Sullair Temperature Control Valve 02250105-553 for Screw Air Compressors

A Temperature Control Valve (TCV), also known as a Thermostatic Mixing Valve (TMV) in certain applications, is an automatic valve that modulates the flow of heating or cooling media (typically steam, water, or thermal oil) to maintain a consistent output temperature of a process fluid. It responds to changes in the sensed temperature by adjusting the mixing ratio of hot and cold streams or the flow rate of a single stream, ensuring precise thermal management without manual intervention.

• Precise Temperature Regulation: Maintains tight temperature control (±1°F/±0.5°C is common), which is critical for process consistency, product quality, and reaction stability in sensitive applications.
• Full Automation & Self-Operation: Many models use a self-contained thermal actuator filled with a wax or liquid element that expands/contracts with temperature changes to directly adjust the valve, requiring no external power. Others use pneumatic or electric actuators for integration into complex control loops.
• Energy Efficiency: Precisely meters the exact amount of heating or cooling media needed, eliminating waste and significantly reducing energy consumption compared to manual control or on/off systems.
• Process Safety & Protection: Prevents overheating or undercooling that could damage sensitive equipment, spoil product, or create safety hazards. Many include fail-safe features (e.g., fail-close on loss of power).
• Robust Construction for Demanding Services: Built from materials like stainless steel, brass, and cast iron with trim options (e.g., PTFE, EPDM seals) to handle high pressures, temperatures, and corrosive/erosive fluids.
• Flexible Configuration: Available in 2-way (modulate flow of a single stream) or 3-way (mix or divert two streams) designs to suit different system architectures (mixing vs. diverting applications).
• Hygienic & Sanitary Options: Available with polished finishes, CIP/SIP capabilities, and 3A certification for food, beverage, pharmaceutical, and bioprocessing applications.

1. Sensing: A temperature sensor (internal to the actuator or an external capillary bulb and bulb) continuously monitors the temperature of the process fluid.
2. Comparison: The sensed temperature is compared to the desired set point, which is manually adjusted on the actuator or received from a controller.
3. Actuation:
   • Self-Actuated: The thermal material inside the actuator expands or contracts, mechanically moving the valve stem to open or close the port.
   • Pneumatic/Electric: A transmitter sends a signal to a controller (PLC), which then commands a pneumatic or electric actuator to adjust the valve position.
4. Modulation: The valve modulates, changing the flow rate of the heating/cooling media to correct the temperature deviation and bring the process back to set point.

TCVs are essential in any industry where precise temperature is critical:

• HVAC Systems: Controlling water temperature for building heating, cooling, and domestic hot water systems to ensure comfort and prevent scalding.
• Process Industries: Regulating reactor temperatures, maintaining batch consistency, and controlling heat exchanger output in chemical, pharmaceutical, and food processing plants.
• Plastics & Rubber: Precise mold temperature control in injection molding and extrusion processes.
• Energy & Power Plants: Jacket water cooling, lube oil cooling, and fuel temperature regulation.
• Metal Finishing & Plating: Maintaining bath temperatures for consistent quality.
• Brewing & Distilling: Precise control during mashing, fermentation, and distillation stages.
• Pasteurization Units: Ensuring exact temperatures are met for safety and compliance.

• Application-Specific Engineering: We help you select the right valve type, size, actuator, and material for your specific temperature range, pressure, flow rate, and fluid properties.
• Proven Accuracy & Reliability: Engineered for stable control and long service life, reducing process variability and maintenance needs.
• Hysteresis & Response Tuning: Our valves are designed with minimal hysteresis (lag) and tuned for optimal response to process upsets.
• Comprehensive Support: From system design and selection to installation support and spare parts, we provide end-to-end expertise.
• Energy Savings Focus: By providing precise control, our valves directly contribute to lower utility bills and a reduced carbon footprint, offering a rapid return on investment.