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Environmental & Combustion Controls
V4943A1045
Diaphragm Gas Valve, Normally Closed, 2 in. NPT pipe size, 1/2 max. psi

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Overview
V4943A/V8943A are on/off diaphram gas valve used on boilers, unit heaters, duct furnaces, makeup air and rooftop heaters.

Product Prices
Package Type Product Base Price($) Order Quantity
U
1 + $911.43
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Features

• Designed for replacement for V4843A/V8843A Gas Valves.
• Suitable for use on atmospheric boilers, commercial water heaters, and rooftop heaters.
• V8943A/V4943A models are solenoid-operated diaphragm valves for on/off flow control of natural or LP gas.
• Valve body of die-cast aluminum with a straight-through pattern.
• V4943 are used with line voltage, on/off controllers; V8943A are used with 24 Vac thermostats or controllers.
• Valve closes on power failure; recommended for final shutoff service.
Product Specifications  Back To Top
Description Diaphragm Gas Valve, Normally Closed, 2 in. NPT pipe size, 1/2 max. psi
Valve Type On-Off, Rapid Opening
Pipe Size (inch) 2 in.
Pipe Size (DN) DN50
Capacity (cfh) 3000 cfh
Pilot Tapping 1/8-27 NPT
Pressure Ratings (psi) 1/2 psi
Pressure Ratings (kPa) 3.4 kPa
Type of Gas Natural
Type of Gas LP
Valve Opening Time 6 sec max
Valve Closing Time 3 sec max
Bleed Tapping Internal Bleed
Power Consumption 6.6 VA
Current (max amps at rated Vac/Hz) 0.055 amps
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. 3371-03, 83 (Z21.21, Z21.78)
Comments (2) 30" leadwires

Literature and other Resources Download Back To Top
Product Data - (V4943B Regulating Diaphragm Gas Valves)
Product Data - (V4943A On/Off 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 V4944B,C,L,N with 3 leadwire electrical termination Wiring(LineArt)
Typical wiring diagram for V4944B,C,L,N with 3 leadwire electrical termination Wiring(LineArt - Web Quality Image)
Typical wiring diagram for V4943B or V4943N Wiring(LineArt)
Typical wiring diagram for V4943B or V4943N Wiring(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)
Typical wiring diagram for V8944B,C,L,N with 3 leadwire electrical termination Wiring(LineArt)
Typical wiring diagram for V8944B,C,L,N with 3 leadwire electrical termination Wiring(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)
V4943/44 and V8943/44 dimensions Dimension(LineArt)
V4943/44 and V8943/44 dimensions Dimension(LineArt - Web Quality Image)
On/Off Diaphragm Gas Valves Dimensions Dimension(LineArt)
On/Off Diaphragm Gas Valves Dimensions Dimension(LineArt - Web Quality Image)
valve leak test Wiring(LineArt)
valve leak test Wiring(LineArt - Web Quality Image)
On/Off Diaphragm Gas Valve Dimension(LineArt)
On/Off Diaphragm Gas Valve Dimension(LineArt - Web Quality Image)
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