by DAVIS INSTRUMENTS
Buy new: $315.00
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These horizontal polypropylene magnetic drive centrifugal pumps feature carbon bushings that allow extended run-dry ability. The NPT connections ensure easy installation into your piping system. The modified concentric volute minimizes radial loads and distributes pressure evenly across the entire flow range for improved reliability. The thrust balance system has generous balance holes and rear sealing ring to reduce axial thrust. The replaceable dual bushings ride evenly on the shaft for optimal alignment and reliability. The internal spiral groove helps to flush and lubricate the bushings during operation. Note: Some models are available with or without motor. See tables below for details. Read more
These new pumps take advantage of the venturi effect-as a stream of compressed air exits a constricted orifice the resulting pressure drop draws air through a vacuum port. Since they require no oil or electricity, the resulting vacuum (up to 29.5" Hg) is clean and efficient. With no moving parts or electrical hazards, these pumps are also intrinsically safe. The remarkably compact size of these pumps enables you to design vacuum systems with smaller, less expensive components and reduced maintenance costs. Each model (except 79165-40) includes a replaceable silencer that reduces noise levels up to 30% while offering minimal resistance to air flow. Select the pump model best suited to your specific application. Model 78165-20 includes a vacuum gauge which provides easy visual monitoring-helpful when troubleshooting. We recommend an air filter upstream of the pump to prolong service life. Filter should have a pore size of 50 µm or smaller. Order our 75300-92 filter/regulator below. Read more