Rotary Valves Oils---ROTOR (product #1102 2 oz)

When we developed ROTOR, we included an effective corrosion inhibitor. The combination of this inhibitor and several non-evaporating lubricants results in an oil that dramatically retards corrosion by passivating the brass surface while simultaneously enhancing the smooth feeling of the rotary valve movement. ROTOR is the best choice for the serious musician playing on an expensive rotary valve instrument (e.g., the French horn). It is also the best choice for student rental programs because these players are less inclined to oil their valves routinely (if ever).

Rotary valves enjoy the benefits of an actual (spindle)  bearing instead of a simple sliding surface.  Except for lubrication of the bearing, rotary valves do not need the frequent lubrication which is common with piston valves. However, unlike piston valves, the surface of most rotary valves is naked brass. In an environment rich in carbon dioxide, moisture, and electrolytes (breath aerosols), the brass valves undergo constant attack.  The formation of copper and zinc carbonates - as evidenced by the blue and green color - can becomes so severe that dezincification and carbonate buildup eventually cause the valves to be immovable or destroyed altogether.