SullairThermo Valve Repair Kit V-Cup 175°F Replacement – 02250105-553

Sullair 02250105-553 – Thermo Valve Repair Kit V-Cup 175°F

The Sullair 02250105-553 Thermo Valve Repair Kit is a service kit used to restore the operating performance of the thermal/thermostatic valve in Sullair rotary screw air compressors. The valve regulates the flow of compressor oil between the oil cooler and the compressor air end according to oil temperature.

Working Process:

During compressor start-up, the compressor oil is relatively cold. The thermal valve initially keeps most of the oil away from the oil cooler by directing it through the bypass path. This allows the lubricant to warm up quickly and helps the compressor reach its normal operating temperature.

As the compressor operates, the oil absorbs heat generated during air compression. The temperature-sensitive element inside the thermal valve responds as the oil temperature increases.

The 02250105-553 kit is specified for a 175°F thermal valve application. As the oil approaches the valve’s calibrated operating temperature, the thermostatic element moves and progressively changes the oil-flow path. Increasing amounts of oil are directed through the oil cooler.

The oil cooler removes heat from the lubricant before the oil returns to the compressor air end. The cooled oil then performs its essential functions of lubrication, cooling, sealing, and heat removal during compression.

The thermal valve continuously adjusts the balance between bypass flow and cooler flow according to oil temperature. This automatic regulation helps maintain the compressor oil within its intended operating range.

Maintaining the correct oil temperature is important for reliable compressor operation. If the oil temperature becomes excessively high, the lubricant can degrade and the compressor may experience overheating and increased component wear. If the oil remains excessively cold, moisture condensation and unsuitable lubrication conditions may occur.

The 02250105-553 repair kit is used when the internal thermal-valve element or sealing components become worn, damaged, contaminated, or unable to respond correctly to temperature changes. References identify the kit as “Kit, Thermo Valve Repr V-Cup 175F” and also associate it with thermal valve 049542 rated at 175°F.

During maintenance, the compressor must be stopped, isolated, depressurized, and allowed to cool before the thermal valve is opened. The old thermal element, V-cup, seals, and other service components should be removed according to the applicable Sullair maintenance procedure.

The valve housing and oil passages should be inspected for contamination, scoring, corrosion, or other damage. The replacement components from the 02250105-553 kit should then be installed in the correct orientation. Correct installation is essential for proper temperature response and oil-flow control.

After servicing, the compressor should be started and allowed to reach normal operating temperature. Oil temperature should be monitored to confirm that the thermal valve changes from bypass operation to cooler operation correctly.

A defective thermal valve can cause excessive oil temperature, slow warm-up, poor cooling, lubricant degradation, increased oil consumption, or compressor overheating. A valve stuck in the bypass position can prevent adequate oil cooling, while a valve stuck open toward the cooler can cause excessively low oil temperature during certain operating conditions.

Correct maintenance using the Sullair 02250105-553 Thermo Valve Repair Kit helps restore automatic oil-temperature regulation, maintain proper lubrication and cooling, protect the compressor air end, and improve overall compressor reliability.

Part Number: 02250105-553
Numeric Format: 02250105553
Brand: Sullair
Part Description: Kit, Thermo Valve Repair V-Cup 175°F
Component Type: Thermal / thermostatic valve repair kit
Related Thermal Valve: 049542
Temperature Rating: 175°F / approximately 79°C
Application: Sullair stationary rotary screw air compressors
Primary Function: Regulates compressor oil temperature
Operating Function: Controls oil flow through the cooler or bypass circuit according to temperature
Main Benefits: Faster warm-up, controlled oil temperature, proper lubrication, effective cooling, reduced thermal stress, and reliable compressor operation..

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