What is a High Resistance Valve? What is a Low Resistance Valve?

The high and low resistance valves are mainly defined by the size of the medium through the flow pipeline, the torque of the low resistance valve is small, the switch is easy, the workmanship accuracy is generally relatively high, and the installation and maintenance are more convenient, such as the full bore ball valve. High resistance valves such as globe valves, low inlet and high output structures.

Yongjia Ou valve valve.

The pressure used by the valve is different, that is, the difference between high pressure and low pressure, usually PN16 belongs to low pressure, PN40 or more belongs to high pressure. There is also the size of the diameter, generally large-diameter valves, small resistance. Small-bore valves with high resistance and slow flow.

There is also a valve with a reduced diameter, which has high resistance and slow flow. Full bore valve, low resistance, fast flow.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

For example, the globe valve is high resistance, the ball valve is low resistance, and the steam pressure reduction can be used with the globe valve, which is about 90 ° once is to reduce the kilogram, and the globe valve is about 1 kilogram to reduce the pressure, which is the resistance, almost understand, right?

The resistance of the valve depends on the characteristics of the flow medium, and there is no standard definition of the resistance of the valve in China.

The spool of various valves with different structures has different flow capacity, and the larger the flow capacity, the less resistance it has to the fluid.

The flow capacity of the valve is distinguished by the spool movement category of the valve: 1Closed; 2.Sliding; 3.rotary; 4.Clamp-on.

Closed type is a variety of different fluid characteristics of the globe valve, its flow capacity is low, but has a strong role in regulating and controlling the fluid, and the sealing is very high when it is closed, it is a valve used more in the fluid pressure and flow regulation control, especially the needle valve can regulate the flow of the fluid with high precision. Closed valves are directional and cannot be reversed when installed.

The valve of the sliding mode of motion is the gate valve, the flow capacity is high, the pressure loss to the fluid is very low, when its opening is less than 25, there is still some control ability to the fluid, and when it is in the full open position, there is almost no pressure loss. At present, the novel cone spool can greatly improve its tightness, and the overall volume of the valve is larger. The gate valve is non-directional and can be installed at will.

There are three kinds of rotary valve core: butterfly valve, ball valve and, the flow capacity of butterfly valve and ball valve is very high, and its opening is a certain fluid control ability under 50, especially when the ball valve is fully opened, the passage in the middle of the ball is almost the same as the pipeline, and there is almost no pressure loss. In the control of fluid control requirements is not very precise, butterfly valve and ball valve are two kinds of valves that are used more, the tightness of ball valve is higher than that of butterfly valve, and there is no direction requirement when installing. At present, the novel eccentric butterfly valve also has a high degree of tightness, but thus there is directionality, and it is necessary to pay attention not to reverse installation in the installation, otherwise the valve will not be opened.

A is a small, manual valve that is similar to a ball valve but does not have the high tightness of a ball valve.

The clamp-on valve is to control the fluid by controlling the size of the flow passage, mainly for corrosive fluids, and is a relatively special valve, which is non-directional.

1.Ball valve: The resistance coefficient of ball valve is small, generally around the left.

2.Butterfly valve: The resistance coefficient of butterfly valve is small, generally around.

3.Globe valve: The resistance coefficient of globe valve is relatively large, generally between 5 and 10, so the pressure and flow situation of the piping system need to be carefully considered when choosing a globe valve.

4.Check valve: The resistance coefficient of the check valve is also relatively large, generally between 10 and 20.

In addition, there are other types of valves, such as throttle valves, regulating valves, etc., which also have different resistance coefficients. In general, there are several factors that must be considered when choosing the right valve, including the type of valve, the pressure of the piping system, the flow rate, etc.

This question is up to me, it takes a little time to type, so please be patient.

Ball valve: The resistance coefficient of ball valve is small, generally around the left. 2.

Butterfly valve: The resistance coefficient of butterfly valve is small, generally around. 3.

Globe valve: The resistance coefficient of globe valve is relatively large, generally between 5 and 10, so the pressure and flow situation of the piping system need to be carefully considered when choosing a globe valve. 4.

Check valve: The resistance coefficient of the check valve is also relatively large, generally between 10 and 20. In addition, there are other types of valves, such as throttle mill valves, regulating valves, etc., which also have different resistance coefficients.

In general, there are a number of factors that must be considered when choosing the right valve, including the type of valve, the pressure of the piping system, the flow rate, etc.

There are some other types of valves, and their specific resistance coefficients are as follows: 5Gate Valve:

The resistance coefficient of gate valves is relatively large, generally between 10 and 15. 6.Diaphragm valve:

The resistance coefficient of the diaphragm valve is relatively small, generally around the left. 7.The control valve is silver-rotten:

The resistance coefficient of the control valve is also relatively small, generally around the left. In general, the selection of the right valve must consider a number of factors, including the type of valve, the flow rate and pressure of the piping system, etc.

<> the resistance coefficient of common valves refers to the ratio of the pressure difference generated by the valve to the total length of the conduit at a certain flow rate. The greater the drag coefficient, the greater the resistance of the valve to the fluid, and the flow rate will be affected. The resistance coefficients of common valves are as follows:

1.Ball valve: The resistance coefficient is small, about butterfly valve:

The drag coefficient is smaller, generally around the left. 3.Shut-off valve:

The drag coefficient is large, usually between 5-10. 4.Gate Valve:

The drag coefficient is also relatively large, generally around 10. 5.Check Valve:

The drag coefficient is large, generally between 5-20. It should be noted that the above resistance coefficients are for reference only, and the actual value will also be affected by many factors, such as fluid density, viscosity, temperature, pressure, etc. Tips:

The drag coefficient of a valve is a very important concept in fluid mechanics, which determines the degree of influence of the valve on the flow of fluids. Therefore, the drag coefficient is one of the main parameters to consider when designing and selecting valves. In addition to the above-mentioned common valves, there are also different resistance coefficients for its types of valves, such as throttle valves, control valves, etc.

In addition, in practical applications, the coefficient of resistance can be changed by changing the structure of the valve or by using additional devices to optimize the fluid flow properties.

Summary. What are the characteristics.

Hello dear, the characteristics of the door are: 1. Small flow resistance. The medium channel inside the valve body is straight, and the medium flows in a straight line, and the flow resistance is small.

2. It is more labor-saving when opening and closing. This is compared to the shut-off valve, because the direction of movement of the ram is perpendicular to the direction of the medium flow, whether it is open or closed. 3. The height is large and the opening and closing time is long.

The opening and closing stroke of the ram is larger, and the lowering is carried out by the screw. 4. Water hammer is not easy to produce. The reason for this is the long closure time.

5. The medium can flow in any direction on both sides, which is easy to install. The gate valve passage is symmetrical on both sides. 6. The length of the structure (the distance between the two connected end faces of the shell) is small.

What kind of resistance does the resistance of the valve belong to.

What kind of resistance does the resistance of the valve belong to, the valve belongs to the local resistance, I hope it can help you smile. If my answer is helpful to you, please also give a thumbs up (in the lower left corner of the pin base for a loss of spring evaluation), look forward to your like, your efforts are very important to me, your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

What are the characteristics. What are the characteristics of your dear, the characteristics of the door are: 1. The resistance of the flow is small.

The medium channel inside the valve body is straight, and the medium flows in a straight line, and the flow resistance is small. 2. It is more labor-saving when opening and closing. Compared with the shut-off valve, because whether it is open or closed, the direction of movement of the ram is perpendicular to the direction of the medium flow reed.

3. The height is large and the opening and closing time is long. The opening and closing stroke of the ram is larger, and the lowering is carried out by the screw. 4. Water hammer is not easy to produce.

The reason for this is the long closure time. 5. The medium can flow in any direction on both sides, which is easy to install. The gate valve passage is symmetrical on both sides.

6. The length of the structure (the distance between the two connected end faces of the shell) is small. 7. The positive wheel of the sealing surface is easy to wear, which affects the service life. When opening and closing, the two sealing surfaces of the ram and the valve seat rub and slide against each other, and the medium pressure is required, I hope it can help you.