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 technical report is limited to automated valves normally operating in either a full open ... and sizing of gas over oil actuators, both rotary and linear, provided in double and single acting ...

March 21, 2025 /PRNewswire/ -- According to a new market research report titled, 'Control Valves Market Size, Share, Forecast, & Trends Analysis by Product (Rotary Control Valves, Linear Control ...