One of the distinguishing features is that they don't need valves to operate. That's to say, the Wankel rotary engine design doesn't have valves -- but quite a few rotary engine designs have ...

The video below starts with a brief but clear explanation about how hydraulic circuits work, as well as an explanation of the rotary dual-action proportional valve he designed. All the parts are ...

Using an actuated ball valve for isolation on the steam train to the process can lead to water hammer, pressure spikes, loss of product, or bacteria growth. In contrast, a rotary valve has exceptional ...

In case this is a rotary valve, add 3 dB to the total. If your FL factor is different from 0.7, then add the following ∆FL numbers: In cases where your fluid is something other than water, add the ...