Description
The Belimo PRBUP-3-T is an electric butterfly valve actuator designed for on/off and floating point control of large-diameter valves in HVAC and industrial systems. It operates over a wide AC/DC voltage range and provides reliable non-spring return actuation with integrated auxiliary switching.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
HVAC Control Components |
| Part Number |
PRBUP-3-T |
| Subcategory |
Butterfly Valve Actuators |
| Actuator Type |
Electric, Non-Spring Return |
| Compatible Valve Size |
2 in to 24 in |
| Nominal Voltage |
AC 24–240 V / DC 24–125 V |
| Frequency |
50/60 Hz |
| Voltage Range |
AC 19.2–264 V / DC 19.2–137.5 V |
| Power Consumption (Operation) |
23 W |
| Power Consumption (Rest) |
7.5 W |
| Transformer Sizing |
23 VA @ 24 V / 55 VA @ 240 V |
| Control Type |
On/Off, Floating Point |
| Auxiliary Switches |
2 × SPDT |
| Switching Capacity |
1 mA–3 A, up to 250 VAC |
| Electrical Connection |
Terminal blocks with PE ground screw |
| Overload Protection |
Electronic, full rotation |
| Angle of Rotation |
90° |
| Running Time |
35 s / 90° |
| Manual Override |
7 mm hex crank (included) |
| Position Indication |
Integral mechanical pointer |
| Degree of Protection |
IP66/67 |
| Enclosure Rating |
NEMA 4X |
| Ambient Temperature |
−30…50°C |
| Ambient Humidity |
Up to 100% RH |
| Weight |
6.8 lb (3.1 kg) |
Information About PRBUP-3-T
The PRBUP-3-T is a Belimo butterfly valve actuator developed for demanding control applications involving large valves and harsh environments. It is designed to mount on butterfly valves ranging from 2 inches to 24 inches in diameter and supports both on/off and floating point control strategies. The actuator accepts a broad AC/DC voltage range, reducing the need for dedicated power supplies across different installations. Its sealed NEMA 4X enclosure and electronic overload protection support reliable long-term operation in mechanical rooms, rooftops, and industrial settings.
Key Features
- Wide power input range: Supports AC 24–240 V and DC 24–125 V to accommodate varied electrical infrastructures.
- Large butterfly valve compatibility: Designed for direct mounting on valves from 2 inches up to 24 inches in diameter.
- On/off and floating control modes: Enables flexible control strategies for HVAC and industrial automation systems.
- Integrated auxiliary switching: Two SPDT auxiliary switches provide position indication, interlocking, or signaling functions.
- Rugged environmental protection: IP66/67 and NEMA 4X ratings allow use in washdown, outdoor, and high-humidity environments.
- Electronic overload protection: Protects the actuator throughout the full 90-degree rotation range to enhance durability.
- Manual override capability: Supplied with a hex crank to allow manual positioning during commissioning or maintenance.
The PRBUP-3-T delivers the reliability and precision required for dependable actuation of large butterfly valves in HVAC and industrial control applications.
