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Class 150~300 Butterfly Swing Check Valve
Features1. Small in size, light in weight, compact in structure, easy in maintenance.2. Two torsion springs are used excreting on each of the pair valve plates. Which close the plates quickly and automatically.3. The quick-close action prevents the medium from flowing back and eliminates water-hammer effect.4. This valve is short in length, so that it is rigid and easy to mount.5. It is easy to install on pipeline which is laid horizontally or vertically.6. This valve is tightly sealed without leakage under the pressure water test.7. Safe and reliable in operation, high interference-resistance.8. The connection dimensions of flanges accord with the standards of GB4216-84 GB4216.849. The face to face dimensions are in accordance with GB12221-89.ISO5752-82. The stem of the valve should be perpendicular to the horizontal level when the valve is mounted on horizontal pipeline. For vertical installation the direction of flow should be downward.
Product Details | |
Design and Manufacture | ANSI B16.34,API6D |
Face to face(end to end) | API6D |
Flanged connection | 2"~24"to ANSIB16.5,22",26"~36"to MSS-SP-44 to API605 on Request |
Test and inspection | API6D Shell test 150Lb 450 PSI 300Lb 1125 PSI Seat test 150Lb 315 PSI 300Lb 815 PSI(Hydrostatic)80PSI(Air) |
Materials for main parts
Part | WCB | A352 LCB | A217 WC6 | A217 WC9 | A217 C5 | A217 C12 | A351 CF8 | A351 CF8M |
Body | A216 WCB | A352 LCB | A217 WC6 | A217 WC9 | A217 C5 | A217 C12 | A351 CF8 | A351 CF8M |
Disc | A351 CF8 | A351 CF8 | A182 F11 | A182 F22 | A217 C5 | A217 C12 | A182 F304 | A182 F316 |
Stem | A182 F304 | A182 F304 | A182 F304 | A182 F304 | A182 F304 | A182 F304 | A182 F304 | A182 F316 |
Spring | Stainless steel | |||||||
Rubber Gasket | EPDM-46~+121 Neoprene-50~+150 NBR-35~+113 Fluororabber-23+150. | |||||||
Class 150~300 Butterfly Swing Check Valve