Plant Management
for the continuous, in-phase metering of single or multiple liquid systems at varying rates. Significantly, it is the only pump with two flow adjustment methods-speed and stroke length-that can be used independently or simultaneously to provide optimum performance. For instance, in a process where an ingredient has to be
added accurately to a varying main flow, the proportion can be maintained by speed adjustment, while any corrections necessary to maintain product quality can be made by adjustment adjusting stroke length. The metering pump can be finely tuned to the process system’s requirements. Manual, pneumatic or electric control options are available as are flameproof designs for pumps used in hazardous areas.
Metering technologies Metering/dosing pump technologies fall into three categories: piston/plunger, mechanical diaphragm and hydraulic diaphragm. The basic technology is well proven, and continuing developments through the introduction of new manufacturing processes and materials means that these pumps are keeping pace with the growing and varied requirements of all industry sectors. The standard plunger pump head, consisting of a housing, displacement plunger, seal arrangement, pump valves and suction/discharge side connections, is commonly used where high pressures and high flow rates are encountered. The simple design and small number of components allow a low dead volume and high volumetric efficiency. Mechanically coupled and hydraulically actuated diaphragm
pump heads have been the focus of new developments in metering pump technology. These pump heads are normally
Fig. 2. Multiple pump head arrangement for metering several ingredients.
specified where toxic materials are handled and leak-proof performance is required. As a result of the wider variety of materials that can be used for diaphragms, diaphragm pumpheads are now capable of accommodating hazardous, toxic and dangerous liquids at variable flow rates and pressures. With greater emphasis placed on safety and environmental considerations and as further legislation is introduced, users are increasingly moving towards diaphragm pumps and away from the traditional plunger design. Hydraulically actuated double diaphragm pump heads now incorporate diaphragms made from either PTFE or stainless
Inpro/Seal is the worldwide leader in bearing isolator technology and sysyem reliability. The Inpro/Seal Bearing Isolator protects your rotating applications by excluding contamination and retaining lubricant in the bearing housing. Our non-contacting, non-wearing bearing seal is guaranteed to double your mean time between repair (MTBR).
For more information visit
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Circle 19 or ✔ at
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