FORMALDEHYDE
These fluids are difficult to meter.
MERCURY MOLTEN METALS SULFUR D I O X I D E HYDROBROMIC ACID SULFURIC A C I D HYDROCHLORIC ACID LIQUID
BROMINE
LIQUID CHLORINE FLUORINE GAS HYDROFLUORIC A C I D H Y D R O G E N FLUORIDE SULFUR DICHLORIDE
They are handled successfully by the
Lapp PULSAFEEDER The Lapp Pulsafeeder is a highly-specialized, precision pump suited to a wide variety of special applications involving controlled-volume pumping of fluids. It's a combination pistondiaphragm pump having a hydraulically balanced
CONTROLLED-VOLUME CHEMICAL PUMP
diaphragm and a closed hydraulic system. The reciprocating piston action provides accuracy of positive displacement while the diaphragm isolates liquid being pumped from the pump's 'working parts. Eliminates need for stuffing box or running seal . . . prevents product leakage and contamination. Pumping speed is constant, variable flow results from variation in piston-stroke length . . . controlled manually by hand-wheel, or, in AutoPneumatic models, by instrument air pressure responding to any instrument-measurable processing variable. Pulsafeeder capacities range from 585 ML per hour up to 24 g p m maximum flow and pressures from minus atmospheric to 6800 psig. Specify Lapp Pulsafeeder when you need continuous (or intermittent) pumping, at accurately controlled volume, of fluids which cannot be satisfactorily exposed to conventional pistons, cylinders and stuffing box packing. Or because of the corrosive action of chemicals and/or the need for protection of product against contamination.
Lapp
WRITE FOR BULLETIN 4 4 0 containing typical applications, flow charts, description and specifications of models of various capacities and constructions. Lapp Insulator Co., Inc., Process Equipment Division, 6 0 0 2 Poplar Street, Le Roy, N e w York. Circle No. 44 • • Readers' Service Card VOL. 5 1 , N O . 9
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SEPTEMBER 1959
51 A
