Main control valve to the body shape of the spherical ball valve

Subsequently, the V-notch (V-notch) single-seat (single-port) and two-seater (double-ported) the control valve (globevalve) advent. Have appeared in the 1940s for high pressure medium angular control valve (anglevalve) for corrosive medium diaphragm control the valve (barrierdiaphragmvalve) for large flow applications, valve (butterflyvalve), and development of a valve positioner (valve positioner )flange solenoid valve
 and other products o 1949 in Leverkusen, Germany set up the chemical and petrochemical industries, a professional association - Measurement and Control Standards Association NAMUR (the Normen Arbeitsgemein-schaftMeb-UndRegeltechnik), and to carry out the work of the development of standards. 50 to 60 years the three-way control valve (three-wayvalve) for ratio control and bypass control, but also for further study of ball valve, for a large pressure difference and noise reduction sleeve control valve ( cagevalve).stainless steel pneumatic cylinders