• Resistant to corrosive chemical vapors
• Will not consume or pollute drinking water
• Ideal for rotary evaporation and gel drying

Designed for pumping corrosive gases such as acetone, acetic acid, benzene, methanol, or nitrogen oxides, without the need for cold traps, drinking water, or pump oil. PTFE resin heads and Kalrez® wetted parts resist chemical attack and keep pumped medium analytically pure. Multi-port valves resist damage from liquids-no more inlet traps. Oil-free operation eliminates the need to purchase expensive replacement oil and disposal of contaminated oil. The heads are easily disassembled for cleaning with only a screwdriver. For 115 V, 60 Hz.

20975C includes a brass vacuum gauge, a fine thumbwheel control and a brass bleeder valve to allow instant and precise adjustment of the desired vacuum.