Belimo NVK24A-MOD - actuator for globe valves with fail-safe function

Belimo NVK24A-MOD – actuator for globe valves

Communication actuator for 2-way and 3-way globe valves. In the event of a power failure, it uses stored electrical energy to move the valve to the selected fail-safe position.

Key features and specifications

• Actuating force: 1000 N; stroke: 20 mm.
• Nominal voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Communication: BACnet MS/TP, Modbus RTU, MP-Bus; modulating, communicative and hybrid control.
• Operating range Y: 2...10 V; adjustable operating range Y: 0.5...10 V; feedback signal U: 2...10 V.
• Motor running time: 150 s / 20 mm, adjustable to 90...150 s; running time to the fail-safe position: 35 s / 20 mm.
• Fail-safe position adjustable from 0...100% of the stroke in 10% increments using the POP rotary switch; factory power-failure bridging time (PF): 2 s, adjustable from 0...10 s.
• Connection for a passive, active or switching-contact sensor, with its signal transmittable via the bus.
• Manual positioning by push-button; stroke range adaptation started manually or automatically at first power-up.
• Power consumption during operation: 2.5 W; at rest: 1.5 W; sizing power: 6 VA.
• Power and control connection: 1 m cable, 6x 0.75 mm²; degree of protection IEC/EN IP54.