Expansion valve is widely used antibacterial out a whole new vista of development

Origin of the valve as a fluid delivery system control unit as far away as 4000 years ago, first appeared in China , when the valve is an original cork valve , it is used in transporting salt water bamboo pipeline. Since then, with the development of  Trunnion ball valve  to be applied to the valve of the most traditional , ancient, heavy industry - the fermentation industry , the steam , the medium switching, in order to improve people 's working conditions, reduce labor intensity. With excellent brewing Maotai , fen technology in the world famous. With the development , technological advances fermentation technology applications continue to get the extension and expansion of fermented products , more and more  Instrumentation ball valve from the simple fermentation brewing industry extends to the medical and health industry, pharmaceutical antibiotics , hydrocortisone and prednisone and other chemical medicines , antibacterial valve to expand out an  Valve manifolds application of new development world. With large quantities of medicines , modernization and automation of industrial production, are increasingly exposed valve manufacturing technology of antibacterial drugs and pharmaceutical production process requirements of non-adaptive and gaps. Pharmaceutical industry than it made ​​the request of the fermentation brewing industry more scientific and rational , higher, better food and pharmaceutical industries operate GMP requirements .

Reasonable spool streamlined design is to reduce the axial flow valve performance, and these flow regimes effective way to improve the flow capacity

Axial flow check valve for its smooth operation, water hammer pressure is small , easy to cavitation , the medium pressure changes fast response, low noise and good sealing , etc., are widely used in oil and gas gathering pipeline network and other pump outlet Fire and petrochemical pipes for the non-return devices. Axial flow valve spool to its linear structure is reasonable flow resistance coefficient , pressure loss, boundary layer separation flow pattern greatly affect its performance , sleek design and reasonable spool axial flow check valve is to reduce these flow  High pressure ball valve  and improved flow capacity and effective way. The design method of the previous valve passages are usually small change in slope of the straight line and the curve of a linear combination , the valve flow patterns  Trunnion ball valve  its performance . The paper -based sources and sinks France and precise method of mathematical expressions , presents a check valve spool axial  2 way manifold  design. Linear design methods valve design uses source-sink method . Source-sink method is the zero flow line style design, the design of this method over the fluid flow channel has a smaller flow resistance , and the boundary layer easily separated , the valve meet the movement of fluids , but not all of the sources and sinks France are suitable for linear valve design .