Hot oil is suitable for either a shut off valve or a gate valve

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.

See what you think of? Shut down? Regulate?

1. The structure is different.

The structure of the gate valve and the globe valve is different, and the structure of the globe valve is.

The handwheel followed. The valve stems rotate together to make an opening and closing motion. The gate valve structure is a rotating handwheel, and the valve stem does a lifting movement. That.

The flow rate is different, the gate valve needs to be fully open or fully closed, and the shut-off valve is not. Globe valves have flow direction requirements, while gate valves do not have inlet and outlet requirements.

2. The sealing is different.

The length of the gate valve is shorter than that of the globe valve, and the height is higher than that of the globe valve.

Attention should be paid to the height of the installation. Gate valves can be relied on.

The medium pressure is tightly closed with the sealing surface, so as to achieve the effect of no leakage. When opening and closing, the spool and.

The valve seat sealing surfaces are always in contact and rubbing against each other, so the sealing surfaces are prone to wear and tear, and the gate valve is close to closing, before and after the pipe.

The pressure difference is large, which makes the wear of the sealing surface even more serious.

Expansion: Selection of gate valves and shut-off valves.

The globe valve is simpler in structure, better in sealing, and easier to manufacture and maintain than the gate valve; The disadvantage is that the fluid resistance force is large, and the opening and closing force is large. Gate valves and globe valves are fully open and fully closed.

Valves, suitable for cut-off, not for use.

Control valve use. Pay attention to the valve when selecting during the application.

Peculiarity. Small pipelines and those requiring good sealing performance generally choose globe valves; in the steam system and large-bore pipes.

In the middle of the road, due to.

Fluid resistance. Small, suitable for the use of gate valves.

The gate valve is a gate plate with opening and closing parts, and the direction of movement of the gate plate is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed. The globe valve, also known as the shut-off valve, is a forced sealing valve, and when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. The main differences between the two are:

1. The structure is different.

The structure of the globe valve is that the handwheel rotates with the valve stem to make the opening and closing movement, while the gate valve structure is to rotate the handwheel and the valve stem to do the lifting movement.

2.The flow is different.

Gate valves are required to be fully open or closed, and shut-off valves are not required.

3. Different flow direction requirements.

Globe valves have flow direction requirements, while gate valves do not have inlet and outlet requirements.

4. The sealing is different.

The sealing surface of the gate valve is a small trapezoidal side, and the valve core falls off, which is equivalent to the valve closing. The gate valve is sealed by the side of the core gate, the sealing effect is not as good as the globe valve, and the valve core will not be closed when the valve station is closed like the globe valve.

Marking valve professionals will answer for you: globe valve is a very widely used valve, due to the small friction between the sealing surfaces in the opening and closing process, durable, low opening height, simple production, convenient maintenance, not only suitable for low pressure, but also suitable for high pressure. Gate valve is one of the common valves, the opening and closing parts of the gate valve are called the gate, the gate is moving up and down, perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed, can not be used for adjustment and throttling.

Compared with gate valves, the advantages of globe valves are simple structure, good sealing performance, and convenient manufacturing and maintenance; The disadvantage is that the liquid resistance is high, and the opening and closing forces are high. Gate valves and globe valves belong to fully open and fully closed valves, which are used for shut-off or connecting the medium, and should not be used as regulating valves.

The range of applications for globe and gate valves is determined by their characteristics. In smaller channels, when good shut-off sealing is required, shut-off valves are mostly used, and gate valves are used in steam pipelines and large-diameter water supply pipelines because the fluid resistance is generally small.

Under the condition that the pipe diameter and pressure range are the same, and they are all flanged (or threaded) connections, the gate valve and the globe valve can theoretically be used as shut-off valves interchangeably.

The opening and closing parts of the gate valve are the gate plate, the direction of movement of the gate plate is perpendicular to the fluid direction, and the gate valve can only be fully opened and closed.

It cannot be adjusted and throttled.

The opening and closing parts of the globe valve are plug-shaped discs, the sealing surface is flat or conical, and the disc moves in a straight line along the center line of the valve seat. Depending on this form of disc movement, the change in the seat port is proportional to the disc stroke. This type of valve is very suitable for regulating the flow rate because the stem opening or closing stroke is relatively short, and because it has a very reliable shut-off function, and because the change of the seat port is proportional to the stroke of the disc.

As a result, this type of shut-off valve valve is ideal for shut-off or regulation and throttling.

The spool of the gate valve on the structure is a gate plate, which is snapped down to the front and rear valve seats and sealed; Globe valves have a spherical, taper, and flat spool that is pressed down onto the seat and sealed. Functionally, the globe valve is generally used for pressure and flow control, and the gate valve is used for isolation.

Gate valves for steam are better than globe valves, and the structure is determined.

Looking at the sample, there is a bend in the middle of the shut-off valve, and if the steam pipeline is overhauled in winter and the water is not released in time, the water will be stored, resulting in freezing and damage to the valve.

Therefore, it is better to use gate valves for steam pipelines, and shut-off valves for other pipelines, except for some special valves such as oxygen.

I remember that the water pipe is usually a ball valve, and I haven't seen a gate valve very much. I don't know much.

When the pipeline is often fully open or fully closed, a gate valve can be used, and when the pipeline needs to be half-open or half-closed, it is recommended to use a shut-off valve.

There are many gate valves used on the waterway, and if you have to choose one of the two in the vapor phase, it is recommended to use the globe valve, which is related to this sealing form.

According to the conventional selection, there are more globe valves on steam pipelines, and more gate valves are used on water pipelines.

However, it is not only the shut-off valve for the steam pipe and the gate valve for the water pipe, depending on the specific requirements.

The gate valve has the following advantages: low fluid resistance, small brushing and erosion of the sealing surface by the medium. Less effort to open and close.

The flow direction of the medium is not restricted, and there is no turbulence or pressure reduction. The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide. The disadvantages of gate valves are as follows:

It is easy to cause erosion and abrasion between the sealing surfaces, and it is difficult to repair. The overall size is large, and a certain amount of space is required for opening, and the opening and closing time is long. The structure is more complex.

Globe valve advantages:

1. The structure is simple, and the manufacturing and maintenance are relatively convenient. 2. The working stroke is small and the opening and closing time is short. 3. Good sealing, small friction between sealing surfaces, and long service life.

4. The structure of the globe valve body is straight-through, DC and right-angle. Straight-through is the most common structure, but its fluid has the most resistance. The direct flow fluid has less resistance and is mostly used for fluids containing solid particles or high viscosity.

The right-angle valve body is mostly forged, which is suitable for shut-off valves with small passage and high pressure. Stainless steel globe valve.

Globe valve disadvantages:

1. The fluid resistance is large, and the force required for opening and closing is large. 2. It is not suitable for media with particles, large viscosity and easy coking. 3. Poor adjustment performance.

4. The types of globe valves are divided into external thread type and internal thread type according to the position of the stem thread. According to the flow direction of the medium, there are straight-through type, DC type and angular type. Globe valves are divided into sealing forms, including packing seal globe valves and bellows seal globe valves.

5. The bellows seal globe valve adopts the design of bellows seal, which completely eliminates the shortcomings of fast aging and easy leakage of ordinary valve stem packing seal, which not only improves the use of energy efficiency, increases the safety of production equipment, reduces maintenance costs and frequent maintenance, but also provides a clean and safe working environment.

Therefore, the globe valve and gate valve have their own advantages and disadvantages, and they should be placed in the specific working conditions to see which valve is suitable.

Hello answer According to the information you provided, I found for you, first of all, their structure is different, the gate valve can rely on the medium pressure to tightly close the sealing surface, so as to achieve the effect of no leakage. When the valve core and the sealing surface of the valve seat are always in contact and rub against each other, the sealing surface is easy to wear, and when the gate valve is close to closing, the pressure difference between the front and rear of the pipeline is very large, which makes the wear of the sealing surface more serious. The second is that the working principle is also different, when the globe valve is opened and closed, it is a rising valve stem type, that is to say, the handwheel is rotated, and the handwheel will rotate and lift with the valve stem.

The gate valve is a rotating handwheel, so that the valve stem does a lifting movement, and the position of the handwheel itself remains unchanged.

Flow rates vary, and gate valves require full open or full closing, while shut-off valves do not. The globe valve has specified inlet and outlet directions, and the gate valve has no inlet and outlet direction requirements. In addition, the gate valve only has two states of full opening or fully closing, and the stroke of the gate opening and closing is very large, and the opening and closing time is long.

The movement stroke of the valve plate of the globe valve is much smaller, and the valve plate of the globe valve can be stopped in a certain place during the movement for flow regulation. The gate valve can only be used for truncation and has no other functions.

Due to the different applications of industrial and mining industries, it is difficult to directly explain which one is better. The range of applications for globe and gate valves is determined by their characteristics. Such as:

In smaller channels, when good shut-off tightness is required, shut-off valves are mostly used; In steam pipelines and large-diameter water supply pipelines, gate valves are used because the fluid resistance is generally small.

The role is different, how to judge this

A gate valve is a valve in which the shut-off (ram) moves in the vertical direction along the centerline of the channel. Gate valves are mainly used for shut-off in pipelines.

Gate valve is a kind of valve that is widely used, the shut-off device with a general diameter of DN 50mm is selected from it, and sometimes the shut-off device with a small diameter is also used as a gate valve, and the gate valve has the following advantages:

Low fluid resistance.

The external force required for opening and closing is small.

There is no restriction on the flow direction of the media.

When fully opened, the erosion of the sealing surface by the working medium is less than that of the shut-off valve.

The body shape is relatively simple, and the casting process is better.

Gate valves also have shortcomings:

Large dimensions and opening heights. The installation requires a large amount of space.

In the process of opening and closing, there is relative friction between the sealing surfaces, which is easy to cause abrasions.

Gate valves generally have two sealing faces, which adds some difficulties to processing, grinding and maintenance.

The globe valve can intercept and adjust the flow rate, occupies a small area, is small in size, and is generally used in situations less than the nominal diameter DN50.

Both can be turned off, and the flow can be adjusted in situations where the linearity of the flow is not high.

It's just that the shut-off valve has a large flow resistance due to its structural characteristics, so the gate valve is used more where there is a requirement for throttling.

In addition, whether the globe valve is installed in the front or reverse, there is always a very laborious opening and closing process, so it cannot be made very large, or it is not easy to open and close.

In addition, the globe valve has the characteristics of good one-way sealing effect, so it is also useful in the occasion of preventing the backflow of working fluids.

If the above factors are not taken into account, the two can be used interchangeably.

Gate valves are used in relatively large systems to close the gate system; The globe valve is used in a relatively small system, and plays a role in regulating the flow rate of the system, and cannot be closed.

Zhejiang Weiduli valve manufacturing ****.

The company has passed API, AZ, ISO9001 certification.

Both are a type of partition valve on the pipeline, and both have their own advantages.

The opening and closing parts of the gate valve are rams, and the valves that are driven by the valve stem to do the lifting movement of the valve plate are called gate valves. Advantages and disadvantages of gate valves: the advantage is that the fluid flow resistance is small; The torque required for Qi Jing Xiang to close is small; The flow of media is not restricted; There is no water hammer phenomenon in opening and closing; The shape structure is relatively simple, and the manufacturing process is good.

The disadvantage is that the overall size and installation height are large; In the process of opening and closing, there is relative friction on the sealing surface, and the wear is large.

The opening and closing parts of the globe valve are disc valves, which are driven by the valve stem and do lifting movement along the axis of the valve seat is called the globe valve. Advantages and disadvantages: the advantages are simple structure, small installation size, good sealing performance, and easy maintenance of the cover of Mizen liquid; The disadvantage is that the medium has a large flow resistance and the direction is limited.

The main difference is the direction of power and medium of the valve opening and closing.

The direction of movement of the opening and closing parts of the gate valve is perpendicular to the flow direction of the medium, and the shut-off valve is parallel.

The globe valve has an installation direction, mainly according to the arrow of the valve body, and if there is no indication, it must be installed according to the low in and high out. However, there are some special cases where it can be reversed. The gate valve is the same on both sides.