Stokes Vacuum, Inc. has designed a special model of it Chem-Dry Vacuum Pump for service with corrosive applications such as certain aggressive acids. To resist corrosion, the body, heat exchangers, gas piping, drain tanks, drain piping, partition plates, and purge chambers (wetted parts) are constructed of 316 stainless steel.. The rotor is cast iron with Teflon over nickel coating.
The pump uses no steam, oil, water, or other sealing fluid that could cause environmental pollution. The need for workers to handle contaminated oil or other seal fluids is eliminated. The pump has lower operating costs, according to the company, because there is no seal fluid to purchase and no downtime for changing the fluid. Stokes? Chem-Dry Pumps are available with displacements up to 750 cfm. In pump-blower combinations pumping speed can reach 50,000 cfm.
Stokes Vacuum, Inc.