Oil free vacuum pump     ATEX dry pump     centrifugal exhauster     roots vacuum pump     scroll vacuum pump     side channel     lubricated rotary screw     rotary vane     liquid ring         America     Asia Pacific     Europe         France     Germany     Italy     Spain     United Kingdom     BUSCH GVT Ltd - - The Forge, Congleton, Cheshire CW12 4HQ, United Kingdom Matthew White, Sales Director, email, Tel. products:   Dry vacuum pumps Graham's Dryflo ALLex range provides vacuum engineered solutions for the Pharmaceutical, Chemical, Food and Process industries. The Dryflo ALLex pump is a unique patented design utilising isochoric compression through gas recycling. Edwards - - Manor Royal, Crawley RH10 2LW, United Kingdom email, Tel. world leader in vacuum technology for semiconductor. The company is engaged in the development, manufacture and support of a wide range of vacuum pumps, systems, boosters and accessories based on a number of technologies and capable of achieving high vacuums down to 10-7 mbar. Edwards pioneered the oil-free dry pump, originally for the semiconductor industry and subsequently for other industrial processes, and now markets a series of dry pumps using claw, roots, scroll and combined mechanisms. Typical applications are also in the chemical and pharmaceutical processes, e.g. distillation, reaction, drying. products:   Dry vacuum pumps - The DP series consists of four models: DP80, DP160, DP250 and DP400 giving vacuum levels down to 0.5 mbar. They are three-stage claw mechanisms, mounted vertically, inlet at the top, so that any liquid can drain through the pump. The gearbox is protected from process fluids by double shaft seals and a gas purge system. As claw pumps can experience hydraulic lock, a disengaging torque limiter is provided between motor and pump. - The CDX1000 (900m3/h, designed for use in pharmaceutical and industrial applications) is the first of a new family of dry vacuum pumps with double-ended screw technology. The CDX range features a pair of variable pitch rotors machined to exacting tolerances with no need for coatings or a compression plate at the exhaust. Variable pitch geometry provides staged compression along the length of the screw resulting in lower running temperatures and lower process power consumption. Northey Technologies Ltd. - - Nortech House, Allens Lane, Poole, Dorset, BH16 5DG, United Kingdom email, Tel. Northey invented the Hook & Claw dry vacuum pump and compressor in the 1930's. Northey Boyce, Northey Rotary Compressors and Northey Technologies Ltd (NTL) are all descendants from the original company. products:   Dry vacuum pumps Rough vacuum down to 50 mbarA, and lower intermittently, can be achieved with a single-stage in continuous operation, with two-stage packages achieving 1-2 mbarA. As with compressors, the vacuum pumps can be air or water cooled and are capable of handling wet and dirty gasses. Flow rates above 1200 m3/hr can be obtained by single machines and again these can be operated in parallel to achieve higher flow rates.     Keywords     www.vacuum-guide.com