Product
High-performance hard-sealed ball valve
High performance hard sealing ball valve as one of the most conventional products for lianda, on the basis of years of experience, layers of optimization, every detail to do the extreme, and strive to optimize the sealing, fire prevention, anti-static and other performance. The high performance metal hard sealed ball valve is suitable for the most demanding working conditions. Each valve is designed according to the user’s specific application and provides technical support by a professionally trained service department.
1. Transportation pipeline 2. Loading platform
1. Multiple seal, with a more reliable seal
2. Low switching torque
3. Long service life
4. Stable performance
5 .fire-protection design
Structural Characteristics
Instructions
Double thrust bearing design
two coated inner stem bearing rings act as thrust bearings with rotating movement. They use super wear-resistant coating, which can reduce the torque of the valve, and prevent the valve from sticking 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 letter are hard metal to hard, metal winding pad, O-ring / panplug seal / fire graphite rope and other multiple seals, which can also be sealed in the case of fire, with more reliable seal.
Upper bearing design
the valve stem and fixed shaft are equipped with high quality self-lubricating wear-resistant long bearing, which can keep the valve shaft coaxial and eliminate the load caused by the valve switch or valve vibration.
Anti-static design
anti-static structure design, connect the sphere, valve stem and valve body to prevent fire due to static aggregation.
Anti-blowing valve stem
the valve stem adopts high corrosion resistance super alloy, and conducts vacuum heat treatment to improve the surface hardness and prevent strain. Upper packing function structure, to prevent the valve stem blowing out of injury, can achieve online replacement of filler.
Seal of stem fill
valve stem with low leak fill (through API 622 certification), lip seal ring, emergency fat injection seal multiple seal, 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.
Seal at the valve seat
the valve seat is equipped with fat injection hole, fireproof graphite rope, dustproof structure, with fire prevention, dustproof and reliable sealing characteristics. Graphite seal ring or panplug seal can be selected as the seat seal ring according to the actual operating temperature.
Spherical seat sealing surface
sphere-seat sealing surface wide, can reduce the dynamic contact stress, extend the service life of the valve. For different harsh working conditions, spray welding of different high strength carbide layer. At the same time, the sealing structure of DBB, DIB-1 and DIB-2 can be designed according to customer needs.