Robertshaw 700-508 Gas Valve

The Robertshaw 700-508 is a high-capacity millivolt gas valve engineered for demanding commercial and residential heating applications. This 700 series gas valve features a 1/2" x 1/2" NPT connection and is factory-set to a 3.5" WC manifold pressure, delivering a substantial capacity of 240,000 BTU. Designed for reliability in self-powered systems, it utilizes a thermopile-actuated pilot, eliminating the need for an external power source. The unit includes a manual gas cock with positions for off, pilot, and on, ensuring precise control during system maintenance. Technicians will appreciate the multi-position mounting capability, allowing for installation in any orientation except upside down. This valve is a direct HVAC replacement part for high-output boilers, wall heaters, and floor furnaces requiring a robust millivolt control valve with a proven track record for durability in the field.

• High BTU Capacity: Rated for up to 240,000 BTU to support large-scale heating equipment.
• Millivolt Operation: Operates on a 250mV to 750mV signal, ideal for remote locations or power-outage-prone areas.
• Flexible Installation: Compact design with multiple piping options and outlet ports for streamlined furnace gas valve replacement.
• Field Proven Reliability: Features a magnet head assembly and pilot filter for long-term performance in harsh environments.

What is the proper millivolt output required for this valve?
The Robertshaw 700-508 requires a minimum of 250mV from the thermopile for consistent operation, though 500mV to 750mV is recommended for optimal dropout prevention.

Can this valve be converted for use with Propane (LP)?
Yes, this Robertshaw 700 series unit is field-convertible using the appropriate gas valve conversion kit to switch from Natural Gas to Liquid Propane.

Are there specific mounting restrictions for the 700-508?
The valve can be mounted in any position—including vertical or horizontal—provided the control knob is not oriented downward.

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.