Pneumatic Fixed Ball Valve Large Diameter Ball Valve

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Shanghai Yawang Valve Co., Ltd.

Shanghai, China

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Pneumatic fixed ball valve adopts the design of upper and lower stem fixed valve core (shaft support type) and movable sealing seat.
Work is more stable. With the automatic compensation function, the two-way sealing valve seat has a large shear force and self-cleaning function when there is no gap between the two-way sealing valve seats.
It is especially suitable for the on-off of imperial fibers and suspensions with tiny solid particles and viscous media.

Working principle:

The ball of pneumatic fixed ball valve is fixed by the upper and lower stems.
When working, the fluid pressure will not make the ball move to the valve seat, and the valve seat will not be deformed by excessive pressure.
The valve stem is provided with self-lubricating bearings to reduce friction, and the switching torque is small.
Both valve seats are preloaded by springs.
The seal is made of polytetrafluoroethylene and is embedded in the steel solid, and there is a spring at the rear of the steel ring to ensure that the valve seat is close to the ball.
When the pressure in the cavity of the valve rises abnormally and exceeds the pressing force of the spring, the valve seat retreats away from the sphere to achieve the effect of automatic pressure relief, and the valve seat automatically resets after pressing.
The structure of the fixed ball valve makes the sealing performance of the fixed ball valve stable and labor-saving and has a long service life.
It is suitable for long-distance pipelines and general pipelines.

The automation control system of papermaking
Petrochemical
Chemical
Metallurgy
Electric power
Environmental protection
Petroleum
Light industry
Other industrial sectors.

1. The pneumatic fixed ball valve adopts a fixed ball design, and the relative moving parts are made of self-lubricating materials with a small friction coefficient, so the operating torque is small, and the long-term sealing of the sealing grease makes the operation more flexible.

2. Pneumatic fixed ball valve adopts high platform structure and ISO5211 connection standard, which can make the installation of electric/pneumatic actuators more professional.

3. Pneumatic fixed ball valve adopts full-diameter design, and the flow resistance is small.

4. The metal hard-sealed pneumatic fixed ball valve adopts a two-way metal movable sealing structure, with automatic compensation and self-cleaning functions, and excellent sealing performance.

5. The pneumatic fixed ball valve adopts a fixed ball design and adds a preload spring so that the ball valve has an automatic pressure relief function.

6. Each ball valve has two movable sealing seats, which can be sealed in both directions, so it is not necessary to consider the flow direction of the medium during installation.

7. It has a fire-proof and anti-static structure, and a conductive spring is set between the valve stem and the valve body and between the valve stem and the sphere to prevent electrostatic ignition from igniting flammable media. Make sure the system is secure.

8. Double protection of the refractory structure. When the sealing ring is burned out in case of fire, each sealing part of the ball valve can form a metal-to-metal hard sealing structure.

9. Automatic pressure relief structure, when the liquid medium remaining in the middle cavity of the valve is vaporized due to the increase in temperature so that the pressure in the middle cavity rises abnormally, the middle cavity medium can automatically release the pressure by pushing the valve seat by its own thrust, thereby Make sure the valve is safe.

10. Pneumatic, electric, hydraulic, and pneumatic adjustment type and electric adjustment type are optional.