DATA SHEET E 081 MINI GAS SAMPLING PUMPS WITH DOUBLE DIAPHRAGM SYSTEM N 86 AN.12DC-B N 816 AV.12DC-B N 838 AN.12DC-B Concept Features Areas of use Double diaphragm pumps from KNF are based on a simple principle: an elastic working membrane and safety membrane are held securely at their edges and moved up and down at their center by an eccentric. As a result, the working membrane moves the medium through automatic valves. The lower lying safety diaphragm provides the working diaphragm with additional security. Pure transfer No contamination of the media due to oilfree operation The double diaphragm pumps offer a high level of performance despite their small size, as well as an excellent price performance ratio. They are required especially in the fields of analysis, process, chemical, fuel cell, production technology and research. The safety membrane has a significantly longer service life than the working diaphragm. The redundant arrangement of the diaphragms ensures that no gas can escape into the environment even if the working diaphragm ruptures. Long product life The KNF modular system permits selection of materials with various levels of gas resistance for parts in contact with gas. Several different motors are available to drive the pump. Please contact us for details. Ready for assembly Maintenance-free Compact size High performance The pumps are used for transferring and sucking gases, taking samples (even liquids in a vacuum), evacuating vessels and compressing gases in process systems and vessels. High level of gas tightness: 6 x 10-4 mbar x l/s Very quiet and little vibration With brushless DC motor Cool running motor even when in constant use, wide range speed controlled motor Can operate in any installed position High security against escape of hazardous or valuable gases Type Delivery (l/min) Vacuum (mbar absolute) N 86 AN.12DC-B 4.5 250 N 816 AV.12DC-B 11 250 N 838 AN.12DC-B 25 200 N 838 AN.12.29DC-B 25 200 atm. Pressure Performance data Pressure (bar g) 1.0 Weight (kg) 0.7 0.6 1.5 0.6 2.5 0.6 2.5 N 86 AN.12DC-B N 816 AV.12DC-B Performance data Performance data Type N 86 AN.12DC-B 1) Delivery at atm. pressure (l/min)1) Max. operating pressure (bar g) Ultimate vacuum (mbar abs.) 4.5 1 250 Type N 816 AV.12DC-B Delivery at atm. pressure (l/min)1) Max. operating pressure (bar g) Ultimate vacuum (mbar abs.) 11 0.6 250 Liter at STP Motor data Motor data Voltage lmax (A) 12 V 0.65 24 V 0.35 N 86 AN.12DC-B 1.1 Pump head Diaphragm Valves Aluminum NBR NBR atm. Press. Type N 816 AV.12DC-B Pressure Vacuum Flow capacity l/min (Liter at STP) Flow capacity l/min (Liter at STP) Vacuum 24 V lmax (A) Pump material Pump material Type Voltage mbar bar g mbar Valves FPM FPM atm. Press. Pressure bar g Pump down time 5 l receiver mbar mbar Diaphragm Aluminum - - - - - - - - for short periods only Pump down time 5 l receiver min Pump head min N 838 AN.12DC-B | AN.12.29DC-B Performance data Type Delivery at atm. pressure (l/min)1) Max. operating pressure (bar g) Ultimate vacuum (mbar abs.) 25 4.9-25 0.6 0.6 200 200 N 838 AN.12DC-B N 838 AN.12.29DC-B 1) Liter at STP Motor data Protection class IP 20 Voltage Power P1 (W) lmax (A) 24 V 46 1.9 Pump material Type Pump head Diaphragm Valves Aluminum NBR NBR N 838 AN... 82 G1/8(2x) 300 10 schwarz / black "-" rot / red "+" 137 144 5±2 Flachbandkabel (nur bei Motoren mit Drehzahlregelung und Signalausgang) Flat Flex Cable (control wires, only at motors with full control) Drehrichtung direction of rotation 137 100 50 13.5 7(2x) 115 38 5.5(4x) 5.5(2x) 71 31 M4 Erdung Grounding Vacuum atm. Press. Pressure Flow capacity l/min (Liter at STP) N 838 AN.12DC-B N 838 AN.12.29DC-B mbar bar g mbar Pump down time 20 l receiver min HINTS ON FUNCTION, INSTALLATION AND TECHNIQUE Function of KNF diaphragm gas sampling pumps The KNF double diaphragm system for increased safety Hints on installation and operation An elastic diaphragm is moved up and down by an eccentric (see illustration). On the down-stroke it draws the air or gas being handled through the inlet valve. On the up-stroke the diaphragm forces the medium through the exhaust valve and out of the head. The compression chamber is hermetically separated from the drive mechanism by the diaphragm. The pumps transfer, evacuate and compress completely oil-free. A second diaphragm is located underneath the working diaphragm. This second diaphragm is under less mechanical stress when the pump is operating. If gas should leak at the working diaphragm, it will still remain inside the pump space. ■■ Range of use: Transferring air and gases at temperatures between +5 °C and +40 °C. Diaphragm pump The user can monitor the closed space between the two diaphragms in order to immediately detect any damage to the working diaphragm that may occur during a process, for example. For this, the factory will add an additional connection or access point into the closed space upon request. Double diaphragm pump ■■ Permissible ambient temperature: between +5° C and +40 °C. ■■ Please check the compatibility of the materials of the pump head, diaphragm and valves with the medium. ■■ The KNF product line contains pumps suitable for pumping aggressive gases and vapors - please contact us. ■■ The standard pumps are not suitable for use in areas where there is a risk of explosion. In these cases there are other products in the KNF program - please ask us for details. ■■ The pumps are not designed to start against pressure or vacuum; when a pump is switched on the pressure in the suction and pressure lines must be atmospheric. Pumps that start against pressure or vacuum are available on request. ■■ To prevent the maximum operating pressure being exceeded, restriction or regulation of the air flow should only be carried out in the suction line. ■■ Components connected to the pump must be designed to withstand the pneumatic performance of the pump. ■■ Install the pump so that the fan can draw in sufficient cooling air. ■■ Fit the pump at the highest point in the system, so that condensate cannot collect in the head of the pump - that prolongs working-life. KNF Neuberger GmbH Pumps + Systems KNF reserves the right to make technical changes. KNF 05/2014 (Produced in Germany) Alter Weg 3 D-79112 Freiburg, Germany Tel. +49 7664 5909 0 Fax +49 7664 5909 99 [email protected] www.knf.de
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