Middleby 59450 Gas Valve, Modulating, No Spring

Description

The Middleby 59450 is a genuine OEM modulating gas valve, used in commercial ovens (especially conveyor/impingement ovens) to vary the gas flow as needed for precise temperature control. The “No Spring” designation means it doesn’t use a return spring inside the valve mechanism, which may affect how it responds to control signals (slower return, different fail-safe behavior, etc.). Using the correct modulating valve is essential for maintaining consistent heat profiles and safe operation in high-end foodservice equipment.

📌 Details / Technical Specifications

📋 Fits / Compatible Models

This valve is listed as fitting a number of Middleby / Middleby Marshall models. Some of the models include:

• PS520G

• PS536, PS536GS, PS536GS-RL

• PS540G

• PS555G, PS570G, PS570S

• PS670, PS770, PS870, PS970G

💡 Tech Tips / Advice

• Before replacing, check the control system: modulating valves usually respond to control signals (e.g. 0-10V, 4-20mA, or proprietary signals). Make sure your controller is compatible.

• Because this valve has no spring, in some cases a fail-safe or default behaviour may be different (e.g. when power or signal is lost). Make sure safety systems are verified after install.

• Check wiring voltage/current ratings to avoid overload on solenoid/coil. 24VDC at 0.40 A isn’t huge, but mismatched wiring or poor connections degrade performance.

• When installing, ensure sealing surfaces and gas connections are clean, use proper gas-safe fittings/gaskets. Test for leaks.

• Ensure part clears mounting and physical fit (space, screws, brackets) for the specific model — sometimes these valves have slightly different brackets or ports.

📌 Note

• Even though this is an OEM Middleby part, always confirm your oven’s model number & serial match one of the models listed. Valves are safety-critical: wrong part may lead to poor performance or safety issues.

• Price may vary by supplier; I saw one listing around US$559.71 for this part.