The difference between flange gate valve and ordinary gate valve, the difference between butterfly v

Flange gate valve: English name; The opening and closing parts of the Flange Gate Valve are rams, the direction of movement of the ram is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed, and cannot be adjusted and throttled. The ram has two sealing surfaces, and the most commonly used mode gate valve has two sealing surfaces forming a wedge, and the wedge angle varies with the valve parameters, usually 50, and 2°52 when the medium temperature is not high'

The gate plate of the wedge gate valve can be made into a whole, which is called a rigid gate; It can also be made into a ram that can produce a slight amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle in the processing process, which is called the elastic ram.

Ordinary gate valve: mainly used to connect or cut off the medium in the pipeline, not suitable for adjusting the flow rate of the medium. Gate valves are suitable for a wide range of pressure, temperature and diameter, especially for medium and large diameter pipelines.

The main difference: the difference between flanged gate valve and ordinary gate valve is that flanged gate valve is durable, easy to install, but the price is higher, and it is generally used for large pipelines. Ordinary gate valves are mostly used in places with small diameter and easy to replace.

The difference between flanged gate valve and ordinary gate valve is that flanged gate valve is durable and easy to install, but the price is a bit high, and it is generally used for large pipelines. Ordinary ones are also available, such as small caliber points, easy to replace places.

Generally, the diameter of 50 or more is flanged, inspection wells, main pipelines, trenches, etcFlange gate valves must be used, which are easy to operate and easy to replace.

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.

Butterfly valves close and open quickly, while gate valves adjust slowly and require several rotations to close or open.

Butterfly valve (left) and gate valve (right).

Gate valve is one of the most common opening and closing valves, which uses a gate (i.e., an opening and closing piece, in which the opening and closing part is called a gate or gate, and the gate seat is called a gate seat) to connect (fully open) or cut off (fully closed) the medium in the pipeline. It is not allowed to be used as a shut-off, and the ram should be avoided in use, because the erosion of the high-speed flowing medium will accelerate the damage of the sealing surface. The gate plate is used as a lifting motion on the one side perpendicular to the center line of the gate seat channel, and the medium in the pipeline is cut off like a gate, so it is called a gate valve.

The butterfly valve refers to a kind of valve that rotates around the valve shaft to open and close the closing part (disc or butterfly plate) as a disc, which is mainly used for cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting. The butterfly valve is usually less than 90° from full open to full closed, and the butterfly valve and the butterfly rod itself have no self-locking ability, so for the positioning of the butterfly plate, a worm gear reducer should be installed on the valve stem.

The use of worm gear reducer can not only make the butterfly plate have the ability to lock itself, make the butterfly plate stop in any position, but also improve the operation performance of the valve.

1.Simple structure: Shanghai flange gate valve has a simple structure and is easy to maintain and repair.

2.Reliable sealing: The gate plate and valve seat are sealed with metal-to-metal, which is reliable in sealing and is not easy to leak.

3.Easy to operate: The valve only needs to rotate the stem to open and close the valve, which is easy to operate.

4.Good corrosion resistance: the valve body, bonnet, valve stem, ram and other parts are made of stainless steel.

5.Wide range of application: Shanghai flange gate valve is suitable for all kinds of fluid dielectric, including corrosive media.

Summary. Control valves and gate valves are two different types of valves, the main difference of which is their scope of use and function. A control valve is a type of valve used to control parameters such as flow, pressure, and temperature, and is commonly used in industrial automation control systems.

It can achieve precise control of the fluid by adjusting the opening of the valve according to the signal of the control system. Control valves typically have high precision and regulation performance and can be adapted to different fluid process requirements. A gate valve is a valve used to cut off fluids, and its main function is to control the on-off and flow direction of fluids.

It is typically used for switching and regulating in pipelines and is not suitable for fluid processes that require precise control, nor for high-velocity flows of liquids or gases.

Control valves and gate valves are two different types of valves, the main difference of which is their scope of use and function. A control valve is a type of valve used to control parameters such as flow, pressure, and temperature, and is commonly used in industrial automation control systems. According to the signal of the control system, it can adjust the opening of the valve to achieve precise control of the fluid.

Control valves typically have high precision and regulation performance and can be adapted to different fluid process requirements. A gate valve is a valve used to cut off fluids, and its main function is to control the on-off and flow direction of fluids. It is typically used for switching and regulating in pipelines and is not suitable for fluid processes that require precise control, nor for high-velocity muffled flow of liquids or gases.

I'm sorry I don't understand, but can you elaborate on that?

The main difference is in the scope of its use and capabilities. A control valve is a type of valve used to control parameters such as flow, pressure, and temperature, and is commonly used in industrial automation control systems. It can achieve precise control of the fluid by adjusting the opening of the valve according to the signal of the control system.

Control valves typically have high precision and regulation performance and can be adapted to different fluid process requirements. A gate valve is a valve used to cut off fluids, and its main function is to control the on-off and flow direction of fluids. It is commonly used for switching and regulating in pipelines, and is not suitable for fluid processes that require precise control, nor is it suitable for high-speed flow of liquids or gases.

To sum up, there are obvious differences between control valves and gate valves in terms of use and function, and it is necessary to select the appropriate valve type according to the specific situation.

Summary. A control valve is a device that regulates the flow rate and can control the magnitude or dynamic change of the flow rate. A gate valve is a device used to close or open the flow of media, which can be controlled by a ram or other device.

In general, control valves are mainly used to regulate the flow rate, while gate valves are used to open or close the flow rate.

A control valve is a device that regulates the flow rate, and can only control the size or dynamic changes of the flow rate. A gate valve is a device used to close or open the flow of media and can be controlled by a ram or other device. In general, control valves are mainly used to regulate the flow rate, while gate valves are used to open or close the flow rate.

Can you add, I don't quite understand it.

A control valve is a device that regulates the flow rate, and can only control the size or dynamic changes of the flow rate. A gate valve is a device used to close or open the flow of media and can be controlled by a ram or other device. In general, control valves are mainly used to regulate the flow rate, while gate valves are used to open or close the flow rate.

1 spool ball valve spool for the ball, because of its fixed ball structure, so that the valve in the high pressure situation, especially in the closed state, the valve ball is fixed, the upper stem and the lower branch decompose part of the pressure from the medium, so the valve ball does not offset downstream, so the downstream valve seat is relatively small, so the valve in the action to overcome the friction is small, the valve seat wear is small, the service life of the valve is long, especially for the valve often action of the valve, this structure is more suitable.

The spool of a gate valve is a wedge-shaped disc or this parallel disc. Its lower part has no pivot. Therefore, when the valve is applied under high pressure and in the closed state, the valve plate bears a great pressure from the medium, and because of its flat valve plate structure, all the medium pressure acts on the valve plate at the same time, and the valve plate will be pressed to the downstream valve seat (at the same time, the excessive pressure acts on the vertical plane of the valve plate, which will make the valve plate whether it is a wedge or a parallel double gate, there will be a certain deformation), then the valve needs to overcome great friction when it is opened, and the wear of the valve seat prints the life of this valve is short.

2 Seat The ball valve has a spring inside the seat, and the sealing design of the seat makes it difficult for the residue in the medium to enter the seat. The valve seat is in contact with the valve ball for a long time under the action of the spring, so when the valve is moving, the valve seat has a certain scraper effect, which can scrape off the slag attached to the valve core after long-term operation, so the sealing performance of the valve can be guaranteed for a long time. Especially in the application of high temperature and high pressure, because the material of the valve seat, valve body and valve ball is selected with the same coefficient of thermal expansion when selecting, as well as the valve seat with spring structure, when the valve is closed, the huge temperature difference and the drop in temperature will not affect the action of the valve, and the valve will not produce the phenomenon of locking.

The seat of the gate valve is very narrow, and in high temperature applications, when the valve is closed, the temperature drops because the medium does not flow, so the seat will tighten, resulting in a large compression force on the valve plate. When the valve is opened again, a large torque is required to overcome this compressive force, which will cause great damage to the valve seat and affect the life of the valve seat. This affects the service life of the valve.

In addition, due to the weight of the ram itself when the valve is closed, it will bring a great impact force to the valve and make a lot of noise.

3 stroke The stroke of the ball valve is quarter-stroke, so it has a small installation space and low height.

The stroke of the gate valve is straight, so the installation space is large and the height is high.

4 Actuators.

Due to the fixed ball design, the torque value of opening and closing is small, so the actuator is correspondingly small. Due to the large compressive force of the valve plate on the valve seat, it is necessary to overcome this large friction force, and the actuator is equipped with a large torque.

5. The flow direction of the medium is double flow, and there is no installation flow direction problem on site. Generally, it is a single flow.

6. Long service life, short compared with ball valves.

7 Maintenance Generally, there is no need for maintenance, especially the valve ball and valve seat, which do not need to be replaced within 5 years due to small wear.

Due to the high wear and tear of the seat, regular maintenance is required.