In addition, there are hopper jitter can help to reduce the flow problem, but its drawback is that there is no brass ball valve to stop flow of powder and there is no control of the flow meter. A more comprehensive design with jitter hopper's system should also include block valves and metering equipment or feeder. However, this will need to use more of the top space, more and more maintenance costs.
 
     Cone Valve Technology

     In the early 80's, cone-brass angle valve technology to market, improve the flow of a combination of advantages and some characteristics of the traditional valve. Industry, one of the leading enterprises, Material Control Engineering Company is now Matcon companies, the introduction of a comprehensive measurement, discharge valve and the integration of technology into a cone-shaped valve Matcon today. Conical valve inventor and founder Ivan Semenenko is to push the technology a key figure in the forefront of powder processing.