- Dual-plate Check Valve Home >> Products >> Check valve
- Detailed introduction
- Design and Manufacture: ANSI B16.34, API 6DFace to face: API 6DFlanged connection: 2"~24" to ANSI B16.5, 22",26"~36"to MSS-SP-44 to API 605 on RequestTest and inspection: API 598, API 6DShell test 150Lb 450 PSI, 300Lb 1125 PSISeat test 150Lb 315 PSI, 300Lb 815 PSI (Hydrostatic), 80PSI(Air)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.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.
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