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Product Name:Class 150~2500 Dual-plate Check Valve
Class 150~2500 Dual-plate Check Valve
  
Standards compliance 
Design and Manufacture: ANSI B16.34, API 6D
Face to face: API 6D
Flanged connection: 2"~24" to ANSI B16.5, 22",26"~36"to MSS-SP-44 to API 605 on Request
Test and inspection: API 598, API 6D
Shell test 150Lb 450 PSI, 300Lb 1125 PSI
Seat test 150Lb 315 PSI, 300Lb 815 PSI (Hydrostatic), 80PSI(Air)
For higher pressure request, please feel to contact us for technical literature.
 
Features
1. 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 GB4216.84
9. 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.
10. Wafer ends, available with flanged ends, Welco Valve can also produce the size up to 56" and the pressure will be higher than Class 600.

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
Gasket
EPDM, NBR, PTFE
If you are interested in this item, please contact us for more information.
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