Belimo LR24A-SR elektrinė pavara
- Torque: 5 Nm
- Control signal: 0-10V or 2-10V modulating (proportional)
- Supply: 24V AC/DC
- Compatibility: Belimo characterized ball valves (CCV), 2/3/6-way valves
Where Belimo LR24A-SR is used
Standard rotary actuator for modulating HVAC valve control: fan-coil unit 2- and 3-way valves, DHW mixing groups, small heating/cooling branch control with characterised ball valves (Belimo CCV series). The 0-10V modulating signal enables proportional control — the valve position accurately tracks the controller command, not just an open/closed state. Long service life and Belimo's 5-year warranty — an industrial HVAC standard.
Technical specifications
| Parameter | Value |
|---|---|
| Code | LR24A-SR |
| Manufacturer | Belimo |
| Type | Rotary electric actuator, modulating (SR = Stellsignal Regelung) |
| Torque | 5 Nm |
| Rotation angle | 90° (for ball valves) |
| Stroke time | ~90-150 s (full 90° travel) |
| Control signal | 0-10V DC or 2-10V DC (selectable) |
| Position feedback | 0-10V (position indication to controller) |
| Supply | 24V AC ±20 % / 24V DC ±10 % |
| Power consumption | ~2.5 W (running), ~1 W (holding) |
| Protection class | IP54 |
| Ambient temperature | -30 → +50 °C |
| Noise level | ≤35 dB(A) |
| Manual override | Yes (push button with detent) |
Valve compatibility
LR24A-SR fits Belimo characterized ball valves (CCV) series: R2..-S2 (DN15-25 sizes), R2..-S4 (6-way), R3..-S2 (3-way), plus other Belimo ball control valves with compatible stem coupling. 5 Nm torque covers CCV valves up to DN25 with Kvs up to ~10 m³/h.
When to choose LR24A-SR
- Fan-coil units with 2- or 3-way CCV valves
- Small HVAC zone proportional valve control
- DHW mixing groups with ball valves
- When 0-10V modulating control is required, not 3-point
- When compact construction and quiet operation matter (occupied spaces)
B2B delivery and logistics via Amegata.lt
- 24-hour delivery across the EU (from our warehouse in Vilnius)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation on actuator selection
Official Belimo catalogue: belimo.com
Frequently asked questions
What is the difference between LR24A-SR and LR24A?
LR24A — 3-point (on/off, open/close) control — suits simple zone valve control. LR24A-SR — 0-10V or 2-10V modulating (proportional) control — suits PID regulation with accurate valve positioning. Torque, dimensions, supply are identical.
Is a separate feedback wire required?
The 0-10V feedback output is independent. It is optional for basic PID control but useful for: (1) BMS to log valve position, (2) diagnostics (detect mechanical binding when command and feedback diverge).
What about safety features?
LR24A-SR does not have a spring-return safety function — on power loss the valve stays in its last position. If the system requires an automatic safe position (e.g. safety close functions), choose LF24A-SR (with spring) or LR24A-SR + UPS.
Can it be used outdoors?
IP54 allows operation in dust and splashing water, but not under direct rain. For outdoor installations choose IP66 versions or fit the actuator in a protective enclosure. Ambient -30 °C — suits Lithuanian winter conditions, but electrical heating may be required for continuous -20 °C and below operation.
