Complete Guide to HVAC Chiller Spare Parts: Coils, Valves, Filters, and Maintenance Tools
Industrial Process ChillerSpare parts

Essential Chiller Parts: HP/LP Switches, HMI, PID & Valves

Posted on by admin

In the world of industrial cooling, chillers are mission-critical systems. For them to operate safely, efficiently, and with minimal downtime, using the right control and functional components is essential. At Reynold India, we offer a full range of chiller parts, including HP/LP pressure switches, HMI displays, PID controllers, PLC modules, solenoid valves, and more.

This guide will walk you through the key chiller components that ensure performance, safety, and smart automation in modern HVAC systems.

1. HP Switch 0–14 BAR for Chillers

High Pressure (HP) Switches are designed to protect the compressor from operating under excessive pressure.

  • Function: Automatically shuts off the compressor if discharge pressure exceeds safe levels.

  • Reynold Advantage: Reliable and calibrated HP switches rated for 0–14 BAR, ideal for heavy-duty industrial chillers.

2. LP Switch 0–16 BAR for Chillers

Low Pressure (LP) Switches monitor suction line pressure to prevent damage from low refrigerant or system leaks.

  • Importance: Prevents freezing and compressor short-cycling.

  • Specification: Our LP switches are rated at 0–16 BAR, offering accurate cut-in/cut-out settings.

3. Pressure Switches KP-35 & KP-36 for Chillers

The KP Series (KP-35 & KP-36) from trusted global brands are used in both high- and low-pressure applications.

  • Use Cases: Refrigeration compressors, air-cooled and water-cooled chillers.

  • Features: Robust construction, easy installation, and customizable differential settings.

4. HMI Display for Chiller

Human Machine Interfaces (HMIs) provide real-time monitoring and control of chiller parameters.

  • Functions: Display temperature, pressure, alarms, and allow manual overrides.

  • Available Models: Multiple options including touchscreen HMI displays with intuitive layouts.

HMI Display for Chiller in India

Reynold India supplies HMI displays optimized for Indian industrial conditions, including dust resistance, high brightness, and local support.

5. PID Controller for Chiller

PID (Proportional-Integral-Derivative) Controllers regulate chiller output based on sensor input for optimal control.

  • Use: Ensures precise temperature control by adjusting compressor or valve behavior.

  • Benefits: Reduces energy consumption, avoids short cycling, and improves chiller stability.

6. PLC SR-30 for Chiller

Programmable Logic Controllers (PLC) are the backbone of automated chiller operation.

  • Model: SR-30 PLC, known for its compact design and flexible programming.

  • Functionality: Manages fan speed, compressor cycles, valve controls, and alarm systems.

7. MCS CT300-5 for Chiller

The MCS CT300-5 is a current transformer module used for monitoring motor and compressor loads.

  • Applications: Real-time load feedback to the PLC for motor protection and diagnostics.

  • Why it matters: Early fault detection and improved energy management.

8. Solenoid Valve for Chiller

Solenoid valves control the flow of refrigerant or water in the chiller circuit.

  • Uses: Hot gas bypass, suction line shutoff, or condenser water flow.

  • Features: Fast response, corrosion-resistant body, and high-pressure tolerance.

9. Filter Dryer for Chillers

A filter dryer removes moisture and contaminants from the refrigerant line.

  • Why it’s essential: Prevents acid formation, corrosion, and blockage in capillaries and valves.

  • Recommendation: Replace during major servicing or any time the refrigerant circuit is opened.

10. Expansion Valve for Chiller System

The expansion valve is one of the most critical components in a chiller system.

  • Function: Controls refrigerant flow into the evaporator to maintain correct superheat.

  • Types Available: Thermostatic (TXV), electronic (EEV), and pressure-actuated variants.

Why Choose Reynold India for Chiller Parts?

✅ Wide Product Range – From switches and valves to PLCs and HMIs, we offer everything in one place.
✅ Industry Expertise – 25+ years in HVAC and industrial refrigeration solutions.
✅ Custom Solutions – Parts tailored for your chiller system specifications.
✅ Pan-India Support – Fast delivery and expert technical support across India.

Conclusion

Every part in a chiller system—from HP/LP switches to PLCs, HMIs, and expansion valves—plays a crucial role in ensuring performance, safety, and energy efficiency. Whether you’re building a new system or maintaining an existing one, Reynold India provides durable, precision-engineered components to meet your HVAC needs.