Products Details

The mounted eccentric half ball valve is an important mechanical product widely used in oil, natural gas, coal and ore mining, refining and pipeline transportation systems. It is also applicable to chemical products, pharmaceuticals and food production systems; Hydropower, thermal and nuclear power generation systems; Water, drainage, heating and gas supply systems for urban and industrial enterprises; Agricultural drainage and irrigation systems; And metallurgical production systems.

The structural features of the valve include:

There is shearing between the cutting ball and the metal seat, especially suitable for media containing fibers, small solid particles and slurries.
With adjustment ability and reliable positioning ability, flow characteristics close to percentage, wide range of adjustment.
With spring loaded movable seat structure, the seat and the ball will not get stuck or separated, reliable sealing, long service life.
The internal parts of the mounted eccentric half ball valve can be installed and removed from the upper part of the valve, which makes it easy to replace and repair the valve without removing it from the pipe during maintenance. The valve adopts eccentric body, eccentric ball and seat design, the valve stem is automatically centered when rotating on the common track, and the closing process is more and more tight, fully realizing the purpose of good sealing. The ball and seat of the valve are completely separated, eliminating the wear of the seal ring and overcoming the constant wear of the traditional ball valve seat and ball sealing surface. The non-metallic elastic material is embedded in the metal seat, and the surface of the metal seat is well protected, especially for the steel industry, aluminum, fiber, micro solid particles, pulp, coal ash, liquefied petroleum gas and other media.

Top type eccentric half ball valve specifications include a variety of models, such as PQ340F, PQ340H, diameter range DN50-DN600, pressure range PN10-PN100, 150LB-600LB, temperature range -20℃-500℃, transmission modes include manual, spiral gear drive, pneumatic, electric, The body material is cast steel and stainless steel, and the connection mode is flange connection.

In addition, the mounted eccentric half ball valve also has the following structural characteristics:

There is no friction when opening and closing, which completely solves the problem caused by the friction between the sealing surface of the traditional valve seal.
Top entrance structure, can be directly online inspection and maintenance, effectively reduce equipment downtime and costs.
Single-seat design eliminates the problem of abnormal pressure increase in the medium of side-mounted eccentric half ball valve affecting the safety of operation.
Low torque design, specially designed stem can be opened and closed with a small wheel.
Wedge sealing structure, provided by the mechanical force of the valve stem, the ball wedge is pressed on the seat to achieve seal, the valve seal is not affected by the change of pipe differential pressure, and the sealing performance is reliably guaranteed under various working conditions.
Sealing surface self-cleaning structure.
Top type eccentric half ball valve materials and specifications are diverse, can be customized according to different application needs, for example, it can be applied to water, carbon steel material, flange connection form, manual drive mode, nominal pressure PN1.0-32.0MPa, through channel, And ANSI B16.5 / GB12459/ DIN/JIS and other standards.

Finally, another feature of the mounted eccentric half ball valve is that its structure adopts the eccentric wedge principle, and the purpose of locking, adjusting and closing is realized through the transmission mechanism. A seal pair is a hard contact seal between metal and metal surfaces. The double eccentric structure is located in the ball chamber when it is opened, and has a large flow cross-sectional area, and the valve will not be washed. When closed, the spool will not be washed. When opened, the spherical surface of the spool gradually moves along the seat, effectively removing scaling obstacles and achieving a reliable seal. It is especially suitable for two-phase mixed transportation which is easy to scale and solid precipitation. The hemisphere part of the valve is made of bimetal material, and different alloys are deposited on the substrate. The valve seat has also undergone corresponding surface treatment and special treatment. The sealing surface group is composed of various types such as anti-corrosion, wear-resistant, and high strength to meet the needs of different occasions.