Product
Wear-resistant adjustment ball valve
The wear-resistant regulating ball valve developed by Lianda according to special working conditions can be used for the flow regulating valve under harsh working conditions, which can meet the requirements of scour resistance, long service life, large pressure difference, many action times and fast action speed. After the feedback of many coal chemical industry users, the use effect is good, and the sealing and service life far exceed the V-type regulating ball valve, which can replace the imported flow regulating valve.
1. Coal chemical industry (black water, gray water regulation) 2. Coal chemical industry (black water, gray water regulation)
1. Resistant to erosion and cavitation
2. reliable seal
3. Low switching torque
4. fire-protection design
5. Long service life
6. Long service life
Structural Characteristics
Instructions
Double group thrust pad design
it can reduce the valve torque, prevent the valve from stuck after using for a long time, and prolong the service life of the valve.
External leakage point seal
middle flange, lower fixed shaft, upper packing function are hard metal to hard, metal winding pad, O-ring multiple sealing, can also be sealed in the case of fire, the seal is more reliable.
Design of the sphere bow opening
the instantaneous flow of the valve opening is more than 3 times higher compared with the traditional structure, which greatly reduces the scouring damage of the medium to the sphere. At the same time, the existence of the incision increases the thickness of the ball opening and extends the service life of the sphere.
Bearing cavity sealing design
the upper and lower bearing cavity is designed with a sealing structure to prevent the torque of the valve or the solid medium entering the bearing cavity.
Current limiting seat design
by the fluid through the seat hole will produce pressure drop, when the pressure drop more than a certain value (both critical pressure drop), flow will not rise, thus the function of flow regulation, the medium through the seat hole flow or parallel to the pipeline, not on the side of the valve body erosion, prolong the service life of the valve.
Scraper design on the seat
the scraper structure design is adopted on both sides of the sealing surface, so that the sphere and the seat have the self-cleaning function in the switching process, effectively prevent the accumulation and adhesion of particles between the sphere and the valve seat, and ensure the smooth and continuous valve operation, not stuck.
Stem seal
use low leakage packing (through API 622 certification), O-ring, emergency fat injection seal at the stem for multiple seals, with more reliable seal.
Packing loading and sealing
the packing place adopts the disc spring loading design, and the long-term sealing is more reliable.
Valve seat seal design
graphite seal ring quantitative compression, the use of high quality graphite, can achieve good sealing for a long time
Structural design of ash discharge ring
the disc spring is provided with a ring structure for ash discharge to prevent the accumulation of materials behind the disc spring.
Block double seal design
graphite seal ring quantitative compression, the use of high quality graphite, can achieve good sealing for a long time.
Ball mouth hardening process
when the valve is in the small opening adjustment, the position of the ball mouth is often washed. In order to improve the service life of the ball, we will weld 20mm of the cable alloy at the ball mouth.