Why straight stroke regulating pneumatic valve to collect performance than quarter-turn pneumatic valve?

we know straight stroke regulating pneumatic valve to collect performance more bad, is much less than the Angle of the stroke of the pneumatic valve stem performance, then you know why quarter-turn pneumatic valve stem is better than straight stroke regulating pneumatic valve?
straight stroke control of pneumatic valve stem with poor performance because its pneumatic throttle valve core is vertical, and medium is a horizontal flow into the outflow, pneumatic valve cavity flow is bound to turn down turn, this makes the pneumatic valve flow becomes very complex, so there are a lot of dead zone, and precipitation in the medium provides more space and so on, will be blocked. Quarter-turn pneumatic valve throttle direction is horizontal, flow into the medium level, level, easy to take unclean medium, and its flow is simple, so the precipitation of medium space will be very few, therefore quarter-turn pneumatic valve to collect performance is good.