Safety valve MSW 1/2 inch x 3/4 inch 10 bar for DHW installations. 42423

### Safety valve for domestic hot water systems

This safety valve from Afriso, catalog number 42423, is designed to protect domestic hot water (DHW) tanks from excessive pressure build-up. It is a key component ensuring safe and reliable operation of the installation, both in single-family homes and multi-family buildings. The angular design (90°) facilitates installation in tight spaces.

The MSW valve with a blue knob is designed for continuous operation and is characterized by a solid construction made of CW617N brass, which guarantees its durability and corrosion resistance. The silicone membrane ensures tightness and reliable operation for a long time. Using a safety valve is not only a matter of meeting standards, but above all protecting the installation and users from potential damage caused by excessive pressure.

Specification and application

The valve has internal BSPP-G threaded connections with diameters of 1/2 inch and 3/4 inch, ensuring compatibility with most standard DHW installations. The valve opening pressure is 10 bar, which means the valve will start to release water when the pressure in the installation exceeds this value. This protects the tank from damage in the event of a thermostat failure or other temperature control elements.

This valve complies with pressure directive 2014/68/EU and has TÜV marking and a Type Examination Certificate issued by the Office of Technical Inspection, confirming its high quality and safety of use. It also has a PZH Hygienic Certificate, guaranteeing its suitability for contact with drinking water. The maximum heating power of the installation protected by this valve is up to 50 kW (according to TUV) or 236.5 kW (according to UDT), making it suitable for both small and large installations.

• Overpressure protection: Protects the DHW tank from damage caused by excessive pressure in the installation.
• Durable construction: Made of CW617N brass ensures corrosion resistance and long life.
• Wide application: Compatible with most standard DHW installations, thanks to BSPP-G 1/2" x 3/4" threaded connections.
• Quality certificates: Has TÜV marking, UDT Type Examination Certificate and PZH Hygienic Certificate - a guarantee of safety and compliance with standards.
• Easy installation: The angular design facilitates installation even in limited spaces.
• Functional control: Regular checking of the valve's operation (at least once every six months) by manually opening the knob allows you to ensure its efficiency - water outflow confirms correct operation.