121 Series Angle Diaphragm Valve
Function Principle
Diaphragm is arranged between the valve body and the bonnet to isolate the medium in place of the stem packing. Valve stays closed(open) by spring force in its normal state. When piston is actuated by compressed air, valve becomes opened (close). For double acting type, valve is opened and closed by compressed air.
Advantages
1. Diaphragm is used to isolate the medium, avoiding valve stem from seizing due to medium crystallization or being viscous with particles.
2. Stainless steel actuator, better performance for harsh environments and can rotate 360°.
| Operating pressure | 0-10bar (0-145psi) |
| Control pressure | 4-8bar (58-116psi) |
| Control fluid | Filtered compressed air or neutral gas |
| Body material | CF8/CF8M/CF3M and other special materials |
| Seal material | PTFE |
| Actuator material | CF8 |
| Actuator size | 40mm, 50mm, 63mm, 90mm |
| Applicable fluid | Water, Oil, Neutral gas or Liquid, |
| Organic solvent, Acid and lye | |
| Fluid temperature | -10℃ — +150℃ |
| Ambient temperature | -10℃ — +80℃ |
| Control type | Single acting normally closed, |
| Double acting normally closed | |
| Connection type | Threaded, Welded, Tri-clamp, |
| Leakage class | EN 12266 Class A |
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