G250B-N BELIMO | Alldatasheet
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Technical content
Fluid chilled or hot water, up to 60% glycol, steam Flow characteristic modified equal percentage Controllable flow range stem up - open A – AB Valve Size [mm] 2” [50] Pipe connection NPT female ends Housing Bronze Stem stainless steel Stem seal EPDM O-ring Seat Bronze Valve plug brass Body Pressure Rating ANSI Class 250, up to 400 psi below 150°F ANSI Class 250 Maximum Inlet Pressure (Steam) 35 psi [241 kPa] Max Differential Pressure (Steam) 20 psi [103 kPa] Rangeability Sv 100:1 Cv 40 Weight 7.9 lb [3.6 kg] Leakage rate ANSI Class VI Servicing repack kits available Flow/Mounting Details Application This valve is typically used in air handling units on heating or cooling coils, and fan coil unit heating or cooling coils. Some other common applications include unit ventilators, VAV box re-heat coils and bypass loops. This valve is suitable for use in hydronic systems with variable flow. Bronze and stainless steel trim valves can be used for steam applications, depending on actuator and close-off combinations. Suitable Actuators Non-Spring Spring Electronic fail-safe G250B-N LVB(X) NF LVKB(X) Dimensions (Inches [mm]) E F B A C D LV A B C D E F Safety Notes WARNING: This product can expose you to lead which is known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov Piping The valves should be mounted in a weather-protected area in a location that is within the ambient limits of the actuator. Allow sufficient room for valve with actuator and for service. The G2 and G3 preferred mounting position of the valve is with the valve stem vertical above the valve body, for maximum life. However, the assemblies can be mounted with the valve stem vertical or horizontal in relation to the pipe. The actuators should never be mounted underneath the valve, as condensation can build up and result in a failure of the actuators. G250B-N Technical Data Sheet 800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 04/03/2020 - Subject to change. © Belimo Aircontrols (USA), Inc.
Dimensions (Inches [mm]) F E B A C D LVK A B C D E F Dimensions (Inches [mm]) F E B A C D NF A B C D E F G250B-N Technical Data Sheet 800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 04/03/2020 - Subject to change. © Belimo Aircontrols (USA), Inc.
Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10% Power consumption in operation 1 W Power consumption in rest position 0.5 W Transformer sizing 1 VA (class 2 power source) Electrical Connection 18 GA plenum cable, 3 ft [1 m], with 1/2” conduit connector, degree of protection NEMA 2 / IP54 Overload Protection electronic throughout full stroke Electrical Protection actuators are double insulated Input Impedance 100 kΩ (0.1 mA), 500 Ω, 1000 Ω (on/off) Position Feedback No Feedback Stroke 0.75” [19 mm] Actuating force motor 115 lbf [500 N] Direction of motion motor selectable with switch 0/1 Position indication Mechanically, with pointer Manual override 4 mm hex crank (shipped w/actuator) Running Time (Motor) default 90 s, variable 90 or 150 s Ambient humidity max. 95% r.H., non-condensing Degree of Protection IP54, NEMA 2, UL Enclosure Type 2 Housing material Die cast aluminium and plastic casing Agency Listing cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC and 2006/95/EC Noise level, motor 55 dB(A) Servicing maintenance-free Quality Standard ISO 9001 Weight 2.43 lb [1.1 kg] † Use flexible metal conduit. Push the listed conduit fitting device over the actuator’s cable to butt against the enclosure. Screw in conduit connector. Jacket the actuators input wiring with listed flexible conduit. Properly terminate the conduit in a suitable junction box. Rated impulse Voltage 800V. Type of action 1. Control pollution degree 3. †Rated Impulse Voltage 800V, Type of action 1.AA, Control Pollution Degree 3 LVB24-3 Technical Data Sheet On/Off, Floating Point, Non-Spring Return, Linear, 24 V 800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 12/20/2019 - Subject to change. © Belimo Aircontrols (USA), Inc.
Actuators may be connected in parallel. Power consumption and input impedance must be observed. Actuators may also be powered by 24 VDC. Actuators with plenum cable do not have numbers; use color codes instead. Meets cULus requirements without the need of an electrical ground connection. ! WARNING! LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
24 VAC Transformer
Blk (1) - Common Red (2) + Wht (3) + Line Volts 2 3 18 On/Off Blk (1) - Common Red (2) + Wht (3) + Line Volts
24 VAC Transformer 2 3 18
24 VAC Transformer (AC only)
Com Blk (1) - Common Red (2) + Hot Wht (3) Y1 Input 2 18 Triac Source Com Line Volts Hot Controller Blk (1) - Common Red (2) + Hot Wht (3) Y1 Input 2 18 Triac Sink LVB24-3 Technical Data Sheet On/Off, Floating Point, Non-Spring Return, Linear, 24 V 800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN Date created, 12/20/2019 - Subject to change. © Belimo Aircontrols (USA), Inc.