Safety Relief Valve CALEFFI 3/4" 2.5 bar (model 311525)

Safety Relief Valve CALEFFI 3/4" 2.5 bar is a compact pressure relief device designed to protect closed pressurized systems by automatically discharging excess pressure when the set value of 2.5 bar is exceeded. Constructed in metal for durability, the valve features 3/4" inlet and outlet connections for straightforward inline installation in potable water and heating circuits where reliable overpressure protection is required.

Advantages

The valve provides consistent pressure protection at a fixed set point of 2.5 bar and operates automatically without external power. Its compact metal body offers mechanical strength and corrosion resistance appropriate for domestic and light commercial water and heating installations. The simple inline configuration with standard 3/4" connections enables fast replacement or integration into existing piping without special adapters. Maintenance is limited to occasional inspection and, if needed, replacement, keeping life-cycle costs low.

Suitable for

• Domestic hot water systems requiring overpressure protection at 2.5 bar
• Closed-loop heating installations such as radiators and underfloor heating
• Boiler circuits and small hydronic systems
• Applications where a compact, inline metal relief valve is preferred

Key specifications

• Set pressure: 2.5 bar
• Connection size: 3/4" inlet and outlet
• Construction material: metal body designed for durability
• Function: automatic pressure relief for closed systems
• Mounting: inline installation

How to use

Install the CALEFFI safety relief valve in the system line where overpressure protection is required, observing flow direction and ensuring correct 3/4" threaded connections. The valve must be fitted according to applicable plumbing codes and manufacturer installation practices, with access for inspection and discharge piping routed safely to a suitable drain if necessary. No electrical supply or manual actuation is required; the valve opens automatically when system pressure exceeds 2.5 bar and reseats as pressure falls below the set point. After installation, perform a pressure test to verify correct operation and check for leaks.

Usage recommendations

For reliable operation, use the valve only within its intended media and pressure range, protect it from freezing and debris, and schedule periodic visual inspections. If the installation supplies potable water, ensure compatibility with drinking water regulations and flush the discharge outlet after activation. In professional installations, verify that discharge piping slopes to a safe drainage point and that local codes for overpressure relief devices are followed.