Gate valves, globe valves, ball valves, butterfly valves, check valves, seek answers from industry i

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.

People in the wild suggest that you take a look at the encyclopedia separately.

Take a look at the encyclopedia OK.

There are so many varieties, and their connection is that they are all valves.

Differences: There are many ways to distinguish them, such as whether there is no adjustment function, whether it can be hard sealed, whether the size of the shape is convenient for installation, etc.

Check valve: Its function is to prevent the backflow of the medium in the pipeline.

Gate valves can be made of a large diameter, and the ball valve is generally up to DN200, butterfly valves, globe valves have adjustment functions, but butterfly valves are small in size, fast in opening and closing, cheap in cost and different from globe valves, different working conditions are suitable for different valves

Hello, different working conditions require different valves. It is mainly a control component in the fluid transportation system, with the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Take a look at the profiles of each valve. Hope it helps.

It's really hard to say, there are too many varieties, and the valves produced by Shanghai Jiasong have won many awards, so you can go and see if you need to.

Different uses are different. This is not easy to introduce. It's best to go and get a sample and take a closer look.

Both valves are used for shut-off in the pipeline.

The characteristics of the gate valve are that the flow direction of the medium is not limited, the resistance is small, and the erosion of the sealing surface is very small when it is fully opened, but the opening height is generally high, and the sealing surface is easy to be damaged by friction, and it is difficult to maintain.

The globe valve is characterized by low opening resistance and low opening height, which is easy to maintain. However, the fluid resistance is large, the structure size is large, and the selection of DN greater than 200 is less, and the gate valve is generally selected.

Hope it helps!

Gate valves, globe valves, and ball valves all belong to the category of shut-off valves, and their function is to connect or cut off the rising medium in the pipeline.

Check valves, also known as check valves or check valves, are used to prevent the reverse flow of the medium in the old and slammed into the slip and stop pipeline.

Butterfly valves are the most common type of valve that closes the flow of media. Simple construction and material saving.

The check valve is used to prevent the backflow of the medium.

The globe valve is a plug-shaped disc with a plug-shaped opening and closing part of the globe valve, and the sealing surface is flat or conical, and the disc moves in a straight line along the center line of the fluid. The movement form of the valve stem has a lifting rod type (the valve stem is lifted, and the handwheel is not lifted), and there is also a lifting and rotating rod type (the handwheel and the valve stem rotate and lift together, and the nut is located on the valve body). The shut-off valve is only suitable for full open and full closing, and is not allowed to be adjusted and throttled.

Amic-Ding Zhiliang-q1608199153

Butterfly valve (English: butterfly valve) refers to a kind of valve with a shut-off part (disc or butterfly plate) as a disc, rotating around the valve shaft to achieve opening and closing, 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° when fully open to fully closed, and the butterfly valve and the butterfly rod itself do not have the ability to self-lock, so in order to position 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. The characteristics of the industrial butterfly valve can withstand high temperatures, the applicable pressure range is also high, the valve nominal diameter is large, the valve body is made of carbon steel, and the sealing ring of the valve plate is made of metal ring instead of rubber ring.

The large high-temperature butterfly valve is made of steel plate welding, which is mainly used for flue air ducts and gas pipelines of high-temperature medium.

The opening and closing parts rely on the flow and force of the medium to open or close by themselves, so as to prevent the medium from flowing backwards. Check valves belong to the automatic valve category, which are mainly used on pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.

The opening and closing parts of the stop valve (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 fluid. The movement form of the valve stem, (common name: dark rod), there is also a lifting rotary rod type, (common name:

An open rod) globe valve is a valve in which the shut-off (disc) moves along the centerline 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.

Therefore, this type of valve is ideal for shut-off or regulation as well as throttling.

The role of the check valve.

1.Range. This instruction sheet includes the nominal diameter DN15mm 600mm (1 2" 24") nominal pressure.

CLASS150 900) screw-open check valve connected by threaded end, flange end, butt weld end and socket weld end

Lifting check valve.

2.Use. This valve is used in pipes or devices to prevent the backflow of media.

The material of the valve is selected according to the medium.

Carbon steel valves are suitable for water, steam, oil and other media.

Stainless steel valves are suitable for corrosive media.

Applicable temperature: The applicable temperature of ordinary carbon steel valve is -29 +425

Alloy steel valves are suitable for temperature 550

The stainless steel valve is suitable for -196 +200 temperatures

3.Structure. The basic structure of the check valve is shown in Figure 1

The wearing parts gasket is made of PTFE or flexible graphite, which is reliably sealed.

4.How it works.

The check valve automatically opens and closes the disc by relying on the flow of the medium itself to prevent the medium from backflowing.

5.Storage, maintenance, installation and use.

The valve should be stored in a dry, ventilated room, and the valve passage should be blocked at both ends.

Valves that have been stored for a long time should be checked regularly to remove dirt. Special attention should be paid to the cleaning of the sealing surface to prevent damage to the sealing surface.

Before installation, carefully check whether the valve mark is consistent with the use requirements.

Before installation, the inner cavity and sealing surface of the valve should be inspected, and if there is dirt, it should be wiped clean with a cleaning cloth.

Before installation, it should be noted that the flow direction mark on the valve is consistent with the flow direction of the medium.

The lifting vertical flap check valve should be installed on the vertical pipeline, and the lifting horizontal flap check valve and swing check valve should be installed.

on horizontal pipes.

In use, attention should be paid to whether the valve has abnormal sound and vibration, and in order to prevent water hammer effect in the pipeline, attention should be paid to the pipeline medium.

Fluctuations in qualitative pressure.

The role of the butterfly valve.

1.Range. This statement includes a nominal diameter of DN50mm and 1600mm (2" 64") nominal pressure.

CLASS150 300) flange and clamp connections for manual, geared, electric and pneumatic manipulation.

as a butterfly valve. 2.Use.

It is mainly used to open or close the medium of pipelines and equipment, and is used for adjustment, interception and check-back.

The material of the valve is selected according to the medium.

Carbon steel valves are suitable for water, steam, oil and other media.

Stainless steel valves are suitable for corrosive media.

Cast iron valves are suitable for water and gas media.

The applicable temperature depends on the material of the seat.

PTFE (polytetrafluoroethylene) 130

Stainless steel + composite 425

Rubber 60

Cut-off valve: Cut-off valve, also known as closed-circuit valve and globe valve, is used to connect or cut off the medium in the pipeline. Cut-off valves include gate valves, globe valves, rotary valves, plug valves, ball valves, butterfly valves and diaphragm valves.

The function of the butterfly valve is to open or close the medium of pipelines and equipment, and to regulate and intercept the flow. The function of the check valve prevents the medium from backing up The function of the stop valve is cut off or adjusted, and the flow is throttled.

This question may have two meanings: First, what industry are these pipe fittings used in? The second is the use and use of globe valves, ball valves, and check valves.

First of all, these pipe fittings are used in pipeline engineering, that is, wherever gases, liquids, or gases and liquids need to be used as power. Therefore, it is needed in almost all industries (engineering), especially in chemical enterprises, water supply, and hydraulic systems.

The most important parameters of pipe fittings (valves) are the pressure, the nominal diameter of the pipeline, the medium used, the temperature, and the material of the spool and valve body. There are many types of valves, and the most commonly used ones are globe valves, gate valves, ball valves, ......As the name suggests, the check valve (many forms) is to prevent the fluid from reversing, such as the pump outlet needs to be installed to prevent the fluid from reversing when the pump stops, therefore, the check valve needs to be installed where the fluid is not allowed to flow back in the process. The globe valve is mainly used where the fluid needs to be cut off, it has good tightness (not easy to leak), but the resistance is large.

The ball valve, the valve core is a ball body, the structure is simple, the switch is convenient, but its adjustment and pressure resistance are poor, so it is often used on water pipes with small diameter. If you need to know more about it, please refer to the valve selection manual, if necessary, please provide QQ email to send you e-books.

Shut-off valves are widely used, but they have large head losses and are not easy to clean, so they are not suitable for easily clogged fluids or viscous fluids. The ball valve has a small pressure head loss and is suitable for more viscous fluids, but the practical application is also very wide, but it is slightly higher. As the name suggests, the check valve prevents the fluid from flowing backwards, allowing the fluid to be delivered in one direction, and if it is in the opposite direction, it is immediately shut off.

The globe valve is generally used at the water inlet of the pipe network, and the ball valve is generally used at the water outlet of the pipe network, which is convenient for switching.

Check valves are suitable for water supply pipe networks in high-rise buildings, pipe networks with certain chemical corrosive media, pipe networks with limited installation space, and sewage pipe networks.

Where there are pipes, there are these.

Gate valve: Features: The valve that uses the gate to lift and control the opening and closing, the flow direction remains unchanged when the fluid passes, so the water flow resistance is small and the tightness is poor.

Application: It should not be used on pipelines that need to be adjusted in size and opened and closed frequently. Widely used in hot and cold water piping systems; It is mainly used in some large-diameter pipes.

Butterfly valve: Features: simple structure and operation, fast opening and closing, with good fluid control characteristics.

Application: Suitable for installation on large diameter pipes.

Check Valve: Feature: One-way, suitable for cleaning media, not suitable for media with solid particles and viscosity.

Application: Lifting check valve can only be used for horizontal pipes, swing check valve for vertical and horizontal pipes.

There are several ways to classify valves:

1. Classification according to function: such as globe valve, check valve, safety valve, pressure reducing valve, ---etc. 2. Classification according to the form of action structure: such as gate valve, butterfly valve, ball valve, diaphragm valve--- and other gate valves --- similar to the lifting action of the gate to open and close, butterfly valve --- action like butterfly wings to rotate around the shaft to open and close the check valve--- also known as check valve, check valve, the valve can only let gas or liquid flow in one direction.