Global Valves - BELIMO - #21

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ENG-93001-93621-08.04-1M • Printed in Switzerland • ZSD • Subject to technical modifications BC 21 Y DC 0...10 V U DC 2...10 V 1 2 3 4 5 Y2 -T ~ AC 24 V + DC 24 V ~ Y2 4 U 5 NVF24-MFT(-E) ! - + Y/Z T 1 2 3 Linear actuators for 2-way and 3-way globe valves DN 15...80 Modulating actuator (AC/DC 24 V) with emergency control function Control DC 0...10 V Applications Operation of globe valves. Mode of operation Modulating control is effected by means of a standard 0…10 V control signal. When the actuator is deenergized, the actuator spindle of the NVF.. type retracts and that of the NVF..E type extends. Product features Simple attachment to the neck of the valve by means of a clamping strap. Semiautomatic coupling of the valve stem to the actuator spindle. The actuator can be rotated through 360° on the neck of the valve. Functional reliability The actuator is short-circuit-proof and protected against polarity reversal. The stroke is adapted automatically and is also overload-proof. Manual operation Inserting a 5 mm hexagonal key and turning it clockwise causes the actuator spindle to extend from the actuator housing (pushing). Together with the action of the valve, this causes the flow of water to increase. The actuator spindle retains its position until the power supply is energized (the controller takes fiorst priority). Position indication The stroke of the valve is indicated mechanically on the bracket; the maximum stroke adjusts itself automatically. There is a twin-color LED status indicator under the cover of the housing. Safety note The linear actuator contains no components which can be replaced or repaired by the user. Note on delivery The UNV-002 bracket is included in the scope of delivery, providing the valve and the actuator are ordered together. Dimensions (incl. UNV-002) H Y Connection via safety isolating transformer Control signal from controller Measuring voltage U for position indication Wiring diagram 110 72 205 179 55 UNV-002 NVF24-MFT, NVF24-MFT-E linear actuators for globe valves Technical data NVF24-MFT NVF24-MFT-E Emergency control function Pulling Pushing Nominal voltage AC 24 V 50/60 Hz, DC 24 V Nominal voltage range AC 19.2…28.8 V, DC 21.6…28.8 V For wire sizing 10 VA Power consumption 5.5 W Connecting cable 1 m, 5 x 0.75 mm2 Control DC 0…10 V @ 100 kÙ Operating range DC 2…10 V for 0…100 % stroke Position feedback DC 2…10 V @ 0.5 mA Uni-rotation ±5 % Nominal stroke 20 mm Actuating force 800 N Manual operation Hexagonal key, self-resetting Running time 150 s Emergency actuating time < 1.5 s/mm Sound power level Max. 35 dB (A) or max. 50 dB (A) in emergency operation (spring) Position indication Mechanical 10…20 mm stroke Protection class III (safety extra-low voltage) Degree of protection IP54 Ambient temperature range Non-operating temperature Humidity test 0° …+ 50° C –40° …+ 80° C To EN 60730-1 EMC CE according to 89/336/EEC Software class A Mode of operation To EN 60730-1 Type 1 to EN 60730-1 Maintenance Maintenance-free Weight 1.8 kg incl. UNV-002 bracket (without valve)