Laboratory vacuum pumps may be categorized as pressure pump or high pressure pump depending on the vacuum or positive pressure required. For either pressure or vacuum, our Welch pressure and vacuum station 2511B-01 will deliver 219 torr vacuum or 33 Psig pressure. It is portable, oil-less and works for non-corrosive aqueous-based fumes. Another pressure pump that delivers 60 psi or 25.5 Hg vacuum may be found in the 54908-037 Welch product. Both are extremely economical, safe and dependable with long histories of dependable service in the lab.
Pressure pumps such as our DuoSeal, belt-driven pumps operate at low rpm and allows them to run cooler and reach lower ultimate pressure with less back backstreaming. Operating at low speed also reduces the rate of friction and wear on components which ensures a longer service life. These pumps are rugged and designed for tough applications. They are quiet and have a wide range of pumping speeds and may be set for continuous running where constant, accurate vacuums are desired. Look for Welch DuoSeal Pumps on our website under Vacuum Pumps for great values and dependable products that have stood the test of time in laboratories everywhere.