Is it better to use a gate valve or a ball valve on the tubing?

Ball valves are generally used on oil pipes, and gate valves are generally used in gas paths or pipelines with high pressure.

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 selection of valves on the oil circuit is related to the diameter of the oil pipeline, the gate valve should be used for large-diameter valves, and the ball valve or other types of valves should be selected for small-diameter valves according to the installation position and environment.

It is better to choose ball valve for household water pipes. Because it is a ball valve, it is not easy to be damaged and rust-resistant. The material used is copper ball valve.

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

And the ball valve is just the place where the handle is occupied, which saves a lot of space than the gate valve.

Ball valves.

<> There are two types of globe valves commonly used on the stuffy tap water pipelines in the nuclear section of the household: ball valve and gate valve.

The difference between ball valve and gate valve mainly lies in the structure, material and use method.

Structure: The ball valve is composed of a ball, a valve seat and a handle, and the ball can be rotated 90 degrees to control the water flow during the valve opening and closing process; The gate valve is composed of a gate, a valve body, and a thread, and the gate plate controls the water flow by sliding up and down.

Material: The material of ball valve and gate valve has its own advantages and disadvantages, in general, the sealing performance and durability of the ball valve are better, and the material is commonly used brass, stainless steel, etc.; Due to the gate valve structure, the sealing performance may be slightly inferior to that of the ball valve, but its structure is simpler than that of the ball valve, and the materials are usually gray cast iron, cast steel, etc.

How to use: The use of the ball valve is relatively simple, you only need to rotate the handle to control the water flow, and the switching speed is fast; The switch of the gate valve needs to slide the gate up and down, and the switch speed is relatively slow.

Therefore, the selection of valves on the tap water pipes for home bending should be selected according to the actual needs and use environment. Generally speaking, the ball valve has good sealing performance and durability, and is more suitable for occasions that require frequent opening and closing; The gate valve is more suitable for occasions that need to shut down the water flow for a long time, such as water shutdown maintenance.

Summary. Hello dear, the gate valve is better, the advantages of the gate valve: 1. The flow resistance is small, the medium channel inside the valve body is straight, the medium flows in a straight line, and the flow resistance is small.

2. It is more labor-saving when opening and closing, which is compared with the globe valve, because whether it is open or closed, the direction of movement of the ram is perpendicular to the direction of medium flow. 3. The height is large, the opening and closing time is long, the opening and closing stroke of the ram is large, and the lifting is carried out through the screw. 4. The phenomenon of water hammer is not easy to occur, because of the long closing time.

5. The medium can flow in any direction on both sides, which is easy to install, and the two sides of the gate valve channel are symmetrical.

Hello dear, the gate valve is better, the advantages of the gate valve: 1. The flow resistance is small, the medium channel inside the valve body is straight, the medium flows in a straight line, and the flow resistance is small. 2. It is more labor-saving when opening and closing, which is compared with the suffocation ratio of the globe valve, because whether it is open or closed, the direction of the ram movement is perpendicular to the direction of the medium flow.

3. The height is large, the opening and closing time is long, the opening and closing stroke of the ram is large, and the lifting is carried out through the screw. 4. The water hammer phenomenon is not easy to produce a bright mask, because of the long closing time. 5. The medium can flow in any direction on both sides, which is easy to install, and the two sides of the gate valve channel are symmetrical.

Gate valve and ball valve are two different valves, the use is also different, the advantages of ball valve: 1, with the lowest flow resistance (actually 0); 2. Because it will not get stuck when working (when there is no lubricant), it can be reliably used in corrosive media and low boiling point liquids; 3. In a large range of pressure and temperature, it can achieve complete sealing; 4. It can realize rapid opening and closing, and the opening and closing time of some structures is only to ensure that the rubber can be used in the automation system of the test bench. When the valve is opened and closed quickly, there is no impact in operation; 5. The spherical closing part can be automatically positioned at the boundary position; 6. The working medium is sealed on both sides; 7. When fully open and fully closed, the sealing surface next to the ball and the valve seat is isolated from the medium, so the medium passing through the valve at high speed will not cause the erosion of the sealing surface;

Ball valve is good. Ball valve is mostly used in industrial gas valves, and corrosive liquids, ball valve structure is tight, good flow interception, large diameter and large flow rate are good, ball valve is only suitable for pipe diameter within 50 mm, easy to use, ball valve is more refined, and the full bore ball service valve flow resistance is basically zero, and it has two sealing surfaces, the use of good plastic, strong sealing, can achieve complete sealing, zero leakage effect.

The ball valve only needs to rotate 90 degrees from full open to full closing, which has the advantages of fast opening and closing, convenient remote control, simple maintenance of ball valve, easy disassembly, easy replacement, and the use range of ball valve is many, the diameter can be from a few millimeters to several meters, the pressure can reach more than 32MPa, and it is suitable for being equipped with actuators.

Ball valve function classification:

1. Bypass valve.

The ball valve is generally opened by static water, so the bypass valve is flattened first, that is, both sides are filled with water.

2. an air valve.

When filling with water, the air is removed and the float closes the valve by itself, and when the water is drained, the air is replenished, and the float descends by itself.

3. Pressure relief valve.

When opening and closing the valve, remove the pressure water between the flap and the sealing cover, so as to avoid wearing the sealing cover.

4. Blowdown valve.

Discharge sewage from the inner and lower parts of the spherical shell. <>

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 long-term contact with the valve ball 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 be tightened, resulting in a large compressive 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-turn, 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. Since the compressive force of the valve plate on the valve seat is large, it is necessary to overcome this large friction force and require a large torque, so the actuator is equipped with a large amount.

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 to ball valves.

7 Maintenance Generally, no maintenance is required, 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.