I. Features of Electric Control Valves

1. Light weight, attractive appearance.

2. Versatile, simplified design, easier management and maintenance.

3. Large rangeability up to 100, stable regulation from 10%–90% opening.

4. Stable operation, high reliability, solves leakage problems.

5. Excellent shut-off performance, nearly zero leakage.

6. Good pressure resistance, anti-clogging, simple flow path, high Kv value, self-cleaning.

7. Approximate equal-percentage flow characteristic, energy-saving.

8. Powered by electricity, no air supply needed, convenient and economical.

9. High precision (resolution 1/1000), low operating cost, maintenance-free.

10. Optional PTFE or ceramic lining for high corrosion & wear resistance.

II. Features of Pneumatic Control Valves

1. High-strength aluminum cylinder, long service life, low friction.

2. Compact modern design, cost-effective.

3. High-quality bearings, low friction, quiet, long life.

4. External stroke adjustment ±5°.

5. Die-cast aluminum piston & end cap, light and strong.

6. Suitable for high/low temperatures with different seals.

7. Multi-turn and three-way actuators available.

8. Simple control, intrinsically safe, explosion-proof without extra measures.

9. Lower accuracy and sensitivity to be improved.

Summary

• Electric: 0.3% error & sensitivity, no air supply, not for high-explosion areas.

• Pneumatic: 0.5% error & sensitivity, needs air supply, intrinsically safe, ideal for high-explosion sites.

Selection Guide

1. Cost: Pneumatic valves are cheaper.

2. Application: Pneumatic is widely used in chemical & petrochemical industries (explosion-proof, low failure rate); electric is preferred in power plants.

3. Speed: Pneumatic acts faster; electric is slower.

4. Precision: Electric has higher precision and built-in functions.

5. Auxiliaries: Pneumatic needs compressor and signal converters.

6. Usage: Electric suits smooth, stable high-pressure water systems.