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1 47 <br /> _f-i <br /> Gri k <br /> 400 <br /> _40- <br /> tr ! <br /> Operating principle <br /> VJV <br /> F0,OSMON t PrMMN2 <br /> L <br /> PUSITMN 3 M5MON A <br /> ti <br /> t•__a <br /> Two"Figure 8" 10)v impellers; <br /> - , <br /> mounted on parallel.Shafts, route irl <br /> owe-Ae directions. As cuach impetivi <br /> Passes the blowui inlet,11 traps a definite <br /> volurnn of air and carries d around the <br /> case to the biciwer outlet,whern rhe jir i4 <br /> Wish constant speed opera- <br /> bon, the displaced Volume is essentially <br /> thQ carne regardtess of pres,;ufe, iem- <br /> ::_ pprature or baromelrir.pressure. <br /> �`-.:� i 1� ff A '' , �€ .•_, ~�� Timing gears control the relative po <br /> s <br /> sition of the impellers to each othr+r and <br /> maintain small but definite clearances. <br /> {S` Tht s afl. w,i operation withoi it lubrii-aljorl <br /> ng fequirod insi-dethe air casing_ <br /> �}=•yitrMllf l i:��:lsl r }> f';:p'yc =3HA;7 C3N 11 V7. SMAVT C'N <br /> H(!Frr7l�F�'S"�r. Mfltif:l't�rC <br /> kl. ' <br />