A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk.

Hebei Tongchan is a professioinal Butterfly Valve manufacture in China. We mainly supply resilient seated butterfly valves. 

The types of the butterfly valves we can supply contain Wafer type butterfly valves, Lug type butterfly valves, and double flanged butterfly valves. Thereinto, the flanged butterfly valve have long type and short type.

Take Wafer type butterfly valves as an example. I’d like to make a brief introduction:

Wafer Type Butterfly Valve Resilient Seated(Our Series F101)
Structure: Centerline Design & One Shaft With Pin
Connection Standard: ANSI, DIN, BS & JIS
Working Pressure: 0.6MPa to 1.6Mpa
Size: 1 1/2” to 48”
Operator: Lever, Gear Box, Pneumatic & Electric Actuator

Materials:
Body: Cast Iron, Ductile Iron (Nickel Plated or Nylon Coated), Stainless Steel, WCB
Disc: Ductile Iron (Nickel Plated or Nylon Coated), Stainless Steel, Al-Bronze
Seat: EPDM, NRB, PTFE, VITON
Shaft: Stainless Steel, Carbon Steel

In the pharmaceutical, chemical and food industry a butterfly valve is used to interrupt product flow (solid, liquid, gas) within the process. Butterfly valves generally replaced ball valves in many industries particularly petroleum due to lower cost and ease of installation, but pipelines containing butterfly valves cannot be 'pigged' for cleaning.