Mercury” has one of the largest selection of Manually and mechanically actuated valves consisting of plunger, palm button, push button, selector knob, roller lever, direct roller , foot pedal ,hand lever , disc rotary and hand slide type valves. They are divided in 3 series i.e S series , R series and SV series. These valves are available in 3WAY and 4WAY configurations in various port sizes.