The ball valve for soda industry is a new type of valve that is upgraded on the basis of the common half-ball valve to solve the problem of scarring and corrosion in the process of soda ash medium delivery. The valve is mainly used to to cut off, adjust or change the direction of the medium in pipeline, Relaying on many years' R&D experience, we have designed the the soda ash specilized half-ball valve., and the structure and performance has been optimized by Lanzhou University of Technology, and also improved in practical application, the valve is especially suitable for the  outlets of carbonizing tower, connecting tube under carbonizing tower, outlets of AⅡ pump, AⅡ pipe, entrances and outlets of neutral water pump, ammonium alkali pump, isolator for ammonium brine, secondary brine etc. The valve has gained recognition and praise by it's small fluid resistance, good seal performance and anti-scarring and corrosion resistance from our customers..

Since special ball valve adopts eccentric structure, when the hemisphere opens about 8°from the closed position, the hemispherical sealing surface almost completely separates from the valve seat sealing surface, thereby reduces wear between the valve seat and valve disc sealing when it opens and closes. When the valve disc is closed, the force between the valve disc and valve seat sealing surface can effectively cut off the solid particles on the sealing surface of the valve disc, therefore, the semi-ball valve has a good self-cleaning effect on the sealing surface. Following is our test on shear force during the valve is opening and closing, the shear force can cut off steel wire, and the cross-section is still smooth after the paper test .

 

 

Valves currently used in soda enterprise mainly are bass valve, plug valve, globe valve and pulp valve. Generally they are made of carbon steel, stainless steel. These valve are all short in service life and susceptible to leakage. Any leak may made in difficult for users to block off and control so that they have to add more blanks somewhere during carbonizing. The mother liquors spills over and corrodes the equipment around it so that heavier workload could be added to workers. For maintenance and reparation of pre-carbonated liquid pump. Pump AⅡand hot lye pump, the production has to be stopped for a short time because the pumps could not be blocked off, affecting normal production. The external leakage causes mediums to be heaped everywhere (called as " hanging beard" ). Considering the housekeeping on site, frequent flushing has to be carried out to keep the site clean; however, this may raise an environmental issue difficult to completely solve. Meanwhile, it leads to some trouble in normal production and management for the valves could not be blocked off due to scarring and it takes time and efforts to open & close some valves (pulp valves). The medium increase their spilling, weeping, dripping and/or leaking resulting from frequently inspection and repair. The managers, operators and repairment of soda making enterprise are aware of the inconveniences arising from valve problem.