Dry rotary vane pumps are oil-free vacuum pumps that are very low maintenance. The compact and lightweight design of the ORION series dry rotary vane vacuum/pressure pump adds to ease of operations. ORION rotary vane pumps are an ideal alternative to standard oil sealed rotary vane pumps. The ORION pumps can quickly be added to your system with its built in particulate filters and silencers for quiet operation and. The cooler running outboard bearing increases service life. Dry Rotary Vane Pumps eliminate the need for oil, are virtually maintenance free and operate at a maximum of 70 dB(A). ORION pumps operate at a range of 5.5-150 CFM and can achieve an end vacuum of 27"Hg and pressure to 14 PSIG.