The treatment method of the valve is not tightly closed - Wuzhong instrument

Valve application requirements (1) General gate valves, ball valves, and globe valves are prohibited from dispatching according to their structural characteristics. However, in process design, it is widely used for mediation. Because of the scheduling application, the valve seal has been in a throttling state for a long time, and the impurities in the oil have washed the seal, endangering the seal.

"Pass" and "position" are important concepts of pneumatic reversing solenoid valves. Different "passes" and "positions" constitute different types of pneumatic reversing solenoid valves. Generally speaking, the "two-position valve" and "three-position valve" refer to the valve core of the reversing valve with two or three different operating directions. The so-called "two links" ...

(1) The sealing pair is spherical, disc eccentricity rotation planning The valve sealing pair is spherical planning, and the sealing effect is good. Together with the disc rotation center is planned to have a bias with the center of the valve seat, so the valve disc and the valve seat form a bias cam wedge sealing effect when closed, the valve ...

The structure of the adjustable pressure reducing valve is composed of a main valve, a pressure feedback system, and a control pipeline. The main valve is composed of main parts such as valve body, diaphragm seat, valve cover, diaphragm, valve stem, valve plate, etc. The adjustable pressure reducing valve is installed on the one-way water supply pipeline in the city, which can reduce the upstream (inlet) pressure of the higher valve.

1. When the sealing surface is grinding, the grinding tools, abrasives, abrasive cloth and sandpaper and other objects should be selected in a reasonable grinding method, and the coloring inspection should be carried out after grinding, and the sealing surface should be free of indentations, cracks, scratches and other shortcomings; Second, the connection between the valve stem and the closure should meet the planning requirements, and the top center is not suitable.

The selection of control valve is a very complex thing, in order to ensure the use of control valves, customers only need to provide process parameters and use requirements to valve manufacturers, because valve manufacturers have rich experience in valve use, so they can provide customers with the best cost-effective valve products. ...

1. The corrosion of the valve is usually understood as the damage to the metal material of the valve under the chemical or electrochemical environmental effect. Because the corrosion phenomenon is presented in the spontaneous interaction between the metal and the surrounding environment, therefore, how to isolate the metal from the surrounding environment or more use non-...

From the perspective of product application, hard seal ball valve defects can be roughly divided into the following two categories: non-technical faults and skill defects. The following text mainly introduces the analysis and solution of non-technical problems of hard seal ball valves; ...

　　First, the effect of pipeline identification Why do you need to do pipeline identification? Intent: To facilitate the identification of substances in industrial pipelines, ensure safe production, and avoid misjudgment in operation and equipment maintenance. Carry out ...

Pneumatic control valve is one of the instruments widely used in petrochemical enterprises. It is of great significance to ensure the normal operation and safe production of the process equipment by operating accurately and normally. Therefore, it is necessary to strengthen the maintenance of pneumatic control valves. First, the key points to check the location during maintenance ...

When using stainless steel multistage pumps, it is first necessary to confirm the usefulness and functional parameters of the multistage pump and select the pump type. Criteria and basis for the selection of multistage pumps: 1. Make the type and function of the selected multistage pump fit the process parameters such as flow, head, pressure, temperature, NPSH, suction stroke, etc.

1. Units and scales (scales) The scale (scale) unit of the temperature gauge is the Celsius temperature (°C). 2. Detect (measure) the penetration length of the element The length of the penetration should be selected in such a way as to insert the detection (test) element ...

The hydraulic maintenance module uses the hydraulic locking method to control the inlet and outlet oil circuits and load oil circuits of the electro-hydraulic servo valve, and the module has the following three functions: 1. Locking function When the system is in normal condition, the hydraulic lock is in the guide ...

From simple shut-off valves to a wide range of valves in very complex automatic control systems, the varieties and standards are very complex. The valve can be used to control the activities of various types of fluids such as air, water, steam, various corrosive media, oil, liquid metal and other media. It is understood that from 2015 to 2018, ...

The self-operated control valve, also known as the self-operated control valve, is based on the pressure and temperature of the medium flowing through the valve itself as an energy source, and uses the reaction signal (pressure, pressure difference, temperature) at the output end of the valve to be transmitted to the actuator through the signal tube, and then drives the valve disc and then changes the opening of the valve to achieve the adjustment pressure.

(1) Thread damage due to excessive operation; (2) lack of lubrication or lubricant failure; (3) Stem bending and torsion; (4) The surface finish is not good; (5) Cooperative public service is forbidden and bites too tightly; (6) The stem nut is skewed; (7) Improper selection of information, such as valve stem and ...

G2010 ball valve for long-distance pipeline is designed for the transportation of long-distance pipeline media, which is a typical long-distance pipeline ball valve, which is suitable for various oil, natural gas, city gas pipelines, and can also be used in the equipment of general chemical products. The valve is completely in line with the United States Petroleum Institute API in terms of performance...

The conditioning valve, also known as the control valve, is a device that uses power operation to change the process parameters such as the flow, pressure, temperature, and liquid level of the conditioning pipeline medium in the field of industrial automation process control. It is mainly composed of the operating fulfillment mechanism and the regulating valve body, which receives relevant signals and changes the opening of the valve.

The commonly used medium for valve pressure test is water, oil, air, steam, nitrogen, etc., and the pressure test methods of various valves are as follows. (1) Globe valve and throttle valve The strength test of globe valve and throttle valve, usually the assembled valve is placed in the pressure test frame, the valve disc is turned over, and the medium is injected to...

　　Selection: The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. The butterfly valve has a simple structure, small size, light weight, only a few parts, and only needs to rotate 90° to quickly open and close, the operation is simple, and the ...