A new range of air preparation equipment has been developed to give higher flow rates and more precise control of air pressure and flow in arduous environments such as food, water processing and petrochemical applications. Developed by Midland Pneumatic, the 3550 series encompasses 316 stainless steel filter regulator units, filters, pressure regulators and lubricators. The flow rate has been doubled over that of previous models, allowing smaller units to be specified so as to reduce both weight and cost. The 3550 series units are available in four sizes. Flow rates range from 2.4Cv to 5.0Cv respectively, doubling the flow over previous models in most cases. Filters and filter regulators have both manual and automatic drain options, regulators can be self-relieving or non-relieving and a range of mounting brackets, hand wheel kits and tamperproof kits is available. Filter elements are 40micron as standard and are available down to 5microns. Inlet pressures are 20bar and outlet pressures can be selected using a choice of four springs from 2 to 12bar. Working temperatures vary from -20 to +80 degrees C as standard and a special low-temperature version is also available for extreme conditions, operating down to -50C.