Robertshaw 4200-026 Gas Thermostat

The Robertshaw 4200-026 is a heavy-duty, high-capacity commercial gas thermostat engineered for precise thermal regulation in demanding culinary environments. Designed as part of the versatile Uni-Kit series, this FDTO gas thermostat features a 3/8" pipe inlet and outlet with a 4-way mounting configuration, providing the field flexibility essential for fast-paced service calls. This model operates within a 200°F to 550°F temperature range, making it the industry standard for deck ovens, convection units, and high-output ranges. The 54-inch capillary and nickel-plated sensing bulb ensure responsive modulating snap-acting bypass control, maintaining consistent heat loads without the fluctuations common in inferior pneumatic or hydraulic controls. For the veteran technician, the accessible, slotted pilot and bypass keys allow for immediate front-facing calibration, streamlining the adjustment process during oven thermostat replacement or routine burner maintenance. This Robertshaw 4200 series valve is built with heat-resistant materials to withstand the high-ambient conditions typical of commercial line equipment.

• Universal Compatibility: The 4-way mounting position and Uni-Kit design facilitate seamless integration across multiple commercial cooking equipment brands.
• Precision Modulation: Combines modulating fuel flow with a snap-acting bypass to maintain tight temperature tolerances and prevent flame-out at low settings.
• Rugged Reliability: Constructed with heavy-duty internal components and a nickel-plated bulb for long-term resistance to corrosion and thermal stress.
• Streamlined Service: Front-accessible pilot and bypass adjustments allow for "on-the-fly" tuning without disassembling the manifold.

Is the Robertshaw 4200-026 compatible with my existing dial?
This unit is designed to work with standard 4200 series dials; however, because it is a professional-grade component, verifying the "off" indexing and rotation direction against your specific manifold layout is recommended during installation.

What causes a bypass flame to extinguish on this model?
Frequent bypass failure typically stems from an improperly adjusted bypass key or a clogged pilot orifice. Use the slotted adjustment screw on the front of the gas valve to set the minimum stable flame required for your burner profile.

Can this thermostat be used for both natural gas and LP applications?
Yes, the 4200-026 is a non-regulated component that controls gas flow based on temperature; however, the gas pressure itself must be regulated upstream at the main combination valve or appliance regulator to match the fuel type.

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.