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Yuhuan Xianyi Pipe Industry Co., Ltd.

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11

2021

Electric control valve how to control the various factors of the pipeline medium

Electric control valve is to use the power source to drive the electric actuator and then drive the valve to throttle, it is an important implementation unit instrument in industrial automation process control. With the increasing degree of automation in the industrial field, it is being used more and more in various industrial production fields. Compared with the traditional pressure regulating valve series, the electric regulating valve has obvious advantages: the electric single-seat regulating valve is energy-saving, environmentally friendly, and the installation is more quick and convenient. The electric control valve drives the differential pressure control valve series by receiving the signal from the industrial automation control system to change the cross-sectional area between the valve core and the valve seat to control the flow, temperature, pressure and other process parameters of the pipeline medium to realize the automatic adjustment function. The electric actuator of the electric sleeve control valve is an electronic integrated structure with servo amplifier. The control signal and power supply of the field and pneumatic grinding control valve series can control the valve opening to achieve the adjustment of pressure, flow, liquid level, temperature and other parameters. Note: In order to ensure that the control valve can work normally when driving, and the safe operation of the system, the new valve before installation, should first check the valve on the nameplate mark is consistent with the design requirements. Article 3: If the control valve in the original system has been overhauled, in addition to the above-mentioned items, it should also check the tightness of the stuffing box and joints of the old valve. Fourth: control valve in the field use, many often not because of the control valve itself caused by the quality, but the electric control valve installation caused by improper use, such as: installation environment, installation position and direction or improper or pipeline is not clean and other reasons. Article 1: The regulating valve belongs to the field instrument, and the ambient temperature should be in the range of -25~60 ℃ and the relative humidity is 95%. If it is installed in the open air or high temperature occasions, should take waterproof, cooling measures. Where there is a source, keep away from the source or increase anti-vibration measures. The second: electric control valve should generally be installed vertically, under special circumstances can be tilted, such as the tilt angle is large or the valve itself is too heavy on the valve should be increased support protection. Article 3: The installation of the control valve pipeline is generally not too high from the ground or floor. When the pipeline height is greater than 2m, the platform should be set as much as possible to facilitate the operation of the hand wheel and facilitate maintenance. Fourth: electric control valve installation before the pipeline cleaning, remove dirt and welding slag. After installation, in order to ensure that no impurities remain in the valve body, the valve should be cleaned again, that is, all valves should be opened when passing into the medium to avoid impurities stuck. After using the handwheel mechanism, it should be restored to the original neutral position. Article 5: In order to enable the electric control valve to continue the production process in the event of failure or maintenance, the control valve should be added with a bypass pipeline.

11

2021

Manual valve in use need to pay attention to the problem

Manual valve is the most widely used valve, its handwheel or handle, is in accordance with the ordinary manpower to design, taking into account the strength of the sealing surface and the necessary closing force. Therefore, you cannot use long levers or long slabs to move. Some people are accustomed to using spenders, and they should be strictly careful not to use too much force, otherwise it is easy to damage the sealing surface, or the board breaks the handwheel and handle.

11

2021

Gate valve installation and use

Gate valve is a block valve, sealing performance is not as good as the stop valve. The main "duty" of the gate valve is to "cut off the flow", as well as to a small resistance: "freewheeling". It should not be used to adjust the flow and pressure of the medium, such as long-term adjustment, the sealing surface is easy to be washed and worn by the medium, affecting the sealing performance.

11

2021

What is the difference between cast iron valves and cast steel valves

The main difference between cast iron and iron steel valves is that the carbon content is different, and the carbon content directly affects the strength and plasticity of steel. Carbon steel is also called carbon steel, iron-carbon alloy with carbon content less than 2% WC. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur and phosphorus. According to the purpose, carbon steel can be divided into three types: carbon structural steel, carbon tool steel and easy-cutting structural steel.

11

2021

Working principle and characteristics of butterfly valve

The butterfly valve is based on the rotary valve to open and close the valve, driving the disc plate to rotate. In the cylindrical channel of the butterfly body, the disc rotates around the axis, mainly rotating the plate 90 degrees. When the flow control panel reaches 90 degrees, the valve is fully opened, and the medium flow can be adjusted by changing the angle of the valve.

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