These are popular in low pressure systems (Class 150 or less), relatively lower cycle life, rubber liners are also good for abrasive slurry services.

Category B valves are "offset" type, meaning the shaft is offset from the disc, so they can handle higher differential pressures. Most of the offset types cause the disc to rotate freely from the seat after a few degrees of rotation, which minimizes seat wear and increases valve cycle life. The offset type can have rubber, polymer (PTFE or other), metal &graphite, or even metal seats. Lots of variety which makes these suitable for a variety of temperatures and pressures.

FEIDA VALVE is the top ranking China double offset butterfly valve manufacture. The annual output of high performance butterfly valve is more than 100,000,000 set.

The API 607 fire safe high performance 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 VALVE 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 workshop, FEIDA also produce the food-grade valves. FEIDA food-grade valve is certificated by Food and Drug Administration United States (FDA).

If you are interested in valves, you can contact us directly, email:ethan@feidavalve.com

Varyity type of FEIDA High Performance Butterfly Valve:

ENDs：

high performance butterfly valve lug

high performance butterfly valve semi lug

high performance butterfly valve wafer

high performance butterfly valve flange

high performance butterfly valve fire safe

lug double offset butterfly valve

semi lug double offset butterfly valve

wafer double offset butterfly valve

flange double offset butterfly valve

Function：

Fire safe high performance butterfly valve / double offset butterfly valve

PSA high performance butterfly valve / double offset butterfly valve

VPSA high performance butterfly valve / double offset butterfly valve

Food grade high performance butterfly valve / double offset butterfly valve

Air separation high performance butterfly valve / double offset butterfly valve

Pressure：

high performance butterfly valve Class 150

high performance butterfly valve Class 300

high performance butterfly valve Class 600

Operation：

punamtic high performance butterfly valve

electrical high performance butterfly valve

Material：

carbon steel high performance butterfly valve

stainless steel high performance butterfly valve

c95800 high performance butterfly valve

Nickel aluminum bronze high performance butterfly valve

Hastelloy high performance butterfly valve

2205 high performance butterfly valve

duplex stainless steel high performance butterfly valve