Laboratory vacuum systems    diaphragm pumps    linear diaphragm    linear piston    rocking piston    micro / mini pumps    sampling pumps    more / other vacuum pumps     Europe     Asia Pacific     America     KNF Neuberger, Inc. - www.knf.com - Two Black Forest Road, Trenton, NJ 08691-1810, USA email: knfusa@knf.com, Tel. +1 (609) 890 8600 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. products:   KNF Laboport Laboratory pumps, Diaphragm vacuum pumps, vacuum systems: consisting of a KNF Pump, Stand and Programmable Pump Controller. BRANDTECH SCIENTIFIC, INC. - www.brandtech.com 11 Bokum Road, CT 06426-1506 Essex, USA email, Tel. BrandTech Scientific is the US and Canadian distributor for the VACUUBRAND® line of vacuum equipment from Germany through laboratory supply dealers. products:   Vacuum Pumpsa and Vacuum Pump Systems, Vacuum Gauges VACUUBRAND offers its chemistry-design vacuum pumps in a comprehensive line that ranges from stand alone dry pumps, through vacuum pumping systems with electronic controllers, to VACUU-LAN® vacuum local-area networks. VACUUBRAND pumps and pumping systems are well-suited for typical lab applications including rotary evaporation, centrifugal concentration, vacuum filtration, gel drying, vacuum drying, freeze drying. WELCH RIETSCHLE THOMAS - 7301 North Central, Skokie, IL 60077, USA email, Tel. 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. products:   chemical-duty diaphragm vacuum pumps 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.    Keywords    www.vacuum-guide.com