Robertshaw 700-426 Gas Valve

The Robertshaw 700-426 is a heavy-duty 24V gas valve designed for high-capacity heating applications requiring a slow opening gas valve characteristic. Engineered with a 3/4" NPT inlet and outlet, this Robertshaw 700 series valve is factory-set at 3.5" WC for natural gas, providing a controlled ignition sequence that reduces "booming" during startup. As a versatile combination gas valve, it functions as a redundant pilot safety, manual valve, and pressure regulator in a single compact housing. This unit is the primary replacement for Robertshaw 700-473 and is frequently utilized in commercial boilers, furnaces, and commercial cooking equipment. The 100,000 BTU capacity and multi-position mounting capability allow for flexible installation in tight mechanical closets. Technicians rely on the 700-426 gas valve for its reliable solenoid operation and precise gas flow modulation, ensuring consistent burner performance and system longevity in demanding environments.

Key Performance Benefits:

• Slow Opening Feature: Ensures a soft start by providing a gradual increase in gas flow to the burner, preventing pressure spikes and flame rollout.
• High Compatibility: Direct replacement for Robertshaw 700-473 and compatible with most 24V AC heating control systems.
• Versatile Mounting: Can be installed in any position except upside down, accommodating various manifold configurations.
• Technical Reliability: Features a 3/4" x 3/4" NPT connection with a 1/4" CCT pilot outlet, suitable for high-demand HVAC gas valve replacement projects.

Common Technical Questions:

What is the benefit of a slow opening gas valve?
A slow opening valve allows for a controlled ignition by releasing a small amount of gas initially, followed by the full flow. This prevents hard light-offs and reduces stress on the heat exchanger.

Can this valve be used with Liquid Propane (LP)?
While factory-set for natural gas at 3.5" WC, this valve can be converted for LP applications using the appropriate Robertshaw conversion kit for the 700 series.

Does this unit replace the 700-473?
Yes, the 700-426 is the direct functional replacement for the 700-473 model, sharing the same 3/4" pipe sizing and 24V electrical requirements.

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.