Pneumatic Diaphragm Eccentric Rotary Globe Control Valve (PRV)
General
The Eccentric rotary control valve consists of a straight-trough valve body with minimal flow resistance and an open yoke plug with a wing that rotates eccentrically. It is suitable for applications requiring a large flow capacity and wide range ability, and for the control of those slurry fluids susceptible to clogging. The actuator is pneumatic diaphragm type, also available piston and electric actuator.
The main features are as follows:
- Good sealing performance.
- Large flow coefficient.
- High stability of two kinds of dynamic.
- Wide application temperature.
- Compact, light weight, easy for installation.
- Valve body flow is simple, suitable for high viscosity and granular medium.
Parameter
| Actuator | Pneumatic Diaphragm Actuator, Piston, Electric optional |
| Control | DCS with Valve Positioner |
| DN | 25~300mm (1"~12") |
| Pressure | PN1.6~6.4Mpa, ANI150~600Lbs, JIS10~40K |
| Temperature | -195~400°C |
| Flow characteristics | Equal Percentage (EQ%), Linear (L) |
| Rangeability (R) | 100:1 |
| Leakage class | Metal Sealing: Class IV grade Soft Sealing: Class VI grade |
| Connection | Wafer |
| Structure | Standard Type |
| Body & Cap Material | WCB, WCC, WC6, CF8, CF8M, CF3M |
| Stem Material | 304, 316, 316L 17~4PH |
| Spool Material | 304, 316, 316L, 17~4H, Surfacing Stellite |
| Packing Material | PTFE, RTFE, Flexible graphite |
| Medium | Gas, Liquid, Steam and etc |
| Accessories | Positioner, Air Set (AFR), E/P Converter, Safty Valve, Limit Switch, Solenoid Valve |
| Remark | Commissioning has been completed in the factory |