Safety Relief Valve FLAMCO PRESCOR 3/4" x 1" Thread 3 bar (model 27024)

FLAMCO PRESCOR 3/4" x 1" Thread 3 bar safety relief valve (model 27024) is a compact overpressure protection device designed for closed heating and domestic hot-water systems. The valve features threaded 3/4" x 1" connections and a factory-set opening pressure of 3 bar, providing automatic pressure discharge to prevent system damage from excessive pressure. It is constructed for compatibility with typical residential and light commercial boiler and circulation installations where dependable pressure relief is required.

Advantages

The FLAMCO PRESCOR valve offers consistent pressure control through a precise 3 bar set point and threaded connections that simplify installation into existing pipework. Its compact design reduces space requirements near boilers and manifolds while providing automatic and repeatable discharge performance. Built to industry-relevant standards, the device helps protect pumps, heat exchangers and piping from overpressure events without requiring external power or complex controls.

Suitable for

• Closed hot-water heating systems in residential buildings
• Light commercial boiler and circulation systems
• Domestic hot-water installations with pressurised circuits
• Replacement or upgrade of existing pressure relief valves with compatible thread sizes

Key specifications

• Connection type: threaded 3/4" x 1"
• Set opening pressure: 3 bar (fixed)
• Application: closed heating and hot-water systems
• Operation: automatic pressure relief
• Mounting: inline installation in pipework

How to use

Install the FLAMCO PRESCOR valve in the system at a suitable location on the pressure side of the boiler or on the main circulating line, observing flow direction and correct thread engagement. Ensure all pipe connections are sealed and tightened to the manufacturer’s recommended torque, and that the valve outlet is routed safely to a drain or discharge point. After installation, pressurise the system gradually and check for leaks; verify that the valve remains closed at normal operating pressure and will open at the specified 3 bar set point during a controlled pressure test.

Usage recommendations

Use this valve only in closed heating and hot-water circuits with compatible thread sizes. Regularly inspect the valve and adjacent pipework for corrosion or blockage and test system pressure relief functionality during scheduled maintenance intervals. Replace the valve if any leakage, mechanical damage, or persistent corrosion is detected to maintain reliable overpressure protection.