Diaphragm Vacuum Pumps

Transcription

1 Operating and Installation Instructions Diaphragm Vacuum Pumps Type ranges: N 836 APE N 836 AP.40 E N APE N AP.40 E Fig. 1: N AP.40 E You have selected a high-quality KNF product; the following tips will help you operate it safely, and reliably over a long period of time. Carefully study the operating and installation instructions before using the pumps and observe at all times the relevant instructions to avoid dangerous situations. The manual was produced for the serial pumps stated above. With customer-specified projects (pump types starting with PJ or PM ) there could be differences in detail. For customer-specified projects please therefore take into account any agreed technical specifications, as well as these instructions. List of Contents KNF Neuberger GmbH Alter Weg 3 D Freiburg Germany Phone +49/(0)7664 / Fax +49/(0)7664 / info@knf.de Page Description, Operating Conditions... 2 Safety... 4 Installation... 6 Operation... 7 Servicing... 9 Cleaning Trouble Shooting Spare parts Tables Returns Health and safety clearance and decontamination form KNF /14 Translation of original Operating and Installation Instructions, english

2 Description, Operating Conditions Diaphragm Vacuum Pumps N Description, Operating Conditions Pumps in the N 836 range have been specially designed to meet the requirements of vapour sterilisation and vacuum drying. The following versions are available: Basic models: pump types N 836 APE and N APE. Versions with integral venting valve: pump types N 836 AP.40 E and N AP.40 E. The pump head is aerated at regular intervals initiated by the control system of the autoclave or drying cabinet, but, at the same time, vacuum is maintained in the sterilisation chamber. In this way, condensate that has collected in the pump head is blown out. Versions with integral venting valve and cooling system (water cooling): on a project basis. Water cooling of the pump heads enables the evacuation time to be even shorter. KNF pumps in the N 836 range transfer and evacuate 100% oilfree. In operation they are gas-tight, and maintenance-free Electrical Equipment See the type-plate for full electrical data of the motor. For all pumps with venting valves: the venting valve operates on a 24V DC supply (without power closed). The protection class of standard versions is IP00. The motors used are fitted as standard with a thermal switch to protect against overloading. 2 Translation of original Operating and Installation Instructions, English, KNF /14

3 Diaphragm Vacuum Pumps N 836 Description, Operating Conditions 1.2. Operating Conditions Handling air, gases, and vapours at temperatures between + 5 C C. For maximum permissible operating pressure, ultimate vacuum, and flow capacity see section 10. The pumps must not be used in areas where there is a danger of explosion. Before pumping a medium, the compatibility of materials of pump head, diaphragm and valves with the medium must be checked (for pump materials: see section 10). Versions with integral venting valve: The pumps must not be used if the entry of air into the pump during venting could result in the creation of reactive, explosive or otherwise hazardous mixtures. KNF pumps in the N 836 range must not be used for liquids. You will find suitable liquid pumps in our Product Program. If your potential application lies outside the above limits discuss it with our technical adviser (see last page for contact telephone number) Ambient Conditions When the pump is operating the following ambient conditions must be maintained: Ambient temperature during operation: between + 5 C + 40 C. The pump must be protected from the effects of dust and water. The pump must not be used in areas where there is a danger of explosion. During operation an adequate supply of air for cooling must be provided Pump materials See section 9. Translation of original Operating Instructions, English, KNF /14 3

4 Safety Diaphragm Vacuum Pumps N 836 EC Directives / Standards 2. Safety The standard pumps have Protection Class 00, and so offer no protection against contact or foreign bodies. It is therefore essential to protect personnel against contact with live parts (e.g. electrical connections, motor windings), and moving parts (e.g. fan). Protection against the ingress of particulate matter must also be provided. The pump is not protected against water. In this case too, as far as is relevant, measures to protect the pump must be taken before putting it into service. Note that the pumps may only be used for their intended purpose. The pumps must not be used in areas where there is a danger of explosion. Versions with integral venting valve: The pumps must not be used if the entry of air into the pump during venting could result in the creation of reactive, explosive or otherwise hazardous mixtures. Prior to any use of the pump ensure that the creation of reactive, explosive or otherwise hazardous mixtures during the supply of air is prevented. The pumps are not suitable for aggressive media. Components connected to the pump must be designed to withstand the pneumatic performance of the pump. Take care that safety regulations are observed when connecting the pump to the electricity supply. When the operation of the pump is interrupted by the thermal switch, the pump will re-start automatically after cooling down. Take all care necessary to prevent this leading to a dangerous situation. Specific safety instructions for the media being handled must be observed. Use only original KNF spare parts. For the purposes of the Machinery Directive 2006/42/EC, pumps are partly completed machinery, and are therefore to be regarded as not ready for use. Partly completed machinery may not be commissioned until such time as it has been determined that the machine in which the partly completed machinery is to be assembled is in conformity with the provisions of the Machinery Directive 2006/42/EC. The following essential requirements of Annex I of Directive 2006/42/EC (general principles) are applied and observed: General Principles No. 1 No / / / / / / / / / / / / As these partly completed machinery are OEM-models the power supplies and the equipment for disconnecting and switching-off the partly completed machinery respectively have to be considered 4 Translation of original Operating and Installation Instructions, English, KNF /14

5 Diaphragm Vacuum Pumps N 836 Safety when mounting as well as over-current and overload protective gear. In addition a protection against mechanical parts in motion and hot parts, if existing, has to be provided when mounting. The pumps conform to the Directive 2011/65/EU (RoHS2). The pumps conform to the EC Directive 2004/108/EC concerning Electromagnetic Compatibility. The following harmonized standards have been used: DIN EN /2 DIN EN /3 DIN EN Translation of original Operating Instructions, English, KNF /14 5

6 Installation Diaphragm Vacuum Pumps N 836 Mechanical Electrical Pneumatic Water cooling 3. Installation The pumps are OEM models intended for installation in equipment. When installing them make certain that accident prevention regulations, and safety instructions, including those for subsequent operation are observed. The safety instructions in section 2 must be observed. The dimensions of the mountings are given in Data Sheet E 180. 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. When making the electrical installation the safety regulations must be observed. In particular make sure that the electricity supply is isolated before trying to connect the pump. Compare the supply data with the data on the motor-plate. The voltage must not vary by more than +10% and -10% from that shown on the type-plate. The motor must be connected to earth (ground) wire. In the electrical installation, arrangements (complying with EN ) must be made for disconnecting the pump motor from the electrical supply. The pump must be installed so that contact with live parts is impossible. We recommend that a fuse is installed in the motor supply circuit; the operating current is given in Data Sheet E 180. Pump types N 836 AP.40 E and N AP.40 E: the venting valve must be electrically connected to the control system of the autoclave or drying cabinet (for connection values, see Section 1.1). These units then control operation of the valve. Remove the protection plugs from the port threads. Connect the suction and pressure lines. Arrange the suction and pressure lines so that condensate cannot run into the pump. Project pumps with water cooling: the water supply and drain lines must be connected to the pump heads. KNF recommends that the direction of flow of the cooling water should be the same as the gas flow through the heads (see markings on the pump heads). 6 Translation of original Operating and Installation Instructions, English, KNF /14

7 Diaphragm Vacuum Pumps N 836 Operation 4. Operation Specific safety instructions for the media being handled must be observed. The pumps must not be used in areas where there is a danger of explosion. Versions with integral venting valve: The pumps must not be used if the entry of air into the pump during venting could result in the creation of reactive, explosive or otherwise hazardous mixtures. Prior to any use of the pump ensure that the creation of reactive, explosive or otherwise hazardous mixtures during the supply of air is prevented. If combustible media are used: Hazard of fires and explosions due to excessively high media temperature. Be aware that the pumps are not designed to be explosion-proof. Make sure the temperature of the medium is always sufficiently below the ignition temperature of the medium, to avoid ignition or explosion. This also applies for unusual operational situations. Note that the temperature of the medium increases when the pump compresses the medium. Hence, make sure the temperature of the medium is sufficiently below the ignition temperature of the medium, even when it is compressed to the maximum permissible operating pressure of the pump. The maximum permissible operating pressure of the pump is stated in the technical specifications (section 10). If necessary, consider any external sources of energy, such as radiation, that may add heat to the medium. In case of doubt, consult the KNF customer service. Before pumping a medium, the compatibility of materials of pump head, diaphragm and valves with the medium must be checked (for pump materials: see section 10). The pump must not start against pressure or vacuum. When it is switched on the pressure in the suction and pressure lines must be atmospheric. This must be so even when the pump restarts after the power has been cut off for a short period. The maximum permissible operating pressure (see section 10) must not be exceeded. To prevent the maximum permissible operating pressure being exceeded, restriction or control of the air or gas flow should only be carried out in the suction line. Translation of original Operating Instructions, English, KNF /14 7

8 Operation Diaphragm Vacuum Pumps N 836 If restriction or control of the air or gas flow is made on the pressure side ensure that the maximum permissible operating pressure is not exceeded. When the pump is at a standstill the inlet and exhaust must be at normal atmospheric pressure. When the operation of the pump is interrupted by the thermal switch, the pump will re-start automatically after cooling down. Take all care necessary to prevent this leading to a dangerous situation. Diaphragm and valve plates are the only parts subject to wear. Wear is usually indicated by a drastic reduction in the pneumatic performance. When replacing parts proceed as described in section 5. Ambient conditions: see section 1.3. KNF recommends that, at the end of an evacuation operation, the pump should be allowed to run for a few minutes to remove condensate from the pump heads. 8 Translation of original Operating and Installation Instructions, English, KNF /14

9 Diaphragm Vacuum Pumps N 836 Servicing 5. Servicing Diaphragm and valve plates are the only parts of the pump subject to wear. They are simple to change. Always change diaphragms, valve plates and sealing rings at the same time. In the case of models with two heads service both heads at the same time One-headed pumps Before working on the pump isolate the power supply securely, then check that the lines are not live. Parts required Spare part Quantity Structured diaphragm 1 Valve plates 2 Tab. 1: Spare parts *According to Spare parts list, section 8 Tools required Type range Tools/Material All Phillips screwdriver No. 2 Screwdriver blade width 3.0 mm (or similar size) Felt-tip marker Tab. 2: Tools Change the structured diaphragm and valve plates in the following sequence: a) Preparatory steps b) Removing pump head c) Changing structured diaphragm d) Changing valve plates e) Refitting pump head f) Final steps Proceed as follows (see figs. 2 and 3): Translation of original Operating Instructions, English, KNF /14 9

10 Servicing Diaphragm Vacuum Pumps N 836 Fig. 3: Pump Specification Pos Description Fig. 2: Cross section of pump head 1 Recessed head screw 2 Recessed head screw 3 Ribbed plate 4 Intermediate plate 5 Adapter 6 Intermediate flange 7 Structured diaphragm 8 Diaphragm spacer 9 Disc 10 Spacer ring 11 Foam-plastic insert 1 12 Foam plastic insert 2 13 Valve plate 19 Venting valve* 20 Cover of motor fan 21 Slot of cover of motor fan * only pump types N 836 AP.40 E, N AP.40 E, a) Preparatory steps 1. Remove fan cover (20) from pump housing; to do this insert a screwdriver into the slots (21) and open the snaps. b) Removing pump head 1. Mark the position of ribbed plate (3), intermediate plate (4), and adapter (5) relative to each other by a drawing line with a felttip marker. This is to ensure that the parts will be reassembled in correct position at a later stage. 2. Undo the 4 screws (1) in the ribbed plate (3). Do not undo the screws (2)! 3. Carefully remove ribbed plate (3) with intermediate plate (4). 10 Translation of original Operating and Installation Instructions, English, KNF /14

11 Diaphragm Vacuum Pumps N 836 Servicing c) Changing structured diaphragm 1. Turn the fan to bring the structured diaphragm (7) to its highest position. In this position there is good access to the structured diaphragm. 2. Carefully lift the edge of the structured diaphragm (7) and, gripping it on opposite sides, unscrew it anti-clockwise using both hands. 3. Replace all diaphragm spacer(s) (8) onto the screw thread of the new structured diaphragm. 4. Check that all parts are free from dirt and clean them if necessary (see section 6. Cleaning). 5. Screw the new structured diaphragm, complete with diaphragm spacers (8) into the connecting rod (clockwise) and tighten it by hand. Take care that the disc (9) is seated on the spacer ring (10), and that the foam-plastic inserts (11) and (12) (different sizes) are in position. d) Changing valve plates 1. Undo the two screws (2) in the ribbed plate (3). 2. Separate ribbed plate (3) from intermediate plate (4). 3. Remove valve plates (13) from intermediate plate (4). 4. Check that the valve seats in the ribbed plate and intermediate plate are clean. If damages, distortion, or corrosion are evident on these parts they should be replaced. 5. Lay the new valve plates (13) in the recesses in the intermediate plate (4). The valve plates for suction and pressure sides are identical, as are upper and lower sides of the plates. A tab ensures correct location of the valve plates. e) Refit the pump head 1. Place the intermediate plate (4) with valve plates (13) on the adapter (5) in the position indicated by the marking. The marking ensures that the orientation of the intermediate plate is correct. 2. Place the ribbed plate (3) on the intermediate plate (4) in the position indicated by the marking. 3. Screw in the 2 screws (2) (with disc springs) until the screw heads are just seated - that is to say, until the first resistance is felt, do not tighten them fully. 4. Gently tighten the screws (1), evenly and diagonally. 5. Turn the fan to check that the pump rotates freely. 6. Now tighten screws (1) diagonally (hand-tight). 7. Tighten the screws (2) another half-turn each. Translation of original Operating Instructions, English, KNF /14 11

12 Servicing Diaphragm Vacuum Pumps N 836 f) Final steps 1. Refit cover of motor fan (20). If you have any questions about servicing call our technical adviser (see last page for contact telephone number). 12 Translation of original Operating and Installation Instructions, English, KNF /14

13 Diaphragm Vacuum Pumps N 836 Servicing 5.2. Two-headed pumps Before working on the pump isolate the power supply securely, then check that the lines are not live. Parts required Spare part Quantity Structured diaphragms 2 Valve plates 4 Tab. 3: Spare parts *According to Spare parts list, section 8 Tools required Type range Tools/Material All Phillips screwdriver No. 2 Screwdriver blade width 3.0 mm (or similar size) Felt-tip marker Tab. 4: Tools Change the structured diaphragm and valve plates in the following sequence: a) Preparatory steps b) Removing pump head c) Changing structured diaphragm d) Changing valve plates e) Refitting pump head f) Final steps Proceed as follows (see figs. 2 and 3): a) Preparatory steps 1. Remove fan cover (20) from pump housing; to do this insert a screwdriver into the slots (21) and open the snaps. b) Removing pump heads 1. At both pump heads: Mark the position of ribbed plate (3), intermediate plate (4), and adapter (5) relative to each other by a drawing line with a felt-tip marker. This is to ensure that the parts will be reassembled in correct position at a later stage. 2. At both pump heads: Undo the 4 screws (1) in the ribbed plate (3). Do not undo the screws (2)! 3. Carefully lift off both ribbed plates (3) with intermediate plates (4). Translation of original Operating Instructions, English, KNF /14 13

14 Servicing Diaphragm Vacuum Pumps N 836 c) Changing structured diaphragms 1. Turn the fan to bring one structured diaphragm (7) to its highest position. In this position there is good access to the structured diaphragm. 2. Carefully lift the edge of the structured diaphragm (7) and, gripping it on opposite sides, unscrew it anti-clockwise using both hands. 3. Replace all diaphragm spacer(s) (8) onto the screw thread of the new structured diaphragm. 4. Check that all parts are free from dirt and clean them if necessary (see section 6. Cleaning). 5. Screw the new structured diaphragm, complete with diaphragm spacers (8) into the connecting rod (clockwise) and tighten it by hand. Take care that the disc (9) is seated on the spacer ring (10), and that the foam-plastic inserts (11) and (12) (different sizes) are in position. 6. Carry out steps 1 to 5 for the second pump head. d) Changing valve plates 1. For one pump head: Undo the two screws (2) in the ribbed plate (3). 2. Separate ribbed plate (3) from intermediate plate (4). 3. Remove valve plates (13) from intermediate plate (4). 4. Check that the valve seats in the ribbed plate and intermediate plate are clean. If damages, distortion, or corrosion are evident on these parts they should be replaced. 5. Lay the new valve plates (13) in the recesses in the intermediate plate (4). The valve plates for suction and pressure sides are identical, as are upper and lower sides of the plates. A tab ensures correct location of the valve plates (see figure 3). 6. Carry out steps 1 to 5 for the second pump head. e) Refit the pump heads 1. At both heads: Place the intermediate plate (4) with valve plates (13) on the adapter (5) in the position indicated by the marking. The marking ensures that the orientation of the intermediate plate is correct. 2. Place the both ribbed plates (3) on the intermediate plates (4) in the position indicated by the markings. 3. At both pump heads: Screw in the 2 screws (2) (with disc springs) until the screw heads are just seated - that is to say, until the first resistance is felt, do not tighten them fully. 4. Gently tighten on both pump heads the screws (1), evenly and diagonally. 14 Translation of original Operating and Installation Instructions, English, KNF /14

15 Diaphragm Vacuum Pumps N 836 Servicing 5. Turn the fan to check that the pump rotates freely. 6. Now tighten on both pump heads screws (1) diagonally (handtight). 7. At both pump heads: Tighten the screws (2) another half-turn each. f) Final steps 1. Refit cover of motor fan (20). If you have any questions about servicing call our technical adviser (see last page for contact telephone number). Translation of original Operating Instructions, English, KNF /14 15

16 Cleaning Diaphragm Vacuum Pumps N Cleaning When changing valve plates and diaphragm, inspect all parts for dirt before assembling the pump head, and clean them if necessary. If a compressed air line is available, blow the parts out with it. 16 Translation of original Operating and Installation Instructions, English, KNF /14

17 Diaphragm Vacuum Pumps N 836 Trouble Shooting 7. Trouble Shooting Before working on the pump isolate the power supply securely, then check that the lines are not live. The following tips for fault-finding are best employed in the sequence shown. Pump produces no flow Connections or lines are blocked An external valve is closed, or a filter blocked. Liquid (condensate) has collected in the pump head. Let the pump run for a few minutes pumping air (if necessary for safety reasons: pumping an inert gas.) Install the pump at the highest point in the system. Diaphragms or valve plates are worn. Section 5 Servicing. Flow, pressure, or vacuum too low Compare the actual performance with the figures in section 10 or the data sheet. Liquid (condensate) has collected in the pump head. Let the pump run for a few minutes pumping air (if necessary for safety reasons: pumping an inert gas). Install the pump at the highest point in the system. There is pressure on the pressure side, and at the same time vacuum, or a pressure above atmospheric, on the suction side. The pump is not designed for this condition. The cross-section of pneumatic lines, or connected components is too small, or they are restricted. To measure the performance, disconnect the pump from the system (small diameter tubing or a valve can significantly affect performance). There is a leak at a connector, in a line, or in the pump head. For pump types N 836 AP.40 E and N AP40. E as well as for pump types with water cooling (project pumps): The seal in the ventilating valve is defective. Change seal (see section 8 Spare Parts for correct seal). Translation of original Operating Instructions, English, KNF /14 17

18 Trouble Shooting Diaphragm Vacuum Pumps N 836 Diaphragm or valve plate are worn, or dirt is in the head: Section 5 Servicing. If the pump does not operate properly and you cannot find any of the above faults, send it to the KNF Service Department. In order for KNF to repair the pump, the customer must provide a statement on the media which were pumped and on pump cleaning. Please fill out the corresponding KNF form, and submit it together with the pump. A sample statement for copying can be found in section 11 of these operating instructions. 18 Translation of original Operating and Installation Instructions, English, KNF /14

19 Diaphragm Vacuum Pumps N 836 Spare parts 8. Spare parts Pos. Bezeichnung Order-No. No.* 7 Structured diaphragm Valve plate Seal for venting valve (EPDM) Tab. 5: Spare parts *according to figs. 3 and 4 9. Tables Pump type Max. permissible operating pressure (bar g) Ultimate vacuum (mbar abs.) N 836 APE N APE N 836 AP.40 E N AP 40 E Delivery rate* (l/min) at atm. pressure Tab. 6: Pneumatic Data *Litre at STP Technical data apply to all pump models: Material Pump head Alumium alloy anodized and coated; PPS Tab. 7: Pump materials Structured Valve plates Venting valve* diaphragm EPDM EPDM Stainless steel, EPDM ** not pump types N 836 APE and N APE Translation of original Operating Instructions, English, KNF /14 19

20 Returns Diaphragm Vacuum Pumps N Returns Pumps and systems used in laboratories and process-based industries are exposed to a wide variety of conditions. This means that the components contacting pumped media could become contaminated by toxic, radioactive, or otherwise hazardous substances. For this reason, customers who send any pumps or systems back to KNF must submit a Health and safety clearance and decontamination form in order to avoid a hazardous situation for KNF employees. This Health and safety clearance and decontamination form provides the following information, among other things: physiological safety whether medium-contacting parts have been cleaned whether the equipment has been decontaminated media that have been pumped or used and must declare physiological safety. To ensure worker safety, work may not be started on pumps or systems without a signed Health and safety clearance and decontamination form. For optimal processing of a return, a copy of this declaration should be sent in advance via , regular mail, or fax to KNF Customer Service (refer to final page for address). In order to avoid endangering employees who open the shipment's packaging, despite any residual hazards, the original version of the Health and safety clearance and decontamination form must accompany the delivery receipt on the outside of the packing. The template for the Health and safety clearance and decontamination form is included with these Operating Instructions and may also be downloaded from the KNF website. The customer must specify the device type(s) and serial number(s) in the Health and safety clearance and decontamination form in order to provide for the unambiguous assignment of the Declaration to the device that is sent to KNF. In addition to the customer's declaration of physiological safety, information about operating conditions and the customer's application are also of importance to ensure that the return shipment is handled appropriately. Therefore, the Health and safety clearance and decontamination form requests this information as well. 20 Translation of original Operating and Installation Instructions, English, KNF /14

21 Diaphragm Vacuum Pumps N 836 Health and safety clearance and decontamination form 11. Health and safety clearance and decontamination form Translation of original Operating and Installation Instructions, english, KNF /14 21

22 Benelux Netherlands KNF Verder B.V. Utrechtseweg 4a NL-3451 GG Vleuten Tel (0) Fax 0031 (0) Benelux Belgium, Luxembourg KNF Verder N.V. Kontichsesteenweg 17 B-2630 Aartselaar Tel (0) Fax 0032 (0) China KNF Neuberger Trading (Shanghai) Co., Ltd No. 36 Lane 1000 Zhang Heng Road Shanghai , P.R. China Tel (0) Fax 0086 (0) Germany KNF Neuberger GmbH Alter Weg 3 D Freiburg Tel (0) Fax 0049 (0) info@knf.de France, Morocco, Algeria KNF Neuberger 4, Bld. d Alsace Z.I. F Village-Neuf Tel (0) Fax 0033 (0) info@knf.fr KNF worldwide Great Britain KNF Neuberger U.K. Ltd. Avenue 2 Station Lane Industrial Estate Witney Oxon OX28 4FA Tel (0) Fax 0044 (0) info@knf.co.uk India KNF Pumps + Systems (India) Pvt. Ltd. RAJIV GANDHI INFOTECH PARK Phase 1 Ganga Estate, Survey No. 152/2/2 Above AXIS BANK Hinjewadi Pune Tel (0) (0) Fax 0091 (0) info@knfpumps.in Italy KNF ITALIA S.r.l. Via Flumendosa, 10 I Milano Tel Fax info@knf.it Japan KNF Japan Co.Ltd. Across Shinkawa Bldg. Annex 3F Shinkawa, Chuo-ku, Tokyo, Japan Tel (0) Fax 0081 (0) info@knf.co.jp Korea KNF Neuberger Ltd. Woosan Bldg.RM#202, 336-4, Hwikyung-Dong Dongdaemun-Ku., , Seoul Tel (0) /6 Fax 0082 (0) knf@knfkorea.com KNF product centres Sweden, Denmark, Finland, Norway KNF Neuberger AB Mejerivägen 4, P.O. Box SE Stockholm Tel (0) Fax 0046 (0) info@knf.se Switzerland Sales KNF Neuberger AG Stockenstrasse 6 CH-8362 Balterswil Tel (0) Fax 0041 (0) knf@knf.ch Taiwan KNF Neuberger Ltd. 9-2 FL., No., 24, Lane 123, Section 6, Ming Chuan East Road Taipei City, Taiwan Tel Fax knftwn@knftwn.com.tw USA, Canada, South America KNF Neuberger, Inc. Two Black Forest Road Trenton, New Jersey Tel. 001 (609) Fax 001 (609) knfusa@knf.com South America Direct Phone: gb@knf.com Product centre for gas pumps: Germany KNF Neuberger GmbH Alter Weg 3 D Freiburg Phone 0049(0) Fax 0049(0) info@knf.de Product centre for fluid pumps: Switzerland KNF FLODOS AG Wassermatte 2 CH-6210 Sursee Phone 0041(0) Fax 0041(0) info@knf-flodos.ch Product centre for micro pumps: Switzerland KNF Micro AG Zelglimatte 1b CH-6260 Reiden Tel. 0041(0) Fax 0041(0) info@knf-micro.ch