Thermostatic Mixing Valves G1001

A thermostatic mixing valve (TMV) is a valve that blends hot water with cold water to ensure constant, safe shower and bath outlet temperatures to prevent scalding. The storage of water at high temperature removes one possible breeding ground for Legionella; the use of a thermostat, rather than a static mixing valve, provides increased safety against scalding, and increased user comfort, because the hot-water temperature remains constant.

Key Features of Thermostatic Mixing Valves:
1 Temperature Regulation: The main function of a TMV is to regulate the temperature of the water supplied to a fixture or system. It ensures the water exiting the valve is within a safe and preset temperature range, typically between 38–42°C (100–108°F), though it can be adjusted for specific needs.

2 Automatic Temperature Adjustment: The valve automatically adjusts the mixing of hot and cold water based on the incoming water temperatures and pressures, maintaining the desired outlet temperature without the need for manual intervention.

3 Safety and Comfort: TMVs are commonly used in systems where safety is a concern, such as in domestic hot water systems, showers, and bathtubs, where there is a risk of scalding. They are also useful in healthcare settings (e.g., hospitals or care homes) to prevent burns or discomfort.

4 Protection Against Temperature Fluctuations: TMVs are equipped with a temperature-sensing mechanism (usually a thermostatic element) that reacts to changes in water temperature or pressure. If the hot water supply temperature increases or decreases unexpectedly, the valve adjusts the flow of cold water to maintain the desired outlet temperature.

5 Pressure Balance: Many thermostatic mixing valves also help balance the pressure between the hot and cold water supplies, ensuring a consistent flow rate and preventing situations where a change in pressure (e.g., from another fixture being used in the building) could lead to scalding or cold water shock.

How Thermostatic Mixing Valves Work:
1 Hot and cold water enter the valve from separate inlets.
2 The valve contains a thermostatic element (usually a wax capsule, a spring-loaded piston, or a bimetallic strip) that senses the temperature of the mixed water.
3 When the temperature deviates from the desired setting, the thermostatic element adjusts the mix of hot and cold water by either opening or closing the respective inlets.
4 As the temperature reaches the set point, the thermostatic element maintains the balance of hot and cold water, ensuring the output temperature stays consistent.

Applications of Thermostatic Mixing Valves:
Domestic Hot Water Systems

Healthcare: Hospitals and care homes

Commercial and Industrial:  commercial kitchens, washrooms, and other public facilities

Underfloor Heating Systems

Benefits of Thermostatic Mixing Valves:
Safety: Prevents scalding by ensuring the water temperature stays within safe limits, especially in environments where users may not be able to regulate temperature effectively (e.g., children or elderly individuals).
Energy Efficiency: Helps maintain an optimal, steady water temperature, preventing energy waste from fluctuations.
Comfort: Provides a consistent and comfortable water temperature for everyday use.
Durability: TMVs are built to withstand changes in water pressure or temperature, providing reliable long-term performance.

Technical Data:

Size: 1/2″, 3/4″, 15mm, 22mm

Material: brass, CW602N, CW511L

Max. working pressure: 10 bar – Static
Min. working pressure: 0.2 Bar : Dynamic
Max. inlet temperature: 85˚C
Inlet temperature range – hot supply: 55 – 65°C – cold supply: 0.5 – 25°C
D08 working pressure – low pressure: 0.2 – 1.0 – high pressure: 1.0 – 5.0
Max. inlet pressure ratio (H/C or C/H): 5:1
Accuracy: ±3˚C
Setting Range: 30 to 50˚C
Min. temperature difference between inlet hot water and outlet mixed water: 10˚C
Min. flow for stable operation 4 l/m