For less noise or better removal of lubricating oil mist, use a more restrictive muffler (smaller micron pore size), which slightly decreases flow.  Also, the small, sintered bronze ones don't get broken off like the larger plastic ones. --- AOD pump body construction.  For emptying 55-gallon drums & totes, I like the lightweight polypropylene body pumps with intake pointing directly down.  These sit directly above the bung (opening).--- AOD check valve design.  Maybe doesn't matter if you only pump liquids, but if you have solids, the flapper valves don't jam as much the check balls. I've also heard a rumor that some manufacturer had the clever idea to make the outlet check balls larger diameter than the inlet check balls to reduce jams (whatever enters can get out!). --- Location.  Try to avoid any possibility of siphoning; eventually it will happen.   Better to put the pump above the source & below the outlet. Also, keep the inlet hose as short as possible.--- Surge dampener.  The ones I have seen are like a flexible bladder & very expensive.  But, as others control valves have  mentioned, you may need for a flowmeter to work.  Also, you don't want 100 psi [or ~whatever your air pressure is] pulses going down your outlet hose or piping.  Hoses get loose, PVC pipe breaks.  Not nice to be around when it happens. --- Air valve construction.  I suggest one that needs little or no lubricating oil

2011-09-02

Back