Description
Clorius Self-Acting Thermostats (V2, V4 & V8)
Reliable Mechanical Temperature Control Without External Power
The Clorius Self-Acting Thermostats are mechanical temperature controllers designed to regulate heating and cooling systems without requiring electricity or compressed air. Working on the principle of liquid expansion, these thermostats automatically adjust a compatible Clorius control valve to maintain a stable process temperature. They are widely used in district heating, industrial process plants, marine systems, HVAC installations, and utility applications where reliability and energy efficiency are essential.
Key Features
- Self-acting mechanical thermostat
- No external power supply required
- Available models:
- V2.05 – Closing force 400 N
- V4.03 / V4.05 / V4.10 – Closing force 500 N
- V8.09 / V8.18 – Closing force 800 N
- Standard temperature range: 0°C to 160°C
- Optional temperature range: −30°C to 280°C
- Capillary tube lengths from 3 m to 21 m
- Available with rod or spiral sensors
- Copper or stainless steel sensor options
- Compatible with Clorius 2-way and 3-way control valves
- Suitable for heating and cooling applications
Benefits
No External Power Required
Unlike electric or pneumatic controllers, Clorius self-acting thermostats operate solely through the thermal expansion of liquid inside the sensor and capillary tube. This eliminates wiring, power consumption, and dependence on external control systems, ensuring continuous operation even during power outages.
Accurate Temperature Regulation
The liquid-filled sensing system reacts quickly to temperature changes, providing stable and precise control. Depending on the thermostat model, the neutral (dead) band ranges from 1.5°C to 2.5°C, allowing excellent control performance for industrial processes.
Flexible Installation
Multiple sensor styles, capillary lengths, and temperature ranges allow the thermostat to be adapted to a wide variety of heating and cooling systems, including tanks, pipelines, heat exchangers, and air ducts.
Rugged Industrial Design
Designed for demanding industrial environments, Clorius thermostats provide long service life with minimal maintenance. Stainless steel versions are available for corrosive or marine environments where non-magnetic construction is required.
Operating Principle
The thermostat consists of:
- Temperature sensor
- Liquid-filled capillary tube
- Adjustment cylinder
As the sensor temperature increases, the liquid expands and generates a mechanical force that moves the valve stem, reducing or increasing the flow of the heating or cooling medium. This closed-loop mechanical system continuously maintains the desired temperature without electronic controls.
Typical Applications
Clorius Self-Acting Thermostats are widely used in:
- District heating substations
- Central heating systems
- Industrial process temperature control
- Heat exchangers
- Hot water storage tanks
- Steam systems
- Thermal oil systems
- Marine engine cooling
- HVAC systems
- Utility plants
- Industrial cooling circuits
Technical Specifications
| Specification | Value |
|---|---|
| Product | Self-Acting Thermostat |
| Models | V2.05, V4.03, V4.05, V4.10, V8.09, V8.18 |
| Operating Principle | Liquid Expansion |
| Power Supply | Not Required |
| Temperature Range | 0°C to 160°C (−30°C to 280°C on request) |
| Closing Force | 400 N / 500 N / 800 N |
| Capillary Length | 3–21 m |
| Sensor Types | Rod Sensor, Spiral Sensor |
| Sensor Material | Copper or Stainless Steel |
| Compatible Valves | Clorius 2-Way & 3-Way Control Valves |
| Maximum Service Temperature | Up to 350°C with KS Cooling Unit |
| Typical Media | Water, Steam, Thermal Oil, Cooling Water |
Why Choose Clorius Self-Acting Thermostats?
Clorius self-acting thermostats provide a simple, reliable, and energy-efficient solution for temperature control where electrical power is unavailable or undesirable. Their proven liquid-expansion technology, robust mechanical construction, and compatibility with a wide range of Clorius control valves make them ideal for industrial, marine, district heating, and HVAC applications. With flexible sensor configurations and temperature ranges extending up to 280°C (or 350°C with an optional cooling unit), they deliver dependable performance in even the most demanding environments.
