There are a variety of 10 to 30 year old pneumatic valve stems in this Commercial Building. The Valve stems move up and down by pneumatic actuators, Springs and diaphrams.
What is best lube for pneumatic valve stems, in service for Chill Water, Steam, Heating Hot Water?
20 Weight Motor Oil?
Penetrating, Rust Buster Oil?
Silicone Spray Lube?
Silicone paste lube?
Some Pneumatic valves are Honeywell, some are Siemens. What material is in the Packing? What can help the packing last longer? Expand to stop drips? Loosen to free a stuck (Frozen) valve Stem?