Belimo NVK24A-SZ-TPC - linear actuator for globe valves

Belimo NVK24A-SZ-TPC

Analog linear actuator for 2- and 3-way globe valves, designed for stationary heating, ventilation and air-conditioning systems. In the event of a power supply failure, it uses energy stored in the capacitors to move the valve to its safety position.

Key features and specifications

• Thrust: 1000 N; stroke: 20 mm.
• Rated voltage: AC/DC 24 V; operating supply range: AC 19.2...28.8 V / DC 21.6...28.8 V.
• Y operating range: 0.5...10 V; U feedback signal: 0.5...10 V.
• Safety position (POP) set by a dial within a range of 0...100%, in 10% increments; power reserve time (PF): 2 s.
• Motor running time: 150 s / 20 mm; safety function running time: 35 s / 20 mm.
• Power consumption during operation: 2.5 W; at rest: 1.5 W; rated power: 6 VA.
• Power / control connection: Terminals with 1 m cable, 4x 0.75 mm², 4 mm² terminal.
• Manual adjustment using a push-button; travel range adjustment manually or automatically after initial start-up.
• Enclosure protection rating: IP54; ambient temperature: 0...50°C.

The actuator is mounted directly on the globe valve using a shaped clamp. The capacitors of the supplied actuator are completely discharged and must be charged for approximately 20 s before start-up.