The Challenges With Rotor Valves
There are many problems with rotary valves. Maintaining them requires skills in tying knots, gentle tapping with special hammers, not to mention all those little screws and bumpers. Then after they are completely apart, they must be cleaned off all the dirt and debris on the valves and inside the casings. Lubricating and returning them to their proper casing and reassembling are the next hurdles. This first picture here shows valves from an instrument that the valves were barely working on. You can see the oxidation and staining on the valves from lack of lubrication turning them almost black. Prolonged lack of lubrication along with dirt and debris caused this build up inside the casings and prevented the rotors from turning smoothly. Sometimes it is so bad we have to forcibly, but gently, drive the valves out of the casings. We then have to clean the valves and the body of the instrument in our ultrasonic cleaner to get them back to new condition. In the second picture you can see the valves after they have been cleaned just before they are re-installed in the instrument. Proper lubrication will keep your valves looking this way and prevent sluggish action due