The Welch 1400N-50 Chemstar pumps have a Teflon lined oil case and additional chemically resistant parts, making the Chemstar pump the best choice for harsh process emissions where an oil sealed vacuum pump is necessary.                                                        

ChemStar high vacuum pump Model 1400N is effective for drying using large manifolds (Shlenk lines). 25 lpm flow rate enables thorough drying, removing corrosive solvents while providing sufficient cold trap residence time to allow solvents to condense.  With ultimate vacuum <0.001 torr, Model 1400N is also suitable for many corrosive chemistry concentrating, drying, and degassing operations as well as rotary evaporation of low-volatility solvents.