How can the flange ball valve be locked, and how to deal with the ball valve bracket locked?

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.

Can't you lock the screws and bolts, is there any problem?

The handling method of the ball valve support lock is as follows:

First, never force open the ball valve, which may damage the valve or valve connections.

Ball valve latches are usually caused by the valve not being properly reset when it is closed. So, try gently moving the valve handle to see if you are able to bring it back into the correct position.

If manual reset doesn't work, consider using an appropriate tool to resolve the issue. For example, use a wrench or pliers to gently twist the shaft of a ball valve until the valve is reset to the correct position.

If these methods still don't work, or if you're not sure how to deal with the ball valve latch issue, consider seeking professional help. Please contact a professional mechanical engineer or valve repair service provider in your area for assistance and advice.

It is the difference in the form of connection, the connection of the flange and the fixation on the pipe need bolts, and the thread buckle does not need to be screwed directly.

First introduce flange connection: Flange connection is a pipe connection method. For pipe or valve component connections.

The flange is the flange piece in the flange connection or the flange part integrated with the valve component;

Flanged ball valve is a ball valve with a flange installed (ball valve is a kind of valve); Generally, large-diameter valves are connected by flanges.

There is no difference between threaded valves and flanged valves in terms of purpose and function.

Generally, the specifications of thread valves should be small, and the specifications of flange valves should be large. However, when the flange valve is repaired and maintained, it is easier to disassemble and install than the threaded valve.

To put it more simply, it is different from the way it is connected to the pipeline, the thread valve is threaded connection, and the flange valve needs to be connected with a relative flange, but the flange connection is more convenient to install and disassemble.

The cost of threaded valves is lower than that of flanged valves, and it is easy to install, but it is not convenient for maintenance and disassembly.

The connection method is different, one is flange connection, and the other is threaded, which is divided: inner and outer screw.

It's better to consider the thread buckle, it's much cheaper. Flange's too expensive.

Define the English name; The opening and closing parts of the Flange Gate Valve are rams, the direction of movement of the ram is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed, and cannot be adjusted and throttled. The ram has two sealing surfaces, and the most commonly used mode gate valve has two sealing surfaces forming a wedge, and the wedge angle varies with the valve parameters, usually 50, and 2°52 when the medium temperature is not high' 。The gate plate of the wedge gate valve can be made into a whole, which is called a rigid gate; It can also be made into a ram that can produce a slight amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle in the processing process, which is called the elastic ram.

The types of gate valves can be divided into wedge gate valve and parallel gate valve according to the sealing surface configuration, and the wedge gate valve can be divided into: single gate type, double gate type and elastic gate type; Parallel ram type gate valves can be divided into single ram type and double ram type. According to the thread position of the stem, it can be divided into two types: open rod gate valve and dark rod gate valve.

This type of valve should generally be installed horizontally in the pipeline.

When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the ram to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forcibly sealed, that is, when the valve is closed, the ram should be forced to the valve seat by external force to ensure the tightness of the sealing surface.

If the gate plate of the gate valve moves in a straight line with the valve stem, it is called the lifting rod gate valve (also called the open rod gate valve). Usually there is a trapezoidal thread on the lifting rod, through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is, the operating torque is changed into operating thrust.

When the valve is opened, when the ram lift height is equal to 1:1 times the valve diameter, the flow of the fluid is completely unobstructed, but this position cannot be monitored during operation. In actual use, it is marked by the apex of the valve stem, that is, the position that cannot be opened, as its fully open position.

In order to account for the lock-up phenomenon of temperature changes, it is usually opened to the apex position, and then reverted back to 1 2 1 turns, as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the ram (i.e. the stroke).

Some gate valves, the stem nut is located on the gate, and the handwheel rotates to drive the valve stem to rotate, and the gate is lifted, this valve is called the rotary rod gate valve or the dark rod gate valve.

Flange valve should refer to the connection form of the valve, usually flange type, clamp type, welding type, etc., flange type means that the connection between the valve and the pipeline is realized by the docking of the flange.

It is the valves with flange structure at both ends.

Flanged ball valves. How it works:

First, the opening process.

1. In the closed position, the sphere is subjected.

Stem. The mechanical pressure is pressed on the valve seat.

2. When turning counterclockwise.

Handwheel. , the stem moves in the opposite direction, and its bottom angular plane disengages the ball from the 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 begins to rotate without friction.

4. Until it reaches the fully open position, the valve stem is lifted to the limit position, and the ball rotates to the fully open position.

Second, the closing process.

1. When closed, rotate clockwise.

The handwheel, the stem begins to descend and causes the ball to move away from the seat and start rotating.

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 rotate 90° at the same time.

3. When it is about to close, 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 stem is mechanically wedged to compress the ball to make it tight.

Ground pressure. On the seat, a complete seal is achieved.

Ball valve and gate valve are the same type of valves, the difference is that its closing part is a ball, and the ball surrounds the valve body.

Heartline. A valve that rotates to open and close. Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of the medium. Flanged ball valve standard GB T21465-2008

Valve terminology. It is defined as: the opening and closing parts (balls) are driven by the valve stem and rotate around the axis of the valve stem.

1 When closing, rotate the handwheel clockwise, the stem begins to descend and makes the ball leave the seat and start rotating.

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 rotate 90° at the same time.

3. When it is about to close, 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 stem is mechanically wedged to compress the ball so that it is tightly pressed against the valve seat to achieve a complete seal.