EX-FLOW Ex-Proof (ATEX Zone-1 Certified) Mass Flow Meters / Controllers for gases - Bronkhorst - #1

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> Introduction Bronkhorst High-Tech B.V., the European market leader in thermal Mass Flow Meters/Controllers and Electronic Pressure Controllers, has 25 years experience in designing and manufacturing precise and reliable measurement and control devices. With a wide range of instruments, Bronkhorst High-Tech offers innovative solutions for many different applications in many different markets. The instruments are made to customers’ specification, in various styles, suitable for use in laboratory, industrial environment, hazardous areas, semiconductor or analytical installations. > EX-FLOW series for hazardous areas The Mass Flow Meters of the EX-FLOW series are of rugged design for gas flow applications in hazardous environments. The intrinsically safe measuring head is tested according to ATEX 100a Directive 94/9/EC and approved under EC-Type Examination Number: KEMA 01ATEX1172, protection II 2 G Ex ib IIC T4. This stands for: II 2 G = ATEX group and category Ex ib IIC T4 = CENELEC marking ib = intrinsically safe Zone 1 IIC = highest gas group with a minimum ignition energy of 20 ìJ, with gases such as acetylene or hydrogen T4 = max. surface temperature of 135°C The housing of the electronics compartment is rated to IP65. Mass Flow Meters can be supplied in ranges starting from 0,16…8 mln/min up to 11000 m3 n/h air-equivalent, with pressure rating between vacuum and 700 bar. In combination with control valves, either integrated or separate, Mass Flow Controllers can be offered up to 10…500 m3 n/h air-equivalent. > Mass Flow Controllers for every application The control valve can be furnished as an integral part of an EX-FLOW MFC, or as a separate component. It is a proportional, electromagnetic control valve with fast and smooth control characteristics. With reference to the specific field of application there are different series of control valves. There is a standard direct acting valve for common applications, a pilot operated valve for high flow rates and the so-called Vary-P valve with a pressure rating of 400 or 700 bar, that can cope with up to 400 bar ÄP. These valves will be equipped with explosion proof certified coils. There are two options: Coil XB: protection II 1 G/D Ex ia IIC T6 Coil XC: protection II 2 G/D Ex e mb II T4 The electrical connection of flow meter and control valve to the safe E-7000 readout system (located in the safe zone) is achieved via separate cables. The readout system contains a controller function pc-board to complete the control loop. > General EX-FLOW features u ATEX approval Cat.2, Zone 1 u weatherproof IP65 housing u flow ranges from 0,16…8 mln/min up to 220…11000 m3 n/h u optional: low-ÄP versions up to 4…200 ln/min u pressure ratings up to 700 bar > Fields of application u Process gas measurement or control in (petro-) chemical industries u Fuel cell technology u Gas distribution systems u Hydrogenation processes u Gas consumption measurement for internal accounting u Heating or biogas production EX-FLOW Ex-Proof (ATEX II 2 G) Mass Flow Meters and Controllers for Gases