Data Sheet Air Driven Diaphragm Pump

Air driven diaphragm pumps Seybert & Rahier sera - Air driven diaphragm pumps are cost-effective, leakage-free displacement pumps for flow capacities up to approx. 51 m3/h. They are driven by dry, non-lubricated compressed air. Application Free-flowing chemicals with aggressive, odorous, abrasive, flammable, viscous or toxic properties. Advantages ? cost-effective ? leakage-free ? safe against overpressure ? low-maintenance continuous duty ? design according to ATEX ? safe to run dry ? dry priming ? adjustable flow capacity ? high-quality materials ? robust ? silicone-free Air driven diaphragm pumps Seybert & Rahier Design and Functioning An air control valve supplies the air chambers behind the diaphragms alternately with compressed air. One diaphragm is pressed to the front (= pressure stroke) while the other one is pulled backwards (= suction stroke). The special design of the air control valve ensures that the pumps can always be approached safely, i.e. that there are no undesirable standstills. The valve balls open and close in the stroke rhythm of the diaphragms. Materials The medium-contacting parts can be supplied in a great variety of different materials. Material-combinations coordinated with the application make the pumps suitable also for critical dosing media. Materials available Pump body: PP, ECTFE, AISI 316, Aluminium Diaphragms: PTFE, NBR, EPDM, Hytrel, Santoprene Valve balls: PTFE, AISI 316, glass, EPDM Valve seats: PP, PVDF, ECTFE, AISI 316, AISI 304, PE, PPS-V Valve seals: EPDM, FPM (Viton), PTFE, NBR, Silicone Drive housing: PP with glass fibre content, PP with carbon fibre content Compressed air Sucking Feeding Pressure line Valve ball Pressure valve Diaphragms Pressure plate Pump body Drive housing Air control valve Suction valve Suction line Air driven diaphragm pumps Seybert & Rahier APB – Series ( II 3G EEx c IIBT4 ) Pump type Max. flow capacityltr./min. Max. operating pressure bar Max. suction headm (dry / wet) APB – 5 5 7 3 / 7APB – 15 15 7 3 / 7APB – 30 30 7 5 / 7APB – 45 45 7 5 / 7APB – 90 90 7 5 / 7APB – 100 100 7 5 / 7APB – 150 150 7 5 / 7APB – 200 200 7 5 / 7APB – 340 340 7 5 / 7APB – 650 650 7 4 / 7APB – 850 850 7 5 / 7 APE – Series ( II 2G EEx c IIBT4 ) Pump type Max. flow capacityltr./min. Max. operating pressure bar Max. suction headm (dry / wet) APE – 5 5 7 3 / 7APE – 15 15 7 3 / 7APE – 30 30 7 5 / 7APE – 45 45 7 5 / 7APE – 90 90 7 5 / 7APE – 100 100 7 5 / 7APE – 150 150 7 5 / 7APE – 200 200 7 5 / 7APE – 340 340 7 5 / 7APE – 650 650 7 4 / 7APE – 850 850 7 5 / 7 max. air control pressure for all types: 7 bar The control air must be dry and free from oil or solids. The sera air driven diaphragm pumps are to be designed on the basis of the performance characteristics as shown in the data sheets. In order to achieve an optimum service life and performance the parameters for normal operation of the pumps should be around the middle of the performance diagram. Solids contents and viscosity of the dosing medium will reduce the flow capacity. Air driven diaphragm pumps Seybert & Rahier Subject to technical modifications 97/06 en 07/07 sera Dosing Feeding Compressing Seybert & Rahier GmbH + Co. Betriebs - KG sera-Straße 1 · D-34376 Immenhausen Tel. + 49 56 73 99 90 Fax. + 49 56 73 99 91 55 e-mail: info@sera-web.de Internet: www.sera-web.de sera – representative:Accessories Pulsation damper series MPD ensure a relatively smooth flow and elimi-nate pressure peaks which may lead to undesired vibrations in the pipe system. Compressed air supply units are offered for all sera air driven diaphragm pumps. They consist in the main of a filter pressure controller, shut-off valve, check valve and the required fittings incl. 5 m pneumatic hose. With the help of the filter pressure reducer the control air pressure can be adapted to the operating pressure and the optimum operating point of the pump can be set. Stroke transmitting devices can be integrated in the drive housing with a number of pumps. They emit a signal per each performed pump stroke which is electrically evaluated. This way sera air driven diaphragm pumps can be used also for batch dosing purposes. (non applicable to type APB-650 and APB-850) Further accessories on request. Proximity switch