PChemLabTXT_page_600

PChemLabTXT | page 600 | https://thedailydialectics.com/pdfs/education/chemistry/p-chem/PChemLabTXT/PChemLabTXT.pdf

ic Confirming Pages Pumps 589 Gas intake FIGURE 1 Schematic diagram of a rotary oil pump similar to the Welch Duo-Seal; based on the Gaede oil pump design. the hammer noises tend to be intermittent or muffled when the vacuum is less good. By contrast, the Duo-Seal and Edwards belt-driven pumps are…