Industrial Control Valve Types: A Complete Guide to Process Control Valves
Quick Answer: Control valves regulate flow, pressure, temperature, and level. Main types: globe control valves (general process), angle control valves (high pressure drop), self-operated regulators (no instrument air), and rotary control valves (large flows).
| Type | Flow Characteristic | Application |
|---|---|---|
| Globe Control | Linear or Equal % | General process control |
| Angle Control | Linear | High DP, erosive |
| Self-operated | Proportional | Pressure reduction |
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Sizing: Calculate Cv based on flow rate, pressure drop, fluid properties. Undersized = cannot deliver flow. Oversized = erosion and poor control. Contact engineering for sizing assistance.
FAQ
Q: Control valve vs regular valve?
A: Control valves modulate continuously with positioners/actuators. Regular valves are for manual operation.
Q: Which actuator?
A: Pneumatic (most common), electric (no instrument air), hydraulic (very high thrust).
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