Honeywell Thermal Solutions FSG V4943B1019 Diaphragm Gas Valve

Diaphragm Gas Valve from Honeywell Thermal Solutions, model FSG V4943B1019, is a robust 1-inch valve designed for atmospheric boilers, commercial water/makeup air, and rooftop heaters. This 1-Stage Slow Opening, straight-through, non-offset, solenoid-operated valve features threaded x threaded end connections and a durable die-cast aluminum body. Built for demanding environments, it operates from -40 to 150°F with a 1/2 psi pressure rating. Powered by 120 VAC at 60 Hz, it draws 0.055 A (6.6 VA) and delivers precise control with a 3–25 second open and 2 second close timing. The valve is designed for upright (horizontal) mounting and uses natural gas, making it a reliable choice for commercial HVAC and combustion applications.

• Nominal size: 1 inch
• End connections: Threaded x Threaded
• Mounting: Upright (Horizontal)
• Voltage / Power: 120 VAC, 60 Hz; 6.6 VA
• Operating timing: Open 3–25 seconds; Close 2 seconds
• Temperature & Pressure: -40 to 150°F; 1/2 psi
• Fuel & Applications: Natural gas; Atmospheric boiler, rooftop heater, duct furnace
• Electrical connections: 1/4" spade terminal, (2) 30" lead wires
• Standards: UL, CSA

Engineered for dependable performance in commercial settings, this diaphragm gas valve combines precise control with durable construction to support safe and efficient fuel regulation.