A44 Flange Closed Spring Loaded Safety Valve with Lever

Brief Introduction of HRSO Safety Valve 

        Safety valve is a safety device to prevent bursting of pressure equipment and containers or easily caused by pressure rise or pressure inside the container exceeding the limit. Safety valve is a safety device widely used in pressure systems such as pressure vessels, boilers, and pressure pipelines to ensure the safe operation of pressure systems. When the pressure of the container exceeds the design specification, the safety valve is automatically opened, and the exhaust gas reduces the excessive pressure in the device to prevent the damage of the container or pipeline. And when the pressure in the vessel drops to normal operating pressure, it automatically shuts down to avoid all the gas being exhausted due to the overpressure of the vessel, resulting in waste and production interruption. 

        The safety valve is mainly composed of three parts: valve seat, valve disc (valve core) and loading mechanism. Some valve seats are integral with the valve body, and some are assembled with the valve body, which communicates with the equipment. The valve disc is often associated with a valve stem, which is tightly fastened to the valve seat. Above the disc is a loading mechanism, and the size of the load can be adjusted. 

          When the pressure in the equipment is within a certain working pressure range, the force of the internal medium acting on the valve disc is less than the force applied by the loading mechanism on the valve, and the difference between the two constitutes the sealing force between the valve disc and the valve seat. The valve disc is pressed tightly against the valve seat, and the medium of the equipment cannot be discharged. When the pressure in the equipment exceeds the specified working pressure and reaches the opening pressure of the safety valve, the force of the internal medium acting on the disc is greater than the force exerted by the loading mechanism on it, so the disc leaves the valve seat, the safety valve opens, and the equipment The medium inside is discharged through the valve seat. 

             If the discharge volume of the safety valve is greater than the safe discharge volume of the equipment, the pressure in the equipment will gradually decrease, and after a short period of exhaust, the pressure will return to the normal working pressure. At this time, the force of the internal pressure acting on the valve disc is smaller than the force exerted by the loading mechanism on it, the valve disc presses the valve seat tightly, the medium stops discharging, and the equipment continues to operate under normal working pressure. 

              Therefore, the safety valve is closed or opened by itself to prevent the overpressure of the equipment through the fluctuation of the medium force on the valve disc and the force of the loading mechanism.

 Safety Valve A44 Model 

              A44 type closed full-lift safety valve with wrench is suitable for equipment and pipelines of air, steam, petroleum gas and other media with a working temperature of ≤ 300 ℃, as an overpressure protection device. When the pressure in the equipment and pipeline exceeds the allowable value, the valve opens automatically, and then discharges the full amount; when the pressure drops to the specified value, the valve automatically closes to ensure the safe operation of the equipment.

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