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Recent content by jwdundee

  1. jwdundee

    Electrostatic Repulsion

    I am currently working with a client on a flowcoating process. The slurry used is extremely adhesive and is also expensive. In order to retain as much of the slurry as possible, we are looking at electrostatically charging the collection trough such that it will have the same charge as the...
  2. jwdundee

    Positive Pressure - How much is enough

    I am evaluating the existing Air Conditioning system for an MCC (motor control center) room at a steel mill. The system has a supply air flow of 14,600 scfm and an exhaust air flow of 13,600 scfm. The room is 125'x25'x14'. This appears to equate to 20 air changes per hour. However, they are...
  3. jwdundee

    Viscosity effect on Relief Valves

    I am looking into replacing several rupture disks with relief valves. The fluid is highly viscous (6,000-7,000 centipoise at 70F) and the flow is low (0.55 gpm). The fluid is 10% NaOH and 90% wetted cellulose in water and has a specific gravity of 1.12. I am not sure of the chance of the...

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