Kailing KLST series electric actuators automate rotary valves such as ball valves and butterfly valves. Use this page to confirm torque, action type, voltage, valve DN range, control signal and environment before RFQ.
KLST - 02 - A - AC24V - KLST: normal electric actuator
- KLSTZ: explosion-proof type
- KLSTA: waterproof type
- 02
- 05
- 10
- 20
- 40
- 60
- 100
- 200
- 400
- B: standard on/off
- A: intelligent modulating
- S: non-contact
- K: with position transmitter
- R: opening signal type
- DC24V
- AC24V
- AC110V
- AC220V
- AC380V
Choose by torque and control type
First confirm the valve working torque, then select the KLST actuator torque and control structure. Use B for standard on/off and A for intelligent modulating control when the application needs proportional input.
Voltage and signal confirmation
The catalog lists DC24V, AC24V, AC110V, AC220V and AC380V options. Confirm power supply, control signal and feedback requirements before quotation.
Selection margin
The catalog recommends using 60%-80% of actuator rated output torque as the valve working torque reference because valve type, manufacturer and environment change actual torque.
RFQ confirmation points
Confirm valve type, DN size, working torque, open/close or modulating function, power supply, signal or feedback type, environment, protection requirement and quantity.
| Parameter | Value |
|---|---|
| Actuator variants | KLST normal, KLSTZ explosion-proof, KLSTA waterproof |
| Structure options | B standard on/off, A intelligent modulating, S non-contact, K position transmitter, R opening signal |
| Voltage options | DC24V, AC24V, AC110V, AC220V, AC380V |
| Torque range in selection table | 6N.m to 6000N.m by model |
| Action time range in selection table | 7s to 150s for 0-90 degrees by model |
| Selection principle | Choose actuator rated output torque so 60%-80% of rated torque covers the valve working torque |
KLST valve sizing and torque reference
| Model | Output torque | Action time 0-90 degrees | Power | Hard-seal butterfly | Soft-seal butterfly | Ball valve | Ventilation butterfly |
|---|---|---|---|---|---|---|---|
| KLST-02 | 6N.m | 7s | AC110/AC220 50/60Hz or DC24V | DN25 | Up to DN20 | ||
| KLST-05 | 15N.m / 30N.m / 50N.m | 10s / 20s / 30s | AC110V, AC220V, AC380V, 50/60Hz, DC24V | Up to DN65 | Up to DN40 | DN50-DN80 | |
| KLST-10 | 50N.m / 60N.m / 100N.m | 13s / 15s / 20s / 30s | AC110V, AC220V, AC380V, 50/60Hz, DC24V | DN40-DN65 | DN80-DN125 | DN40-DN50 | DN100-DN200 |
| KLST-20 | 80N.m / 100N.m / 150N.m / 200N.m | 9s / 15s / 20s / 30s / 60s | AC110V, AC220V, AC380V, 50/60Hz, DC24V | DN80-DN125 | DN150-DN200 | DN65-DN80 | DN250-DN300 |
| KLST-40/60 | 150N.m / 250N.m / 400N.m / 600N.m | 9s / 15s / 20s / 30s / 60s | AC110V, AC220V, AC380V, 50/60Hz, DC24V | DN150-DN200 | DN250 | DN100-DN125 | DN350-DN500 |
| KLST-100 | 800N.m / 1000N.m | 30s / 50s | Confirm by model | DN250 | DN300-DN350 | DN150-DN200 | DN600-DN800 |
| KLST-200 | 2000N.m | 100s | Confirm by model | DN300-DN400 | DN400-DN500 | DN250-DN300 | DN800-DN1000 |
| KLST-400 | 4000N.m | 100s | Confirm by model | DN400-DN500 | DN500-DN600 | DN300-DN400 | DN1000-DN1200 |
| KLST-600 | 6000N.m | 150s | Confirm by model | DN500-DN600 | DN800-DN600 as printed; confirm | DN400-DN500 | DN1400-DN1600 |
The catalog warns that actual valve torque differs by valve type, manufacturer and service environment. Final actuator sizing must be confirmed by working torque.
Frequently Asked Questions
- FAQ Which KLST structure should be selected for simple open/close control?
Use the B standard on/off structure when only open and close control is required. - FAQ When should buyers choose KLST-A?
KLST-A is the intelligent modulating type, used when the valve needs proportional control rather than simple on/off operation. - FAQ Can the model be selected from DN size alone?
No. DN ranges are references. Final selection should check actual valve torque, medium, pressure, service environment and safety margin.
Need a quotation?
Send the model, medium, pressure, port size, body material and quantity for review.