What is the difference between a marine ball valve and an ordinary ball valve?

The main thing is to meet the marine conditions. As far as the ball valve itself is concerned, there is no difference between the marine ball valve and the ordinary ball valve in terms of structure, mainly because the material can meet the offshore environment. For example, anti-salt spray, anti-seawater, etc.

In terms of the control method of ball valves, for large bore ball valves, there may be additional devices such as "local remote control". This part of the add-on must also meet the operational requirements of the offshore environment.

For details, please refer to the Ship Construction Code.

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.

The difference between ball valve and angle valve is: the fundamental difference between angle valve and ball valve is that the outlet of the angle valve is at a right angle of 90 degrees to the inlet.

Angle valves are mainly used on heating pipes. This is usually a connection point between the hose that is embedded in the wall and connects the faucet above to the wall. For example, the faucet in the bathroom generally has hot and cold water alternately, and two hoses will be pulled out from under the faucet, and then connected to the wall, and the interface embedded in the wall is the angle valve.

Because the heating pipe is shaped at a 90-degree angle at the corner, and the ball valve is straight-through.

Introduction to ball valves and angle valves

Ball valves are called because of the ball-shaped shape of the ball, which is mainly designed for the throttling effect of tightly closing, frequent opening and closing and when the fluid needs to control the flow rate.

Its most important feature is effective throttling, so that the wire drawing phenomenon is minimized and thus reduce the immersion (washing) corrosion of the valve and the valve seat, but because the valve seat is parallel to the streamline, the flow direction of the fluid flows through this type of valve seat changes, which will produce turbulence in the valve, as well as the decline of the reducing force, and is only suitable for the loss of head caused by the pressure drop, which can be used.

Angle valves are angle globe valves.

Angle valves are similar to ball valves, and their structure and characteristics are modified from ball valves. The difference with the ball valve is that the outlet of the angle valve is at a right angle of 90 degrees to the inlet. Angle valves are also called triangle valves, angle valves, and angle valves.

This is because the pipe is shaped at an angle of 90 degrees at the angle valve, so it is called an angle valve, an angle valve, and a corner water valve.

1. The opening and closing parts of all ball valves are a round ball with holes, and the ball core is rotated around the axis of the valve stem by rotating 0-90° back and forth, so as to achieve the purpose of opening or closing the valve. The ball valve has many functions, and is generally used in the pipeline to cut off or adjust the medium, among which the three-way ball valve can flexibly cut off, distribute and change the flow direction of the medium. The sealing surface of the ball valve is usually in a closed state with the spherical surface, so it is not easy to be eroded by the medium, easy to operate, simple and compact structure, and can be used in working conditions with water, natural gas, acid, solvent, etc.

Ball valves can generally be divided into three categories: floating ball valves, fixed ball valves, and elastic ball valves. According to the different sealing performance, it is divided into hard seal ball valve and soft seal ball valve, among which the soft seal ball valve has good sealing performance and can achieve zero leakage, which is generally used in the normal temperature and pressure pipeline with corrosive medium, and the hard seal ball valve can not only be used for normal temperature and pressure, but also can be used for low temperature and low pressure and high temperature and high pressure pipelines.

Ball valve use: mainly used for shut-off; Close Start; Medium: steam, water, oil; chemical solutions;

Ball valves are divided into two types of sealing: soft seal and hard seal;

There are three types of connections: flange; threaded fasteners; Weld.

Operating temperature: -196 to 350 degrees.

Mode of operation: manual; Pneumatic; Electric; Hydraulic.

Ball valves are widely used in petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries, and occupy a pivotal position in the national economy. It has an action of 90 degrees of rotation, and the body is a sphere, with circular through-holes or channels through its axis.

The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a small torque to close tightly. Ball valves are most suitable for on/off and shut-off valves.

Ball valves and gate valves are two different types of valves. They differ from each other in the following ways:

Ball valves and gate valves.

First, the spool structure.

The valve core of the ball valve is a ball, because of the structure of its fixed ball, the valve ball is fixed under the condition of high pressure, especially in the closed state, and the upper valve stem and the lower branch decompose part of the pressure from the medium, so the valve ball does not offset downstream, so the pressure on the downstream valve seat is smaller than the ruler, so the friction that the valve overcomes when it is moving.

If it is small, the wear of the valve seat is small, and the service life of the valve is long, especially for the valve that acts frequently, this structure is more suitable.

The spool of a gate valve is either a wedge-shaped disc or a parallel disc. Its lower part has no support for the trapped residual shaft. 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, then the valve plate will be pressed to the downstream valve seat (at the same time, excessive pressure acts on the vertical plane of the valve plate, which will make the valve plate whether it is wedge-shaped or 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.

Second, the seat structure.

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 long-term contact with the valve ball under the action of the spring, and when the valve is moving, the valve seat has a certain scraper effect of sock rolling, which can scrape off the slag attached to the valve core after long-term operation, and can ensure the sealing performance of the valve for a long time. Especially in high-temperature and high-pressure applications, the material of the seat, valve body, and valve ball is selected with the same coefficient of thermal expansion.

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.

Loud noise. 3. Itinerary.

The ball valve has an angular stroke and therefore 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. Executive Agencies.

Due to the fixed ball design, the opening and closing torque of the ball valve is small, so the actuator is correspondingly small. Gate valves have a large compression force on the valve seat due to the large compression force of the valve plate, so it takes a lot of torque to overcome this large friction force, and the actuator is equipped with a large force.

1. The working principle of one-piece ball valve and two-piece ball valve is different: the working principle of one-piece ball valve is the mechanical pressure effect of the valve stem; The working principle of the two-piece ball valve is to make the valve open or occluded by rotating the valve.

2. The valve body of one-piece ball valve and two-piece ball valve is different: the one-piece type is fixed by a plug head; The two-piece ball valve is fixed by two pieces of the valve body clamping the ball, and the maintenance is relatively complicated, and the tightness of the bolt in the middle is very critical.

3. The closing parts of one-piece ball valves and two-piece ball valves are different: the closing parts of one-piece ball valves are a ball, and the ball rotates around the center line of the collapsed skin valve body to achieve opening and closing; Two-piece ball valves, on the other hand, have no special requirements.

There is a big difference between the structure and working principle of the ball valve and the gate valve, they are not the same.

V-Ball Valve. 1.Structure: The main component of the ball valve is the ball, which controls the flow or truncation of the fluid by rotating the ball; The gate valve, on the other hand, controls the flow or truncation of the fluid by moving the gate up and down.

2.Working principle: The ball valve changes the position of the bore in the ball by rotating the ball, so as to realize the flow or truncation of the fluid.

Ball valves are usually simple to operate and can be fully opened or closed quickly. Gate valves, on the other hand, control the flow or truncation of fluids through a ram that moves up and down, are relatively slow to operate and usually require multiple operating steps to achieve full opening or full closing.

V-Ball Valve. 3.Sealing performance: Ball valves usually have better sealing performance, because the sealing surface between the ball and the valve seat can achieve better sealing effect. On the other hand, gate valves may cause wear and leakage of the sealing surface due to the up and down movement of the ram.

4.Scope of application: Ball valves are usually suitable for fluid control under high pressure, high temperature, high flow rate and other conditions, and are widely used in petroleum, chemical industry, electric power, metallurgy and other fields.

Gate valves are usually suitable for fluid control under low pressure, low temperature, low flow rate and other conditions, and are widely used in urban water supply, sewage treatment, air conditioning, fire protection and other fields.

Therefore, there are obvious differences between ball valves and gate valves in terms of structure, working principle, sealing performance and scope of application, and the appropriate valve type should be selected according to the specific application requirements and working environment.

Ball valves, gate valves, are copied.

It belongs to the shut-off valve bai door, which is also divided into a lot of small categories of du in these two types of valves, and the difference in the performance of the use of zhi is very large.

Advantages of ball valves: good sealing performance, small switching torque, long life, especially for the installation space is limited, it is very easy to use.

The advantages of gate valves: small medium flow resistance, not easy to produce water hammer phenomenon (long switching time), simple structure.

Easy to maintain.

1.The angles are different. The inlet and outlet angles of the valve are 90 degrees, while the inlet and outlet of the ball valve are straight-through.

2.Different occasions of use. Angle valves are mainly used for heating pipes and connecting hoses. Ball valves are mainly used for heating and are used to connect hot and cold pipes.

3.Performance is different. Angle valves can change the direction of flow, and their resistance and throttling effect is greater than that of ball valves.

4.The features are different. Ball valves can't change the direction of water flow, angle valves can.

5.The flow is not the same either. Comparatively speaking, the flow resistance of angle valves is slightly greater than that of ball valves, mainly because of their different structures, so the flow rate of ball valves is slightly larger at the same diameter.

Learn about angle valves, ball valves.

Angle valve, that is, angle stop valve, also known as triangle valve, angle valve, because the angle valve at the pipeline is at an angle of 90 degrees. The angular flow path is simple and the flow resistance is small, which is suitable for high viscosity, suspended solids and granular fluids. The body of the angle valve has three ports:

Water inlet, water control and outlet, so it is called a triangle valve.

The angle valve is an angle globe valve, similar to a ball valve, and its structure and characteristics are modified by the ball valve. Angle valves are also called triangle valves, angle valves, and angle water valves. Triangle valves are available in both hot and cold (distinguished by blue and red signs).

Most manufacturers are made of the same material. Hot and cold signs are mainly used to distinguish which is hot and which is cold.