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Stainless steel 201 304 one-piece ball valve threaded ball valve 1pc internal threaded thread manual valve

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Stainless steel 201 304 one-piece ball valve threaded ball valve 1pc internal threaded thread manual valve

Good sealing performance, simple structure, small size, light weight, small flow resistance, etc. Ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. Ball valve is a new type of valve widely used in recent years.

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Stainless steel 201 304 one-piece ball valve threaded ball valve 1pc internal threaded thread manual valve

Features:

Good sealing performance, simple structure, small size, light weight, small flow resistance, etc.

Ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. Ball valve is a new type of valve widely used in recent years.

It has the following advantages:

1. The fluid resistance is small, and its resistance coefficient is equal to the pipe section of the same length.

2. Simple structure, small size and light weight.

3. It is tight and reliable. At present, the sealing surface of ball valves is widely used in plastics and has good sealing performance. It has also been widely used in vacuum systems.

4. Easy operation, fast opening and closing, only need to rotate 90 ° from fully open to fully closed, which is convenient for remote control.

5. Easy maintenance, simple structure of ball valve, seal ring is usually movable, and it is more convenient to disassemble and replace.

6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes,

Will not cause erosion of the valve sealing surface.

7. Wide range of applications, from small diameter to several millimeters, large to several meters, from high vacuum to high pressure can be applied.

8. When the ball rotates 90 degrees, the spherical surface should be present at the entrance and exit, so as to intercept the flow.

Applies to:

Working temperature: -29 ～ 180 ℃ (sealing ring is reinforced polytetrafluoroethylene) or -29 ～ 300 ℃ (sealing ring is para-polyphenylene), used to cut off or connect the medium in the pipeline Different materials are used, which can be applied to water, steam, oil, nitric acid, light industry, food, medicine, environmental protection. It is widely used in petroleum, chemical, metallurgy, power, and other media.

Ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. Ball valve is a new type of valve that has been widely used in recent time. It has the following advantages:

1. The fluid resistance is small, and its resistance coefficient is equal to the pipe length of the same length.

2. Simple structure, small size and light weight.

3. It is tight and reliable. The sealing material of the ball valve is widely used in plastics and has good sealing performance. It has also been widely used in vacuum systems.

4. Convenient operation, fast opening and closing, only need to rotate 90 ° from fully open to fully closed, which is convenient for long-distance control.

5, easy maintenance, simple structure of the ball valve, the seal ring is generally movable, easy to remove and replace.

6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface when the medium passes.

7. Wide range of application, from small diameter to several millimeters, large to several meters, from high vacuum to high pressure can be applied. When the ball rotates 90 degrees, the spherical surface should be present at the entrance and exit, so as to intercept the flow.

First, the ball valve can be closed tightly with only 90 degrees of rotation and a small torque. The completely equal valve body cavity provides a low resistance, straight flow channel for the medium. Generally speaking, ball valves are most suitable for direct opening and closing. However, recent developments have designed ball valves to make them have throttling and flow control. The main feature of the ball valve is its compact structure, easy to operate and maintain, suitable for general working media such as water, solvents, acids and natural gas, but also for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be integrated or combined.

Second, the ball valve is a relatively new type of ball valve, it has some unique advantages of its own structure, such as the switch without friction, the seal is not easy to wear, the opening and closing torque is small. This reduces the size of the actuators. Equipped with a multi-turn electric actuator, it can realize the adjustment and strict shut off of the medium. It is widely used in petroleum, chemical industry, urban water supply and drainage, etc.

It works as follows:

First, the opening process

1. In the closed position, the ball is pressed on the valve seat by [wiki] mechanism [/ wiki].

2. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom makes the ball release the valve seat.

3. The valve stem continues to lift, and interacts with the guide pin in the spiral groove of the valve stem, so that the ball starts to rotate without friction.

4. Until the fully open position, the valve stem is lifted to the extreme position, and the ball is rotated to the fully open position.

Second, the shutdown process

1. When closing, rotate the handwheel clockwise, the valve stem starts to descend and the ball leaves the valve seat and starts to rotate.

2. Continue to rotate the handwheel, and the valve stem is affected by the guide pin embedded in the spiral groove on it, so that the valve stem and the ball are rotated by 90 ° at the same time.

3. When it is about to be closed, the ball has been rotated 90 ° without contact with the valve seat.

4. In the last few turns of the handwheel, the angular plane at the bottom of the valve stem is mechanically wedged to press the ball tightly against the valve seat to achieve complete sealing.

Three or two-piece ball valves can be divided into straight type, three type and right angle type according to their channel positions. The latter two types of ball valves are used to distribute media and change the flow of media.

The installation and maintenance of two-piece ball valve should pay attention to the following:

1. Keep the position where the valve handle rotates.

2. It cannot be used as throttling.

3. Ball valves with transmission mechanism should be installed upright.

Four, two-piece ball valve works by rotating the valve to make the valve open or closed. The ball valve switch is lightweight, small in size, can be made into a large caliber, reliable sealing, simple structure, convenient maintenance, the sealing surface and spherical surface are often closed, not easily eroded by the medium, and widely used in various industries.