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  • Users: rickfer
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  1. rickfer

    AC for an electric room over a tunnel

    We are working in the HVAC desing for an electric room, built over a Tunnel. Tunel is underground, in intended to be the way out of the electric wiring coming out of the MCCs (located at the electric room). Room has forced ventilation from the outside. We try to keep tunnel temperature at...
  2. rickfer

    HVAC for high humidity ambients?

    We are working in a HVAC project for several buildings located in Guatemala. Humidity in the area is extreamly high: up to 80%. So, latent heat is almost as high as sensible heat, and we are having problems for selecting the equipment. Beside AC loads are higher than I'm use to. Do anybody...
  3. rickfer

    AVR Valve in Slurry Pipe

    Do anybody knows an Air-Vacuum Relief Valve that can work in a slurry pipe? We have a 8"ø HDPE Pipe, with 450 gpm of slurry 45%-50% solids. Pipe trajectory has being carefully traced, so we only have one high point, and no low points, and pumps motors have a VFD. I belive we don't need an AVR...
  4. rickfer

    AC in Electrical Rooms

    I'm looking for advise in order to select proper equipment for AC in a eletrical room. I requiere about 48,000 BTU/H of cooling capacity, and I wonder, Should I use a single AC unit? Or it is better to have 2 x 24,000 BTUH units? I'm worry that if an AC unit fails, or needs maitenance, room...
  5. rickfer

    Water flow for dust suppresion system

    What would be a recommended water flow for a dust suppresion system for a conveyor?
  6. rickfer

    Heated vs heaterless dessicant air dryer

    I'm looking to buy a new dessicant type air dryer for a very cold area, and I wonder, when is an area too cold? When do I need a heater for the regeneration of the air dryer and how much can I stand without the heater?
  7. rickfer

    Do air operated piston pumps require a pressure relieve valve?

    I'm wondering, if I need a pressure relief valve, for an aplication where I transfer oil from a tank to another. I'm planning to use a graco air operated piston pump, with a 4:1 relation. Cutsheets from graco don't shown a pressure relief valve, but I was recommended to use it. How ever, I...

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