Maxon 250SMA11AA11BB21A0 Gas Valve 2.5" 115V with VCS/VOS Switches

The Maxon 250SMA11AA11BB21A0 is a 2-1/2 inch ANSI threaded gas valve designed for industrial and commercial heating applications. This electrically actuated valve shuts off gas lines in less than one second, providing reliable safety control for boilers, furnaces, ovens, and other gas-fired equipment.

Key Specifications:

• Flow Coefficient (Cv): 127 SCFH Natural Gas
• Operating Pressure Differential: 40 PSIG Max
• 115 VAC, 60 Hz Voltage
• 6 Second Motor Timing
• 2 Way Normally Closed, Auto-reset
• NEMA 4 Enclosure

Construction Features:

• Cast Iron Body
• Iron Disc, PEEK Follower Ring
• Buna-N O-Rings and Bumper
• NPT Threaded Body Connection
• Metal-to-metal seating for long-lasting operation

VCS/VOS Position Switches:

This valve includes VCS (Valve Closed Switch) and VOS (Valve Open Switch) for proof-of-closure and proof-of-open position indication. VCS is actuated at the end of the closing stroke, while VOS is actuated at the end of the opening stroke, allowing integration with burner management systems and control panels for valve position monitoring.

This valve meets Fluid Control Institute (FCI) 70-2 control valve standard for Class VI seat leakage and is suitable for use with natural gas and other fuel gases in industrial heating systems.