Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

Ball valves, gate valves, plug valves... choosing the right locking device can seem a difficult decision. But, in fact, answering a few questions will he Valves come in a wide range of shapes and ...