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Mechanical seals 105
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abrasive adjustable-speed adjustable-speed drives affinity laws ANSI pumps applications bearings best efficiency best efficiency point bypass calculated capacity cavitation centrifugal pumps chemical cost d.c. drives diaphragm pumps discharge pressure double seal ECTFE electric energy engineering equipment factor failure flow flowrate fluid flush friction gear pumps higher horsepower impeller increase inlet installed leakage liquid load losses lubrication magnetic manufacturers materials maximum mechanical seals minimum motor non-Newtonian fluids normal NPSH NPSHA output piping piston plastic positive-displacement problems pump operating pump performance pump speed pump's rated reciprocating pumps recirculation reduced required NPSH rotary pumps rotating rotor seal faces seal-face sealless pumps secondary seals selection silicon carbide slurries specific speed standard stator stuffing box suction head suction lift temperature tion torque total head tungsten carbide typical users valve vapor pressure vary velocity viscosity voltage wear