F U N C T I O N

TM-10-6640-217-13P Millipore Vaccum Pump Model OM 109 Manual
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F U N C T I O N Portable AC-powered source of vacuum (to 365 mm/ 25’’Hg) or pressure (to 4.2 kg/cm²/60 psig) for filtration and other continuous or intermittent laboratory use. The motor and pump are permanently lubricated. Operating noise is low and is further minimized by rubber-cup mounts, and inlet and outlet filter/muffler silencers. All internal surfaces of the pump (except the stainless steel leaf–valves) are Teflon–coated to prevent possible corrosion of the aluminum surfaces. The neoprene diaphragm is also protected with an Armalon cover to prevent attack by chemicals or solvent vapors, thus prolonging its use. However, to prevent excessive amounts of liquids or mist from entering the pump (which could cause faulty or erratic operation) a water trap should be used in conjunction with the pump (please note Fig. 2). O P E R A T I O N The Millipore Vacuum/Pressure Pump is boxed in a condition ready for use. However prior to start-up, please observe the following: 1. Select appropriate hose to be used for desired mode of operation. For pressure, select tubing with a 3/1 6“ to 1/4’ I. D., and wall thickness/wall reinforcement to withstand pressures in excess of 80 psig. For vacuum, select tubing that will withstand vacuum up to 27” Hg. 2. If using the vacuum mode, and carrying out vacuum filtration of liquids, set up a vacuum–flask water trap between the filter holder and the pump unit as shown in Fig. 2. Fig. 2. Second side arm flask connected in series keeps liquid droplets or water vapor out of pump. 3. Prepare desired equipment or filter holder to be employed with pump, then plug electrical cord into the desired electrical receptacle (AC 100V, 115V, 220/240V, depending upon the pump used). 4. Turn on motor by pressing switch mounted on the side of pump unit. Ensure that the pump is under no load when starting, otherwise the pump may not function. If this situation should arise while using the vacuum mode simply break vacuum and after pump begins operation, reconnect tubing and commence vacuum operation. If the pump is used to pressurize a system and this situation occurs, disconnect tubing from tank or equipment to be pressured, and when pump begins operation, reconnect tubing. 2

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