Customization of diaphragm valve production

The valve head is pressed down by the valve stem that rotates with the handwheel, causing the valve to close. Lift the valve head up with a spring and air pressure to open the valve. The diaphragm separates the medium from the atmosphere. Its advantages are good sealing, stability, and small dead zone. Easy to eliminate trace residual gases; There is no relative friction between the valve head and valve seat, and no metal particles will fall into the medium. It can achieve comprehensive performance of high pressure, vacuum, high and low temperature simultaneously.

Diaphragm valves are a common industrial valve, also known as globe valves. Its main function is to control the flow direction and flow rate of fluids, which can be achieved by opening or closing valves. It is widely used in fields such as petroleum, chemical industry, metallurgy, power, water treatment, etc.
The main characteristics of diaphragm valves are simple structure, small volume, and light weight. It consists of a valve body, a valve cover, a diaphragm, and a valve stem. The valve body and cover are usually made of cast iron or cast steel, which has good corrosion resistance and rigidity. Diaphragms are usually made of materials such as chloroprene rubber and polytetrafluoroethylene, which have good wear and corrosion resistance. The valve stem serves to connect the valve cover and diaphragm, usually made of stainless steel material with good strength and corrosion resistance.
The working principle of a diaphragm valve is to control the opening and closing of the diaphragm through the upward and downward movement of the valve stem. When the valve stem rises, the diaphragm is pressed onto the valve seat, achieving valve closure. When the valve stem descends, the diaphragm leaves the valve seat, achieving valve opening. By controlling the movement of the valve stem, the flow direction and flow rate of the fluid can be controlled.
Diaphragm valves have many advantages. Firstly, it has good sealing performance. The contact area between the diaphragm and the valve seat is large, which can effectively prevent fluid leakage. Secondly, the structure of the diaphragm valve is simple and easy to maintain. The diaphragm is a key component of the valve, and the valve can be repaired by simply replacing the diaphragm without the need to disassemble the entire valve. In addition, the opening and closing torque of the diaphragm valve is small, easy to operate, and the flow rate can be controlled by adjusting the stroke of the valve stem.
Due to the aforementioned advantages, diaphragm valves have been widely used in practical applications. Firstly, it is widely used in the petroleum and chemical industries. In the petroleum industry, diaphragm valves are often used for cutting and connecting pipelines to control the flow of crude oil, natural gas, etc. In the chemical industry, diaphragm valves are often used to control the flow of various chemicals and have good corrosion resistance. Secondly, diaphragm valves are also widely used in the metallurgical and power industries. In the metallurgical industry, diaphragm valves are often used for the control of high-temperature and high-pressure gases. In the power industry, diaphragm valves are often used for control of boiler feedwater systems and circulating water systems. In addition, diaphragm valves are also widely used in the water treatment industry, such as sewage treatment, water supply, and drainage systems.
Although diaphragm valves have many advantages, they also have some shortcomings. Firstly, the diaphragm valve has a relatively high resistance to the fluid. The structure of the diaphragm valve determines that there will be significant frictional resistance when the fluid passes through the valve, thereby reducing the flow rate of the fluid. Secondly, the pressure resistance performance of diaphragm valves is relatively weak. The membrane material itself has poor pressure resistance and is easily affected by high temperature and pressure, thereby affecting the service life of the valve. In addition, the price of diaphragm valves is relatively high, which may generate certain economic pressure for some users with limited budgets.
In short, diaphragm valves are a type of valve with broad application prospects, with advantages such as simple structure, small volume, and light weight. It has important applications in industries such as petroleum, chemical, metallurgy, power, and water treatment. Although diaphragm valves also have some shortcomings, with the continuous progress of technology and material improvement, it is believed that diaphragm valves will be further developed and improved in the future.