Valves in KMV series are known as mushroom type valves, because of extended, tall button with characteristic cap at the top. Some valves in this series have spring - after push, knob (mushroom) returns to previous position, other (no return) stay in position as "pushed" and have to be pulled to return to default position.
Common details:
Maximum work pressure 10 bar.
Flow from 700 l/min to 1000 l/min (with 5 bar pressure) depending on valve size.