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Environmental & Combustion Controls
V4944B1042
Diaphragm Gas Valve, two stage pressure regulating, Slow Opening, 2 in. NPT pipe size, 1/2 max. psi

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Overview
V4944B,L,N/8944B,C,L,N are Two-stage Pressure Regulating Gas Valve. These valves are used on boilers, unit heaters, duct furnaces, makeup air and rooftop heaters.

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Features

• Designed for replacement for V4844/V8844 Gas Valves.
• Suitable for use on atmospheric boilers, commercial water heaters, and rooftop heaters.
• V4944/V8944B,C,L,N models are solenoid-operated diaphragm valves that combine the functions of safety shutoff and pressure regulation in a single unit.
• V4944/V8944B,N are for use with natural gas.
• V4944/V8944C,L are for use with LP gas.
• Valve body of die-cast aluminum with a straight-through pattern.
• V4944 are used with line voltage, dual-stage controllers; V8944 are used with 24 Vac dual-stage thermostats or controllers.
• Valve closes on power failure; recommended for final shutoff service.
Product Specifications  Back To Top
Description Diaphragm Gas Valve, two stage pressure regulating, Slow Opening, 2 in. NPT pipe size, 1/2 max. psi
Valve Type Two-Stage, Slow Opening
Pipe Size (inch) 2 in.
Pipe Size (DN) DN50
Capacity (cfh) 870 cfh to 3000 cfh
Pilot Tapping 1/8-27 NPT
Pressure Ratings (psi) 1/2 psi
Pressure Ratings (kPa) 3.4 kPa
Type of Gas Natural
Valve Opening Time 3 sec to 25 sec
Valve Closing Time 2 sec max
Regulator Setpoints; Adj. Range, Low Fire 0.8 in. wc to 2 in. wc
Regulator Setpoints; Adj. Range, High Fire 3 in. wc to 4.5 in. wc
Bleed Tapping Two 5/16-24 UNF
Power Consumption 9 VA
Current (max amps at rated Vac/Hz) 0.077 amps
Regulator Setpoints; Factory Setting, Low Fire 0.8 in. wc
Regulator Setpoints; Factory Setting, High Fire 3.5 in. wc
Mounting Upright (horizontal)
Materials (Body) Aluminum
Voltage 120 Vac
Frequency 60 Hz
Operating Temperature Range (F) -40 F to +150 F
Operating Temperature Range (C) -40 C to +66 C
Electrical Connections 1/4 in. (6 mm) spade terminals (quick connects). 30 in. (762 mm) leadwires and cover for electrical conduit connection provided.
Dimensions (in.) 7 3/8 in. high x 6 in. wide x 6 in. deep
Dimensions (mm) 187 mm high x 152 mm wide x 152 mm deep
Body Pattern Straight-through, non-offset
Approvals, Underwriters Laboratories Inc File No. MH1639, Guide No. YIOZ (60 Hz only)
Approvals, Canadian Standards Association Certificate No. 158158-1042930, Guide No. 3302-01, 81 (Z21.21, Z21.78)
Comments (3) 30" leadwires

Literature and other Resources Download Back To Top
Product Data - (V4944N1086 Regulating Diaphragm Gas Valve)
Product Data - (V4944B Regulating Diaphragm Gas Valves)
Diahpragm gas valve Dimension(LineArt)
Diahpragm gas valve Dimension(LineArt - Web Quality Image)
diahpragm gas valve Dimension(LineArt)
diahpragm gas valve Dimension(LineArt - Web Quality Image)
Typical wiring diagram for V8943B, V8943C, V8943N Wiring(LineArt)
Typical wiring diagram for V8943B, V8943C, V8943N Wiring(LineArt - Web Quality Image)
V4943/44 and V8943/44 dimensions Dimension(LineArt)
V4943/44 and V8943/44 dimensions Dimension(LineArt - Web Quality Image)
Capacity vs. pressure drop of natural gas curves for 1 in. valve Graph(LineArt)
Capacity vs. pressure drop of natural gas curves for 1 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of natural gas curves for 1-1/4 in. valve Dimension(LineArt)
Capacity vs. pressure drop of natural gas curves for 1-1/4 in. valve Dimension(LineArt - Web Quality Image)
Capacity vs. pressure drop of natural gas curves for 1-1/2 in. valve Graph(LineArt)
Capacity vs. pressure drop of natural gas curves for 1-1/2 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of natural gas curves for 2 in. valve Graph(LineArt)
Capacity vs. pressure drop of natural gas curves for 2 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of LP gas curves for 1 in. valve Graph(LineArt)
Capacity vs. pressure drop of LP gas curves for 1 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of LP gas curves for 1-1/4 in. valve Graph(LineArt)
Capacity vs. pressure drop of LP gas curves for 1-1/4 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of LP gas curves for 1-1/2 in. valve Graph(LineArt)
Capacity vs. pressure drop of LP gas curves for 1-1/2 in. valve Graph(LineArt - Web Quality Image)
Capacity vs. pressure drop of LP gas curves for 2 in. valve Graph(LineArt)
Capacity vs. pressure drop of LP gas curves for 2 in. valve Graph(LineArt - Web Quality Image)
valve leak test Wiring(LineArt)
valve leak test Wiring(LineArt - Web Quality Image)
valve Callouts(LineArt)
valve Callouts(LineArt - Web Quality Image)
Regulating Diaphragm Graph(LineArt)
Regulating Diaphragm Graph(LineArt - Web Quality Image)
Regulating Diaphragm Graph(LineArt)
Regulating Diaphragm Graph(LineArt - Web Quality Image)
Regulating Diaphragm Graph(LineArt)
Regulating Diaphragm Graph(LineArt - Web Quality Image)
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