The YEPEF 2SDQ(B) series non-intrusive quarter-turn valve electric actuators were developed on the basis of imported German Siemens technology for the open/close and modulating control of quarter-turn valves — butterflies, balls, dampers and louvers. They serve power stations, petrochemical, water supply and drainage, shipbuilding, and municipal engineering; the explosion-proof versions work in Class Ⅱ A/B, temperature groups T1~T4 explosive-gas atmospheres.
1. Compact, small and light — die-cast high-strength aluminum-alloy housing;
2. Fully automatic hand/electric changeover;
3. Mechanical torque protection and mechanical limits;
4. Non-intrusive design — user commissioning without removing covers;
5. Single-turn absolute Hall sensor for precise positioning and travel control;
6. High-contrast OLED display with full Chinese dialogue menus;
7. Phase-sequence adaptive — free setting of rotation direction, automatic power-phase correction;
8. Loss-of-phase protection for power and output;
9. Infrared remote control for commissioning, operation, and parameter browsing in confined locations;
10. Free configuration of up to 6 contact signals, each freely assignable;
11. Powerful fault self-diagnostics and operating-data logging.
| Item | Value |
|---|---|
| Ambient temperature | -20℃~+70℃ |
| Ambient humidity | ≤95% (at +25℃) |
| Duty | On/off S2-10 min; modulating S5-10%, 630 starts/hour |
| Protection class | IP67 |
| Explosion-proof marking | Ex dⅡBT4 |
| Basic error | ≤±1.0% |
| Hysteresis | ≤1.0% |
| Torque repeatability | ≤±10% |
| Position repeatability | ≤±1° |
| Power supply | Three-phase 380 V AC 50 Hz |
| Connector | 23-core |
For selection and quotation of the 2SDQ series, feel free to contact us. (Compiled from public industry sources.)
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