Maxitrol R400-3/8 Gas Pressure Regulator NPT BTU - 3/8 300 000

The Maxitrol R400-3/8 is a compact gas appliance pressure regulator designed for both main burner and pilot load applications. This regulator features a double diaphragm balanced valve design that maintains steady outlet pressure control even with widely varying inlet pressures, making it ideal for demanding gas system applications.

Key Features:

• 3/8" NPT female threaded inlet and outlet connections
• 300,000 BTU capacity rating
• Double diaphragm balanced valve design for superior pressure control
• Aluminum housing construction for durability and corrosion resistance
• 3-6" water column (WC) outlet pressure range with standard CSA spring
• Maximum inlet pressure: 1/2 PSI (CSA certified), 1 PSI (Maxitrol tested)
• Compact design: approximately 2" width x 3.3" height
• Operating temperature range: -40°F to 205°F

Applications:

• Infrared heaters and radiant heating systems
• Pilot lines on large industrial heaters and boilers
• Main burner control for gas appliances
• Commercial and industrial heating equipment

This regulator is suitable for use with natural gas, manufactured gas, mixed gases, liquefied petroleum gases (LPG), and LP gas-air mixtures. The high-quality molded balancing diaphragm eliminates inlet pressure effects on the valve, ensuring consistent performance. ANSI Z21.18/CSA 6.3 certified for gas appliance pressure regulators. Suitable for multi-positional mounting. Professional installation by a licensed gas fitter is required.