Laboratory vacuum pumps    diaphragm pumps    linear diaphragm    linear piston    rocking piston    micro / mini pumps    sampling pumps     Europe, Middle East and Africa    North and South America    Asia Pacific KNF Neuberger, Inc. - www.knf.com - Two Black Forest Road, Trenton, NJ 08691-1810, USA E-Mail: knfusa@knf.com, Tel. +1 (609) 890 8600, Fax +1 (609) 890 8323 products: Laboratory pumps, Diaphragm vacuum pumps, vacuum systems: consisting of a KNF Pump, Stand and Programmable Pump Controller. company profile: KNF Neuberger, Inc., based in the Trenton, NJ area since 1977, designs and manufactures standard and custom-tailored air, gas and liquid diaphragm pumps for the USA, Canada and Mexico markets. The company's broad range of products support a wide variety of applications,either as a vital part of an OEM (original equipment manufacturer) instrument, or as a stand-alone laboratory appliance. KNF is a pioneer in the use of PTFE materials for pumps that handle aggressive gases or liquids, and holds over 300 patents; clearly the world leader in diaphragm pump innovation. WELCH RIETSCHLE THOMAS - 7301 North Central, Skokie, IL 60077, USA products: DryFast Ultra 2-Torr chemical-duty diaphragm vacuum pumps, models 2021 and 2031, are oil-less, 2-stage pumps designed to strip solvents. With respective pumping capacities of 22 and 32 L/min, models 2021 and 2031 are rated for pressure to 29.8 in. Hg and generate flow and vacuum level needed to handle high boiling point solvents (less than 160°C). They utilize corrosion-resistant PTFE on all wetted surfaces and do not require cold traps to operate. company profile: The W.M. Welch Manufacturing Company sold its first vacuum pumps to teaching laboratories over 100 years ago. Today, Welch Rietschle Thomas offers a broad range of rugged, high performance rotary vane and oil-free vacuum pumps.     diaphragm vacuum pumps     micro vacuum pumps     sampling vacuum pumps     Keywords     www.vacuum-guide.com