V4943B, N/8943B, C, N are Single-stage Pressure Regulating Valves.
These valves are used on boilers, unit heaters, duct furnaces, makeup air and rooftop heaters.
V4943A/V8943A are on/off diaphragm gas valve used on boilers, unit heaters, duct furnaces, makeup air and rooftop heaters.

• 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
• Type of Fuel: Natural; LP
• Bleed Tapping: Internal Bleed
• Pilot Tapping: 1/8-27 NPT
• Body Pattern: Straight-through, non-offset
• Opening Characteristics: Rapid Opening On-Off
• Valve Opening Time: 6 sec max
• Valve Closing Time: 3 sec max
• Mounting: Upright (horizontal)
• Materials: Body – Aluminum
• Frequency: 60 Hz
• Electrical Connections: 1/4 in. (6 mm) spade terminals (quick connects). 30 in. (762 mm) leadwires and cover for electrical conduit connection provided
• Operating Temperature Range: -40°F to +150°F (-40°C to +66°C)
• Approvals, Underwriters Laboratories Inc.: File No. MH1639, Guide No. YIOZ (60 Hz only)
• Approvals, CSA: Certificate No. 158158-1042930, Guide No. 3371-03, 83 (Z21.21, Z21.78)
• Pressure Ratings (psi): 1/2 psi
• Pressure Ratings (kPa): 3.4 kPa
• Comments: (2) 30" leadwires
• Current Ratings: 0.055 max amps at rated Vac/Hz