Temperature and pressure relief valve for DHW 3/4" male thread x22mm 3 bar 309530

Safety valve for DHW – protection of the installation and comfort of use

This temperature and pressure relief valve from Caleffi is a key element of every domestic hot water installation. Its task is to protect the tank and the entire installation against excessive pressure and temperature increases, ensuring safe and reliable system operation. Made of high-quality materials, this valve guarantees long-lasting and trouble-free operation.

Construction and application

The safety valve from the 309 series is designed for mounting in domestic hot water tanks. Its construction based on proven technical solutions, compliant with Directive 97/23/CE and standard EN 1490, ensures effective protection against exceeding the permissible operating parameters of the installation. In the event of a pressure increase above the set value (3 bar in this model) or a temperature above 90°C, the valve will automatically open, releasing excess water and preventing damage.

Made of dezincification-resistant brass, with sealing elements and an EPDM membrane, the valve is corrosion-resistant and ensures long-term reliability. In addition, the steel spring and nylon adjustment knob guarantee precise operation and ease of use. The discharge capacity of this model is 25 kW, making it suitable for most standard DHW tanks.

Key features and benefits

• Safety first: Protects the installation from the effects of excessive pressure and temperature, minimizing the risk of failure and costly repairs.
• Compliance with standards: Meets the requirements of Directive 97/23/CE and standard EN 1490, confirming its high quality and reliability.
• Durable construction: Made of high-quality corrosion-resistant materials – brass, EPDM and steel – ensures long-term operation.
• Precise adjustment: Setting the pressure to 3 bar allows you to adapt the valve to the specific operating conditions of the installation.
• Easy installation: 3/4” GZ x Ø 22 mm threaded connections make it easy to integrate the valve into the existing water installation.
• Versatility: Possibility of mounting in vertical or horizontal position increases flexibility during installation.
• High discharge capacity: 25 kW ensures effective removal of excess energy in the event of exceeding the permissible operating parameters.

Remember to select the correct safety valve for the parameters of your installation – consult a designer or plumber!