Thermostatic mixing valve Afriso ATM 331 DN20 3/4" (model 1233110)

Thermostatic mixing valve Afriso ATM 331 DN20 3/4" is a compact, thermostatic valve engineered to blend hot and cold water to a stable mixed outlet temperature. Designed for DN20 (3/4") pipe connections, the valve provides automatic temperature regulation that reduces the risk of scalding and keeps a consistent supply temperature in domestic or commercial hot water systems. The body and internal mechanism are sized for service outlets, washrooms, showers and other installations where maintained mixed water temperature is required.

Advantages

The valve maintains a constant mixed water temperature by automatically adjusting flow ratios between hot and cold in response to changes in supply conditions, ensuring stable delivery even with fluctuating inlet pressures or temperatures. Its compact DN20 design eases installation in confined spaces and on standard 3/4" piping. The thermostatic element provides reliable sensitivity for fast reaction to temperature shifts, supporting both safety and comfort in continuous use. Materials and construction are suitable for routine domestic and commercial applications where durability and consistent operation are needed.

Suitable for

• Domestic bathrooms and showers where stable outlet temperature is required
• Service outlets and sink installations in residential or light commercial settings
• Washrooms and public facilities requiring scald protection
• Secondary hot water circuits and tempering of hot water from storage heaters

Key specifications

• Connection size: DN20 (3/4") compatible threads
• Function: Thermostatic mixing to a preset outlet temperature
• Operating principle: Automatic blend of hot and cold based on thermostatic element
• Typical application temperature control: Domestic and light commercial hot water systems
• Installation orientation: Inline fitting for plumbing installations

How to use

Install the thermostat mixing valve in the cold and hot inlet lines and connect the mixed outlet to the supply point following local plumbing codes. Set the required outlet temperature according to system requirements and any applicable safety standards. After installation, check for leaks and verify the mixed water temperature under expected supply conditions. Periodic inspection and maintenance of supply filters and strainers are recommended to prevent debris from affecting valve operation.

Usage recommendations

Use with properly balanced hot and cold water supplies and install isolation valves for service access. Adhere to local regulations on maximum allowable outlet temperatures and include thermostatic fail-safes where required for vulnerable installations. Regular flushing and occasional service will help maintain reliable temperature control and prolong valve life.