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Safety Valves
Versatile Safety Valves for Multiple System Types
Flamco safety valves offer dependable overpressure protection across a wide range of systems, including heating, cooling, potable water, and solar thermal. Designed to open automatically when pressure exceeds safe limits, these EN-compliant valves help prevent damage and maintain system integrity. With various pressure ratings and configurations, they’re a trusted solution for both domestic and commercial installations.
For sealed central heating and chilled water (cooling) installations. The valve opens when the pressure increases excessively.
Prescor safety valves have a special shape that not only achieves a perfect seal but also provides a large blow-off capacity. The valve seal is made of high-quality rubber, which is heat-resistant to 140 °C, and the hardness of the rubber adjusts to the set pressure of the safety valve. In this way, the valve cannot stick to the seat.
All valves are tested before they leave our facility and are available for heating and cooling installations as well as for the protection of various hot water storage appliances.
- Specially designed pop action for full discharge at opening pressure to reduce the pressure quickly.
- High-quality materials and state-of-the-art design features guarantee a high degree of safety.
- CE-conformity mark (PED 2014/68/EU), for application areas according to the Pressure Equipment Directive.
- The opening pressure of all valves is individually tested.

Prescor
For sealed central heating and chilled water (cooling) installations.
Prescor safety valves have a special shape that not only achieves a perfect seal but also provides a large blow-off capacity. The valve seal is made of high-quality rubber, which is heat-resistant to 140 °C, and the hardness of the rubber adjusts to the set pressure of the safety valve. In this way, the valve cannot stick to the seat.
All valves are tested before they leave our facility and are available for heating and cooling installations as well as for the protection of various hot water storage appliances.
- Ideal safeguard for larger systems.
- More than one Prescor S safety valve may be fitted to a system so that it can meet the required capacity if the applicable regulations allow.
- With diaphragm protects the spring, preventing water leakage via the spindle.

Prescor S
Safety valves with pressure gauge for sealed central heating and chilled water (cooling) installations.
Prescor safety valves have a special shape that not only achieves a perfect seal but also provides a large blow-off capacity. The valve seal is made of high-quality rubber, which is heat-resistant to 140 °C, and the hardness of the rubber adjusts to the set pressure of the safety valve. In this way, the valve cannot stick to the seat.
All valves are tested before they leave our facility and are available for heating and cooling installations as well as for the protection of various hot water storage appliances.

Prescomano
For protecting water heaters and potable water systems.
When the system pressure reaches the set pressure, the Prescor B boiler valve begins to vent, whereby the pressure stops rising. If, due to specific circumstances, the pressure rapidly rises over the set pressure, the Prescor B boiler valve will open fully, creating a large blow-off capacity. This is a permanent, reliable safeguard against overpressure. Venting can be prevented by installing a suitably sized Airfix expansion vessel for sanitary systems.
The seating of Prescor boiler valves is designed so that it not only makes a perfect seal but can also achieve a large blow-off capacity. The hardness of the rubber is adapted according to the set pressure of the safety valve. Due to this combination of a specifically designed seating and special rubber, it is possible to achieve optimum safety.
- A wide range so that the correct valve can be selected appropriate to the application.
- It can be used in combination with any storage boiler system.
- Because of the ''pop'' effect, these valves have a high blow-off capacity.
- Solid brass housing.
- Valve seat with silicon-free rubber seal.
- Anti-ageing steel spring maintains the set pressure accurately.
- With a silicon-free diaphragm that prevents moisture and dirt from getting into the moving parts.
- Construction and choice of materials are your guarantee of accuracy and safety.

Prescor B
Specially designed for sealed solar installations.
Prescor safety valves have a special shape that not only achieves a perfect seal but also provides a large blow-off capacity. The valve seal is made of high-quality rubber, which is heat-resistant to 140 °C, and the hardness of the rubber adjusts to the set pressure of the safety valve. In this way, the valve cannot stick to the seat.
All valves are tested before they leave our facility and are available for heating and cooling installations as well as for the protection of various hot water storage appliances.
- Specially designed pop action for full discharge at opening pressure to reduce the pressure quickly.
- High-quality materials and state-of-the-art design features guarantee a high degree of safety.
- CE-conformity mark (PED 2014/68/EU), for application areas according to the Pressure Equipment Directive.
- The opening pressure of all valves is individually tested.

Prescor Solar
Open 90° tundish, fitted between the Prescor safety valve and the discharge pipe. It enables you to check through the opening whether the safety valve is discharging excess water.

Safety valve fitted with tundish.

Tundish
Domestic heating system filling device with safety valve and pressure gauge 0 - 4 bar.
Prescomano and ball valve are supplied separately from the fill and drain tap, so that mounting in all positions is possible.

Prescofiller