This metering pump has
NO STUFFING BOX Lapp PULSAFEEDER CONTROLLED-VOLUME CHEMICAL PUMP Prevents Costly ^ Leakage and Contamination Lapp Pulsafeeder is a piston-diaphragm pump having a hydraulically balanced diaphragm and a closed hydraulic system. Its 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. Maintenance costs, too, are reduced to next to nothing. There are practically no repairs or replacement parts. All Pulsafeeder pump parts contacting liquid are of special corrosion-resistant materials. Pumping speed is constant; variable flow results from variation in piston-stroke length, controlled manually by hand-wheel, or, in auto-pneumatic models, by instrument air pressure responding to any instrument-measurable processing variable. Pulsafeeder capacities range from 585 ML per hour up to 24 gpm maximum flow and pressures from minus atmospheric to 6800 psig. WRITE FOR BULLETIN 4 4 0 containing typical applications, flow charts, description and specifications of models of various capacities and con structions and special leakage chart. Lapp Insulator Co., Inc., Process Equip ment Division, 6003 Poplar St., Le Roy, κ I " X J J i " N e w York. ! iffcirfkfîsrfî Circle No. 16 on Readers' Service Card VOL. 5 1 , NO. I I
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NOVEMBER 1959
43 A
