Belimo Actuator 0-10V Fail-Safe 24VAC/DC 40Nm IP54 150s F05 GRK24A-SZ-5

This Belimo electrical actuator is designed for controlling quarter turn valves. The actuator delivers a torque of 40 Nm and can open/close the valve in 150 seconds. This actuator requires a supply voltage of 24 V AC/DC and has a visual positioning indicator to clearly see the valve position. The actuator utilizes a 0-10 V control type and provides position feedback, enabling precise control of its movements and accurate monitoring of its position within the specified voltage range. The actuator simultaneously positions the valve as the integrated capacitors are charged. In case of a power supply interruption, the valve automatically returns to the open/close position using stored electrical energy. The actuator mounts to a quarter turn valve with an ISO 5211 F05 flanges. The actuator has a durable plastic housing and has an IP54 protection rating. This actuator can operate within ambient temperatures between -30 and 50 °C (-22 and 122 °F). The actuator comes with a 1-meter power cable.

The actuator is equipped with overload protection, the actuator doesn't need limit switches and will stop automatically when the end stop is reached. Manual override is possible using a push-button, which disengages the gear train as long as the button is pressed or remains locked. The actuator can be directly mounted on the rotary or butterfly valve with a mounting flange. The mounting orientation relative to the valve can be selected in 90° increments. The actuator moves the valve to the desired operating position simultaneously as the integrated capacitors charge. If the power supply is interrupted, the valve shifts to the chosen fail-safe position using the stored electrical energy. The rotation angle can be adjusted with mechanical end stops. The capacitor actuators require a pre-charging period to bring the capacitors to a usable voltage level. This ensures that, in case of a power failure, the actuator can move from its current position into the fail-safe position at any time. The rotary knob fail-safe position allows for adjusting the preferred fail-safe position. In case of a power outage, the actuator moves to the selected fail-safe position, considering the factory-set bridging time of 2 seconds. Post-factory delivery, the actuator is fully discharged and requires about 20 seconds of pre-charging before initial setup to attain the necessary voltage level in the capacitors.

Pros:

• The ISO 5211 F05 mounting flange fits many quarter-turn valves
• The actuator is equipped with a fail-safe feature
• Modulating actuator with a control signal of 0-10 V
• Manual override
• The actuator is overload protected
• Visual position indicator

Cons:

• The time to open/close of 150 s is slow for some applications