No Glubs, Gurgles, Grumbles or Groans Proven DD-20 is our most silent vacuum pump ever. Listen to the quiet at working pressure with the Precision® DD-20. Our internal baffle puts a lid on noise. An exhaust valve along with the baffle elimi nates oil back-up. Your system runs quiet and clean. Removable intake lets you adapt
to a variety of setups, quickly and precisely. Work to a low 5 micron ultimate vacuum. The DD-20 gives you a full 10 liters/minute pumping efficiency even at 100 microns. It's 16 lbs. light and 10" χ 7 3/4 " x 6 Vi " small to carry wherever you need. Hear about our complete line of vacuum pumps. Write Precision Scientific, 3737 West Cortland | ^ Street, Chicago, Illinois 60647.
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