The functions are as follows:
1. Ensure that the electric water heater relieves the pressure in time when the water pressure is too high during the heating process to ensure safe use.
2. Prevent the water from flowing back when the water is stopped, and ensure that the machine must be full of water to avoid dry burning.
3. Prevent the water pressure of the liner from being too high. When the water pressure reaches 0.75MPa, it will automatically drain and reduce the pressure to prevent damage to the liner from excessive water pressure and prolong the life of the liner. Prevent the harm caused by the inner tank bursting.
Extended information:
The exhaust valve is a safety device designed to prevent pressure equipment and containers from bursting due to pressure rise or the internal pressure of the container exceeding the limit. The exhaust valve is a safety device widely used in pressure systems such as pressure vessels, boilers, and pressure pipelines to ensure the safe operation of the pressure system. ?
When the pressure of the container exceeds the design specification, the exhaust valve automatically opens to discharge the gas to reduce the excessive pressure in the device and prevent damage to the container or pipeline. When the pressure in the container drops to the normal operating pressure, it will automatically close to avoid exhausting all the gas due to overpressure in the container, resulting in waste and production interruption. The exhaust valve is mainly composed of three parts: valve seat, valve disc (valve core) and loading mechanism.
Some valve seats are integrated with the valve body, and some are assembled with the valve body, and are connected to the equipment. The valve disc is often associated with a valve stem, which is tightly fastened to the valve seat. There is a loading mechanism above the valve disc, 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 exerted by the loading mechanism on the valve. The difference between the two constitutes the valve disc and valve disc. The sealing force between the seats makes the valve disc press the valve seat tightly, and the medium of the equipment cannot be discharged.
When the pressure inside the equipment exceeds the specified working pressure and reaches the opening pressure of the exhaust valve, the force of the internal medium acting on the alarm flap is greater than the force exerted on it by the loading mechanism, so the valve flap leaves The valve seat, the exhaust valve opens, and the medium in the equipment is discharged through the valve seat. If the displacement of the exhaust valve is greater than the safe discharge capacity of the equipment, the pressure inside the equipment will gradually decrease, and after a short period of exhaust, the pressure will Return to normal operating pressure.
At this time, the force exerted by the internal pressure on the valve disc is less than the force exerted on it by the loading mechanism. The valve disc presses the valve seat tightly, the medium stops being discharged, and the equipment continues to operate at normal working pressure. . Suitable for chemical industry, environmental protection, food and other industries.