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The open-close piece of the valve is a round-disk butterfly board and by rotating around the axis of its own inside of the valve body, carries out the open-close or adjusting functions. It features by:
1、Simple structure, small volume and light weight
2、Quick open-close, labor saving and small fluid resistance
3、Good adjustable performance, can be adjusted flexibly within 0~900, suitable for the pipeline of water supply and drainage, high buildings, fire-fighting, petroleum, chemical industry, medicine, food industries etc. to act as open-close or adjustment.
a. Standards of design ：JB/T8527、API1609、JIS B2064
b. Standards of flange：GB9115
c. Structural length： GB12221、GB/T15188.2
d. Testing standards: GB/T13927、JB/T9092
| DN(mm) | 50~3000 | |||||||
| PN(MPa) | 0.25 | 0.6 | 1.0 | 1.6 | ||||
| Test pressure (MPa) |
Shell test | 0.375 | 0.9 | 1.5 | 2.4 | |||
| Sealing performance | 0.275 | 0.66 | 1.1 | 1.76 | ||||
| Applicable medium | Water、 Steam、 Oil、 Sea-water、 acid | |||||||
| Working temperature(℃) | J NBR | Ethylene-propylene rubber | PTFE | Silicon rubber | Flu rubber | |||
| -20~+80 | -40~+150 | -40~+150 | -70~+25 | -15~+250 | ||||
Name of parts |
Material |
| Body | C.l, Ductile iron, No25, WCB, Stainless steel |
| Butterfly board | C.l, Ductile iron, No25, WCB, Stainless steel |
| Stem | Grade , WCB, Stainless steel |
| Sealing face | Neoprene, NBR, EPOM, PTFE |
| Packing | PTFE , Flexible granite, NBR, V washer |
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Address: Zone Y No.1957 Jiaotong Road, Shanghai 200065, China
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