Relief valves are called safety valves and are generally installed on closed system equipment and some safety protection systems. When the pressure in the equipment or pipeline exceeds the set pressure of the pressure relief valve, it will automatically open the pressure relief to ensure that the pressure of the medium in the equipment and pipeline is under the set pressure and protect the equipment and pipeline to prevent accidents. Today is to introduce to everyone is the principle of pressure relief valve , to see how the pressure relief valve works and what are the characteristics of it!
How Pressure Relief Valve Works
The pressure relief valve is a type of hydraulic control valve. Its main valve is divided into upper and lower parts by a diaphragm. The lower chamber of the diaphragm is a water flow passage, and the upper chamber is a control room, which controls the valve valving of the main valve. Open and close. The pilot valve itself is a pressure relief valve. It also has a control room and a water flow channel. The valve flap is opened and closed by the control room. The needle valve is a throttle valve, which controls the flow of water in the connecting pipe.
Take a look at the role of the pressure relief valve in the fire water supply system. In the process of the water supply system, the main pipeline is flowing from left to right, all the way to the water control valve control room, when the water pressure is less than When the pressure is fixed, the thrust of the pilot valve spring is greater than the pressure of the water and the pilot valve flap is closed. Another way to control the water through the throttle needle valve into the upper cavity of the main valve produces a static pressure, the pressure of the upper chamber and the pressure in the raw flow channel is equal. Since the upper plane of the main valve flap is larger than the lower plane, the pressure of the upper chamber on the septum is larger than the pushing of the water in the main channel, so that the main valve is in the closed state.
Look at the role of the pressure relief valve in the electric water heater, in the electric water heater in the pressure relief valve is to achieve the maximum safety pressure when it can automatically open, reduce pressure to ensure safety. The most common is the pressure cooker on the home Pressure valve, he is a simple mechanical pressure relief, as well as heating and air conditioning system pressure relief valve, is a floating pressure relief valve. Is the system pressure exceeds the design requirements, the pressure release part of the system to work properly A kind of valve.
Pressure relief valve features
1. Accurate and consistent pressure of safety and stability. Once overpressure, pressure relief valve can fully open and relieve pressure.
2, adjustable speed, eliminate pressure fluctuations.
3, diaphragm drive mechanism to minimize the operational delay.
4. It can be installed in any position. It can be repaired and checked without changing the pressure setting value or removing it from the pipeline.
The above is to introduce the relief valve working principle and the characteristics of the pressure relief valve. I believe through the above simple introduction you have a certain understanding of the pressure relief valve. If you want to learn more about the pressure relief valve, please continue to pay attention to this site, more exciting so stay tuned!
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