Advantages, Disadvantages And Precautions Of Fluorine-lined Globe Valve

Lined Globe Valve has the following advantages:

1. Simple structure, easy to manufacture and maintain.

2. Small working stroke, short opening and closing time.

3. Good sealing, small friction between sealing surfaces, and long service life.

Disadvantages of fluorine-lined stop valve:

1. Large fluid resistance, large force required for opening and closing.

2. Not suitable for media with particles, high viscosity, and easy coking.

3. Poor adjustment performance.

The types of high-pressure stop valves are divided into external thread type and internal thread type according to the position of the valve stem thread. According to the flow direction of the medium, there are straight-through type, direct current type and angle type. According to the sealing form, the stop valve is divided into packing seal stop valve and bellows seal stop valve.

The following matters should be noted when installing and maintaining the fluorine-lined stop valve:

1. The stop valve operated by handwheel and handle can be installed at any position of the pipeline.

2. Handwheel, handle and large motion mechanism are not allowed to be used for lifting.

3. The flow direction of the medium should be consistent with the direction of the arrow shown on the valve body.

The stop valve is the most widely used valve. It is popular because the friction between the sealing surfaces is small during opening and closing, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain, and it is suitable not only for medium and low pressure, but also for high pressure. Its closing principle is to rely on the valve stem pressure to make the valve disc sealing surface and the valve seat sealing surface fit tightly to prevent the flow of the medium.

The stop valve only allows the medium to flow in one direction and has directionality when installed. Its structural length is longer than that of the gate valve, and the fluid resistance is large. When it is running for a long time, the sealing reliability is not strong.