floating ball valve of structural features

The opening and closing of the valve are usually confirmed by the position of the handle. The handle is parallel to the pipeline to open the valve and vertical to close the valve. However, the connection between the handle and the valve stem of the ordinary ball valve is flat and square, which is easy to cause the wrong operation of the valve due to the wrong connection between the handle and the valve stem.

1. Prevent misoperation of the handle

The opening and closing of the valve are usually confirmed by the position of the handle. The handle is parallel to the pipeline to open the valve and vertical to close the valve. However, the connection between the handle and the valve stem of the ordinary ball valve is flat square, which is easy to cause the wrong operation of the valve due to the wrong connection between the handle and the valve stem. However, the connection between the handle and the valve stem of the industrial open valve floating ball valve is flat square, which is impossible to cause the wrong connection of the handle, let alone the wrong operation.

2. Locking mechanism

The manual ball valve can be locked at the fully open and fully closed positions to prevent the wrong operation of the valve caused by the handle being pulled by non workbench personnel, and to prevent the valve from opening or closing due to pipeline vibration or unmeasurable factors and accidents, especially for the working pipelines such as explosive oil and chemicals, or in the field piping.

3. Anti flying valve stem shoulder

In order to prevent the danger of the valve stem flying out due to the abnormal rise of the internal pressure of the valve, the floating ball valve is provided with a shoulder at the lower part of the valve stem. In addition, in order to prevent leakage after the valve stem sealing packing is burnt in case of fire, a thrust bearing is provided at the contact between the shoulder at the lower part of the valve stem and the valve body to form an inverted sealing seat to prevent leakage and avoid the expansion of the accident,

For ordinary ball valves, if the packing of the valve rod is burnt, or the packing gland and bolts are damaged, the valve rod is easy to fly out of the fluid under the effect of internal pressure, and accidents may occur, even to the extent of accidents, which is not allowed by the safety requirements.

4. Antistatic function

In order to prevent static electricity from being generated due to the friction between the ball and the valve stem and TFE or RPPL, the floating ball valve is easy to ignite the easy medium and cause working condition accidents. A static conductive spring is set between the valve stem and the ball and between the ball and the valve stem, so that static electricity can be introduced to the ground through the pipeline to ensure system safety.

5. Sealing structure of valve body without external leakage

The joint between the valve body and the side valve body is sealed by a cushion. Fire, high-temperature vibration and uneven opening and closing torque can cause external leakage. In addition to relying on gasket sealing, the ball valve is specially designed for the metal of the valve body and the side valve body to form a metal seal to ensure no external leakage.