Safety relief valve for pressure control in boilers in heating systems, on stored hot water cylinders in domestic hot water systems, and in water systems generally. When the calibrated pressure is reached, the valve opens and discharges to atmosphere, preventing system pressure from reaching levels that would be dangerous for the boiler and the components in the system. Calibrated pressures available: 0.1 MPa, 0.15 MPa, 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa, 0.9 MPa, 1.0 MPa. Deviation tolerance: for pressures up to 0.5 MPa, deviation is 0.015 MPa; for pressures above 0.5 MPa, deviation is 3% of the rated pressure. Key benefits and uses Protects boilers and system components from dangerous overpressure Provides reliable, calibrated relief at the set pressure Simple discharge path to atmosphere for rapid pressure reduction Available in a range of calibrated pressures to match system design Suitable for heating boilers, domestic hot water cylinders, and general water systems Applications and scenarios Residential heating boiler systems to prevent overpressure during operation or fault conditions Domestic hot water cylinders to maintain safe storage pressure and protect the tank General water systems in small commercial or domestic installations to safeguard piping and equipment from overpressure Notes The valve operates by releasing excess pressure through discharge to atmosphere once the calibrated pressure is reached Selection should match the intended system pressure setpoint within the provided options