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The structure of Ball Valve is that the ball center is fixed at the center point by the upper and lower shafts, and no displacement will occur under the pressure of the medium.

American Standard Flange Ball Valve Description:

1. Anti-leakage stem

In order to prevent the valve stem from flying and causing abnormal internal pressure increase of the valve, the shoulder is fixed to the lower part of the stem. In addition, in order to prevent leakage from the burnout of the valve stem packing in a fire, the thrust bearing is in contact with the lower shoulder of the valve stem and the valve body, thus forming a sealing seat to prevent leakage and avoid accidents.

2. Key locker

The lock can be used to turn the manual valve when it is fully opened or closed, preventing the shutdown of personnel, which may cause the valve to move. It can also avoid the electric shock caused by the opening or closing of the valve pipeline, unpredictable factors, which may cause accidents. Working pipelines such as flammable and explosive oil, natural gas and chemicals, or for on-site pipeline sites, the locking device is particularly useful.

3. Fire safety structure

When the trunnion ball valve is used normally, its valve seat and ball are sealed by the valve seat retainer O-ring and the body is sealed, which is soft and reliable. When the valve seat and O-ring are injured, the valve seat retainer and the body will be sealed with expanded graphite. This behavior is for the purpose of fire safety.

4. Anti-static equipment

In order to prevent the friction between the ball, rod and PTFE to generate static electricity that may ignite flammable items and explosives and cause accidents, in this ball valve, static conduction springs are used between the valve stem and the ball, and the valve stem and the body so that static electricity is grounded and the system safety is guaranteed.

5. Free leakage body sealing structure

The valve switch position is smooth, the valve body and the valve bonnet are double-stamped with gaskets and O-rings, on this basis, such reasons as fire, high temperature, shock absorption and uneven opening or closing torque will not cause external leakage.

6. Double Blocked Bleed (DBB)

When the ball is in full open or closed position, the emitter material body can release the drainage and emptying device in the center of the cavity. In addition, the very center pressure in the valve cavity can be released to the low pressure end of the seat of its own rescue.

7. Emergency Seal

Compound injection hole design and compound injection valve installed in the valve stem/cap and body support valve When the seal valve stem or seat is damaged and induced leakage, this compound can be used to make a second seal concealed check valve installed beside the compound injection valve to prevent the material from flowing out due to the effect of the compound, the emitter composite top of the injection valve composite quick connection connector injection gun.

8. Relieve automatic body concave

When the body pressure rises abnormally, such as unstable factors, the trunnion ball valve downstream valve seat will be normal pressure, while the abnormal pressure is automatically released, and the upstream seat of the seal is not damaged.

9. Various drive types

The valve top pad is designed according to ISO 5211, which is convenient for communication and connection of various drives. The common drive types are manual, electric, pneumatic, and pneumatic/hydraulic.