The Eccentric Hemispherical Ball Valve is a unique ball valve design featuring an eccentrically mounted hemispherical core, primarily used for precise control of fluid flow and pressure. This valve is renowned for its non-friction switching, self-compensating wear, and excellent resistance to wear and erosion, making it ideal for handling challenging media such as slurries, sludges, ash, wastewater, and fibrous materials. During opening and closing, there is no friction between the hemispherical ball and the valve seat, effectively reducing wear on the sealing elements and significantly extending the valve's service life. Eccentric hemispherical ball valves are widely used in metallurgy, power generation, petrochemical, water treatment, and papermaking industries.
Structural Characteristics and Uses
| English Description |
|---|
| Pressure loss: full-time water loss is zero, flow completely smooth, medium body will not be deposited in the cavity. |
| Granule abrasion resistance: V-shaped opening of the spherical cap and the shear effect between the metal valve seat, in the closing process, only the crown at the last moment before their eyes the ball valve seat, not the formation of friction and resistant seat grinding of nickel alloys, cannot easily be washed and wear, which applies to contain fiber, small solid particles, pulp, etc. |
| Suitable for high-velocity medium: direct flow, strong eccentric - crank to fit the high velocity and no vibration. |
| Long life: no wearing parts, as eccentric open and close the valve when the friction between the sealing surface, then the long service life. |
| Easy maintenance: valve repair without removing the road from the tube, simply open the valve cover can be repaired. |
| Widely used in water, sewage, solid particles containing micro- water, steam, gas, natural gas, oil and so on. |
Implementation of Standards
| English Description |
|---|
| Design and manufacture |
| Inspection and test |
| Flange connection |
| Structure length |
Materials of Main Parts
| Part Name (English) | Material 1 (Grey cast iron) | Material 2 (Ductile Iron) | Material 3 (Cast steel) |
|---|---|---|---|
| Body | Grey cast iron | Ductile Iron | Cast steel |
| Bonnet | Grey cast iron | Ductile Iron | Cast steel |
| Stem | 2Cr13 | 2Cr13 | 2Cr13 |
| Seat | Stainless steel | Stainless steel | Stainless steel |
| Spherical | Ductile iron cover rubber, stainless steel | Stainless steel | Rubber covered steel / stainless steel |
| Hemisphere | Grey cast iron | Ductile Iron | Cast steel |
No drawing available.
