An electric control valve is selected from the complete process duty rather than the valve size alone. The valve body, trim, actuator output, travel, control signal, feedback and power supply must work together to achieve stable control and the required shutoff performance.
1. Define the control duty
On-off control
Use for defined open/close operation. State operating time, cycle frequency, limit switches, manual override and required action on loss of supply.
Modulating control
Use when the valve must position proportionally for flow, pressure, level or temperature regulation. State the command signal and feedback requirement.
Valve mechanics
For linear valves confirm stroke and thrust; for rotary valves confirm break, running and seating torque plus the mounting interface.
2. Control signals and position feedback
| Selection item | Typical project input |
|---|---|
| Supply | Voltage, phase, frequency, enclosure rating and cable-entry requirement. |
| Modulating signal | 4–20 mA, 0–10 V, fieldbus or a project-specified control interface. |
| Feedback | Valve position feedback, open/close indication, torque alarm or local control status. |
| Safety action | Fail closed, fail open, fail in place or another project-approved action. |
3. Match the valve, trim and actuator
For regulating service, provide the required flow range, pressure drop, medium characteristics and acceptable leakage or shutoff class. These conditions influence valve type, trim and the output required from the electric actuator. Confirm duty cycle and starts per hour so heat dissipation and actuator life can be reviewed.
4. Existing or customer-specified actuator models
If the project references Rotork, AUMA, SAMSON or another actuator model, provide the nameplate, valve interface, required travel or torque, voltage, command signal and feedback details. Jinkon can assess integration compatibility before quotation.
Rotork, AUMA and SAMSON are third-party trademarks. Their mention describes customer-specified or replacement requirements only and does not indicate affiliation or authorized distribution.
5. RFQ checklist
- Valve type, size, connection, material and trim requirements
- Medium, pressure, temperature, flow and pressure-drop data
- Electric supply, control function, command signal and feedback
- Actuator stroke or torque, mounting interface and required fail action
- Environmental protection, certifications, quantity and delivery destination
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