02250105-553 Thermal Valve Thermostat Valve Element for Screw Air Compressor

Product Introduction

The 02250105-553 is a thermal valve service kit used to refresh the temperature-control function in rotary screw air compressors. It targets the thermostatic valve that splits lubricating oil between the bypass path and the cooler, so the machine warms up fast and avoids overheating under load. Instead of changing the whole valve body, this kit restores the temperature-sensitive element and sealing parts—making it a smart overhaul item for maintenance crews.

Detailed Product Description

Why This Kit Exists

Thermal valves work by sensing oil temperature and shifting flow accordingly. Cold oil bypasses the cooler; hot oil gets cooled before returning to the airend. Over time the element loses its calibrated stroke, seals harden, and the compressor starts running too cold or too hot. The 02250105-553 kit puts the critical internals back to spec without scrapping the complete valve housing.

Key Benefits

• Temperature Accuracy: Restores proper opening point so oil routing follows real operating temperature.
• Cold-Start Care: Keeps lubricant warm enough to avoid condensation, milky oil, and sludge.
• Overheat Protection: Lets hot oil reach the cooler before the airend suffers thermal stress.
• Kit Format: Often includes thermal element, seals, and gasket-type parts for one-stop service.
• Also Called: thermal valve repair kit, thermostat valve element kit, temperature control valve service kit, thermo valve rebuild kit.

Common Applications

• Rotary screw air compressors with separator-tank thermal valve assemblies
• Industrial plants, workshops, and compressed air stations
• Compressor preventive maintenance and temperature-control overhaul
• Spare-parts inventory for service technicians

When To Use It

Use this kit when the compressor shows high discharge temperature, long warm-up time, unstable oil temperature, frequent high-temp trips, or oil condition problems linked to poor thermal control. A stuck element may not look broken from outside, but temperature response is already off.

Installation & Order Note

• Let the machine cool and relieve pressure before opening the oil circuit.
• Match set temperature, element length, stem diameter, and seal/gasket pattern to the removed part.
• Some references list 02250105-553 as a thermal valve repair kit for a 175°F / 88°C thermal valve; always confirm by old part photo or machine data.
• Refill with correct compressor lubricant and check warm-up and cooling behavior after restart.