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  • Users: piffer
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  1. piffer

    Simple Pump Application Question/Suggestions?

    I am trying to design a simple pumping system to transfer water over a 10' high wall that divides two basins. I want to use a 7.5HP submersible pump for this application. Design flow will be ~1-1.3 MGD. Static head will vary between 2 and 7 ft. In order to create sufficient TDH, I considered...
  2. piffer

    Suction Inlet Size

    I have a portable submersible solids handling pump mounted on a self-supporting stand in a large open pond. The pump curve shows BEP to be 1500 GPM @ 29 FT TDH. The pump curve ends at ~2500/10. The pump is operating just beyond BEP at ~1700 GPM @ 26 FT TDH. This pump has an 8" discharge and...
  3. piffer

    Axial Flow Pumps, Viscosity Correction

    Are there any technical papers that discuss prediciting axial flow pump performance is viscous applications?
  4. piffer

    Odor Control System

    Does anybody have experience with a VAPEX hydroxyl fog odor control system? Rather than drawing air from source and treating it, the Vapex system fogs the wetwell (or manhole, whatever) with a hydroxyl fog. Curious if the "hydroxy" will attack anything.
  5. piffer

    Plastic Piping for Submersible Sewage Pump Stations

    What are the drawbacks of using FRP (plastic) piping within a submersible sewage pump station. Most U.S. municipalities that I work with standardize on ductile iron piping within a pump station. Plastic piping is commonly used in Canada, with excellent results. I am wondering if anybody can...
  6. piffer

    Municipal Wastewater Pumps- Seal Mat'l Recommendations

    I'm looking for expert opinions on recommended seal face materials for sewage pumps (pros/cons). Tungsten-carbide vs. Tungsten-carbide or silicon-carbide vs. silicon carbide
  7. piffer

    VFD Safety

    Has anybody experienced a drive "going plasma?" I was at an equipment startup recently and a brand new 200 HP drive toasted after ~20 minutes of operation. The drive rep. said it "went plasma." It was very fortunate that the panel door was closed. Minutes earlier...

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