Dry rotary vane pumps do not have any oil in them. The tip of the vanes come in direct contact with the pump housing. The vanes are typically made out of a carbon based material. Typical maintenance of this type of pump is: vane changes.
The EMSE interactive Design Guide calculates total demand, recommends multiple system designs, calculates intake, exhaust, riser, branch and zone piping sizes--all optimized based on user input. Start designing your system now.