VALVES PRODUCT NEWS

What is the purpose of valve preliminary selection? The selection of valve selection is often not achieved overnight, especially for beginners. In order to calculate the discharge coefficient, estimate the noise, etc. It is necessary to select the structure of the valve body to obtain some calculation parameters. If the calculation results do not meet the requirements, the valve type should be re selected. The actuator, the form of upper

How do valve positioners and control valves form a loop? The valve positioner is the main accessory of the control valve. It is used with the regulating valve to receive the output signal of the regulator, and then control the regulating valve with its output signal. After the regulating valve acts, the displacement of the valve stem is fed back to the valve positioner through the unloading device. Therefore, this

What is the difference between traditional valve positioner and intelligent valve positioner? The valve opening signal indicated by the traditional valve positioner is actually the signal output from the indicating computer or instrument to the valve positioner, so the actual site position often deviates from the feedback position. The intelligent valve positioner is equipped with a valve position feedback signal transmitter, which can output the actual action position signal of

What are the structural forms of three-way solenoid valve? For what occasion? Three way solenoid valve can be divided into ordinary type, waterproof type, explosion-proof type and so on. According to its action mode, it can be divided into direct acting type and pilot type. In the direct acting type, the coil pulls in the iron core to directly drive the stop valve to switch the gas path; in the

What is the principle of caliber calculation? In different automatic control systems, the flow, medium, pressure, temperature and other parameters vary greatly, and the flow coefficient of the control valve is tested under the pressure difference of 100KPA and the medium is normal temperature water. It is not possible to compare the actual flow with the flow coefficient of the valve (because of the different conditions of pressure difference and

Diaphragm valve The structure of diaphragm valve is very different from that of general valve. It is a new type of valve and a special type of block valve. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts. It is widely used in various fields. The

Gasket is a mechanical seal between two objects, which is usually used to prevent pressure, corrosion, and pipeline natural thermal expansion and contraction leakage. Since the machined surface cannot be perfect, the irregularity can be filled with a gasket. 1. The correct selection of sealing gasket is the key to ensure no leakage of valve. For the same working condition, there are several kinds of pads Notes on Selection Correct

Valve is used to control the medium in the pipeline, with a movable mechanism of mechanical products. Its basic function is to connect or cut off the flow of pipeline medium, change the flow direction of medium, adjust the pressure and flow of medium, and protect the normal operation of pipeline and equipment. Valve type With the development of modern science and technology, valves are widely used in T industry,