WCB CF8 CF8M Pneumatic Diaphragm Control Valve with Positioner - DN20-300, 1.6-6.4 MPa, -200°C to +560°C Temperature Range
Precision pneumatic diaphragm control valve designed for accurate regulation of pressure, flow, and liquid level in industrial processes. Available in single seat, sleeve, and double seat configurations with compact design and reliable performance.
| Port Size DN (mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flow Coefficient Kv (Linear) | 1.8 | 2.8 | 4.4 | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 |
| Flow Coefficient Kv (Equal %) | 1.6 | 2.5 | 4.0 | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 400 |
| Parameter | Specification |
|---|---|
| Rated Stroke (mm) | 10, 16, 25, 40, 60, 100 |
| Membrane Effective Area (cm²) | 280, 400, 600, 1000, 1600 |
| Signal Range (KPa) | 20-100, 40-200 |
| Air Source Pressure (KPa) | 0.14-0.4 |
| Flow Characteristics | Linear and Equal Percentage |
| Inherent Adjustable Ratio | 50:1 |
| Leakage Rate | Hard Seat: Class IV; Soft Seat: Class VI |
| Nominal Pressure PN (MPa) | 1.6, 4.0, 6.4 |
| Working Temperature Range (°C) | -200 to +560 |
- Linear input-output characteristics with precise displacement control
- Six stroke specifications from 10mm to 100mm
- Membrane effective area proportional to thrust output
- Positive and negative action actuator configurations
- Spring force adjustment capability for thrust optimization
- Optional self-locking device for position retention
- Compatible with valve positioners for enhanced control
- Displacement conversion for angular rotation applications
- Manual hand-wheel mechanism for backup operation
Ideal for precise control of process parameters including pressure, flow rate, and liquid level in gases, liquids, and other media. Suitable for applications requiring minimal leakage with moderate pressure differentials across the valve.
Standard, regulating cut-off, pipe sealing, and jacket insulation types. Temperature ranges from -200°C to +560°C with various leakage rate standards and flow characteristics.
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