Piston Pump User Manual - Diener Precision Pumps
Contents
1. 7 Diener Precision Pumps Piston Pump User Manual Introduction Welcome to the world of precision fluid delivery Diener Precision Pumps is recognized worldwide as the leader in low flow fluid transfer with designs that combine simplicity reliability and accuracy Our Swiss manufacturing techniques represent the best available combination of craftsmanship and technical expertise Before using one of our products take a moment to read through this manual It will give you a brief overview of pump terminology a definition of the pump components and some tips to ensure successful operation of the pump Please understand that the user must take full responsibility for his her safety when using and applying Diener products If you have any doubts about pump operation or safety contact our customer service representatives Customer Support Phone 41 44 866 7272 Switzerland 1 209 365 0405 USA E mail info dienerprecisionoumps com www dienerprecisionoumps com Warning Mis use of this product can result in serious injury and death Do not operate this product outside the pressure temperature and material limits set forth in this manual and the pump s individual specification sheet Table of Contents l Definition of Terms and Pump Components II Installation IIl Operating Guidelines IV Specifications V Troubleshooting Piston Pump User Manual Version 03 09 13 Page 1 5 7 Diener Precision Pumps Defini2. g Loose connector Connection polarity not correct Polarity reversed Version 03 09 13 and or closed valves Try to free the piston by turning it gently lf this does not work remove the pump from the bracket and soak it in warm soapy water for 5 10 minutes then try to turn it If the problem persists consult the factory Slow the motor speed Check the lines for obstructions and or closed valves Check the fitting seals and or retighten Lower the motor speed Raise the lines individually to remove pockets of air this may take time depending on the total volume within the lines Reduce the load on the pump Let the motor cool then check the motor driver to ensure it conforms to the limits of the motor nameplate also see the specification sheet provided separately Unplug then reattach the connector Verify that sensor is connected properly Reconfigure the motor wiring to run in the opposite direction see specification sheet Page 5 5
3. he expansion can cause structural and seal damage Pressure Do not over pressurize the pump refer to the upper limits provided in the specification sheet Failure to do so may damage the pump and cause serious injury Chemical Attack Expose the pump only to chemicals that are known to be compatible with the wetted materials in the pump refer to specification sheet for a wetted materials list Use protective clothing whenever handling dangerous fluids and follow the recommendations in the fluid s material safety data sheet MSDS Immersion Do not immerse the pumps in water and under no circumstances should the motor be exposed to water could result in injury or death IV Specifications Please refer to the individual pump data sheet for technical and dimensional specifications Piston Pump User Manual Version 03 09 13 Page 4 5 7 Diener Precision Pumps V Troubleshooting Possible Cause Solution SS a a Pump does not pump No power Restriction in the lines Check motor power Check the lines for obstructions Pump makes a clicking or popping sound once revolution Bubbles are present in the inlet outlet Pump stalls at high temperature Rotational sensors do not work correctly Pump spins backwards Piston Pump User Manual The piston is stuck Pump is cavitating Pump outlet is blocked Leaking fittings Pump is cavitating Air is trapped within the system Motor overheatin
4. ng the connection For motors supplied with separate speed control and tachometer leads please follow the color coding information Failure to do so may result in permanent motor damage and or fire Piston Pump User Manual Version 03 09 13 Page 3 5 7 Diener Precision Pumps lll Operating Guidelines When starting the pump allow it to run for a brief period to remove all air in the lines The displacement stroke volume is typically very low so air removal may take a long time depends on total volume of air in the system For best results the pump outlet should be exiting vertically The pump is reversible reversing the motor rotation direction will reverse the flow direction These pumps have a very small clearance between the piston and cylinder To minimize the possibility of the piston sticking in the cylinder we recommend that the fluid be filtered to 2 microns and that the piston be kept in the fully in position whenever the pump is shut off for long periods of time If the pump is removed from service rinse the pump thoroughly and cover the ports with a suitable plug to prevent the surfaces from drying If the fluid dries and crystallizes the pump will need to be cleaned see section V of this manual For detailed information about the operating limits of the pumps please refer to the pump specification sheet Other guidelines to follow include Temperature Do not allow fluid to freeze in the pump t
5. tion of Terms and Pump Components Fluid Terms Viscosity Differential Pressure Static Case Pressure Flow rate Fluid Temperature Ambient Air Temperature Mixed Phase Pump Terms Cavitation Self priming Dry running Starved Accuracy Precision cV Sticking the relative thickness of the fluid higher viscosity thicker fluid the relative difference between the outlet and inlet of the pump the pressure boost provided by the pump the pressure inside the pump when the pump is turned off the flow through the pump usually expressed in milliliters minute the temperature of the fluid in the pump the temperature of the environment outside the pump the fluid contains a combination of gas and liquid vapor bubbles that form when the pressure falls below the vapor pressure of the fluid a pumps ability to prime itself the period of time during which a pump can run dry without damage the pump inlet is starved for fluid usually due to an inlet restriction or no priming flow comparison of the average dispensed value with the actual dispensed value repeatability of the dispensed value coefficient of variation defined as the standard deviation divided by the mean value for a group of samples the term used to describe a piston that will not move in the cylinder Version 03 09 13 Piston Pump User Manual Page 2 5 7 Diener Precision Pumps ll Installation 1 Handle the p
6. ump carefully Hard impacts or rough handling can damage the fittings and or loosen the pump from its base 2 Particulates in the fluid can harm the pump We recommend that the fluid be filtered using a 2 micron or smaller filter mesh 3 For pumps fitted with tapered NPT port threads use a suitable liquid thread sealer or Teflon tape For pumps with 14 28 UNF threads tighten the fittings hand tight only Tubes should always be secured to the fitting using a locking clamp Example of 4 28 UNF bottom sealing fitting Example of pump with rinse ports at rear of bottom and face sealing fitting top pump note hose clamps have been removed for photo clarity 4 Ifthe pump is fitted with rinse ports photo above right install tube fittings as shown and follow the pressure guidelines shown on the pump specification sheet 5 The piston pumps can be run dry for short periods of time but to improve the pump s priming ability we recommend wetting the pump s internal surfaces before startup 6 If your pump is equipped with a rotational sensor connect the leads as shown on the pump specification sheet Failure to do so could result in permanent damage to the sensor Optical Sensor Hall Sensor 7 All electrical connections should be carried out by individuals qualified according to local electrical installation regulations The electrical supply should match the motor nameplate values all power should be turned off prior to maki
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