Maxon 400CMA11BA11BB21A0 Gas Valve

The Maxon 400CMA11BA11BB21A0 is a heavy-duty electro-mechanical gas shut-off valve built for mission-critical industrial fuel trains. Featuring a 4" ANSI flanged connection and a robust cast iron body, this unit is engineered for high-capacity flow control with a 510 Cv rating. As a two-way normally closed gas valve, it utilizes a powerful internal spring to provide instantaneous, fail-safe closure in less than one second upon loss of power, meeting the stringent requirements of SIL 3 capable safety systems.

This 400 series valve is configured with Internal Trim Package 1 and Buna-N O-rings, making it a reliable standard for natural gas and propane service. The 115Vac 60Hz motorized actuator features an auto-reset function and 6-second timing, ensuring consistent operation in demanding environments. For precise system feedback, the VOS1/VCS1 switch options provide proof-of-closure and proof-of-open monitoring, while the NEMA 4 enclosure protects internal components against water and dust ingress.

Key Technical Benefits:

• Fail-Safe Performance: Powerful closing spring ensures positive shut-off in under one second for enhanced site safety.
• Superior Flow Efficiency: The 4-inch CP port design provides a high 510 Cv flow capacity with minimal pressure drop.
• Operational Monitoring: Integrated SPDT VOS1/VCS1 position switches allow for seamless integration with flame safeguard and BMS controllers.
• Rugged Construction: Cast iron body and Buna-N seals are rated for ambient temperatures ranging from -20°F to 140°F.
• Industry Certified: Fully assessed to IEC 61508 standards and carries FM, CSA, UL, and CE approvals for global compliance.

Common Questions:

What is the maximum operating pressure for this valve?
The Maxon 400CMA series typically carries a Maximum Operating Pressure Differential (MOPD) of 40 PSIG, making it suitable for high-pressure industrial burners.

Can the actuator be rotated for tight piping clearances?
Yes, the top assembly is field-rotatable in 90-degree increments to accommodate specific orientation requirements in complex gas trains.

Is this valve compatible with corrosive gases?
This specific model uses Trim Package 1 and Buna-N seals, which are intended for general-purpose clean fuels like natural gas. For corrosive or specialized gas service, alternative trim packages should be verified.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.