Butterfly Valve By Lishui Y & B Valve Co., Ltd.

The butterfly valve is a kind of valve that adopts the round butterfly board as the disc and opens, closes and regulates the flow channel through the rotation of stem. The butterfly board of the butterfly valve is installed at the diameter direction of the pipe. The butterfly valve has such features as simple structure, economic material consumption, small volume and light weight.
With small installation dimensions, low driving torque, convenient and rapid operation, rapid opening and closing can be realized just through a rotation of 90A . In addition, it has good flow regulating function and closed sealing performance. In the fields for large & middle sizes and low & middle pressure, the butterfly valve is a leading valve form. Y&B Company has developed series of central line butterfly valves, double-eccentric butterfly valves and three-eccentric butterfly valves with complete varieties and specifications ranging from 2" to 80" for customers to select. The body materials of the butterfly valves of Y&B Company include carbon steel and ductile iron. The sealing surface can be PTFE, EPDM, NBR soft seals or metal seal.

a Design basis: API609, JBT3595-2002
a Socket welding ends: ASME B16.11
a Threaded ends: ASME B1.20.1
a Butt-welding ends: ASME B16.25
a Face-to-face dimension: ASME B16.10, GB12221
a Inspection and test: API598, API6D, JB/T9092
a Pressure rating: Class150~600, PN16~PN40
a Product range: 2"~80", DN50~DN2000
a Materials of main pa