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  1. Jamsith

    2way valve PICV valve

    Hi dears, Please explain to me the control methodology for this Two way valve & PICV Valve. What I understand, this both valves are creating pressure inside the system by closing the path of the fluid, then the VFD system reduces the speed of the pump to reduce the system pressure accordingly...
  2. Jamsith

    Duct Fittings Pressure Drop Values

    Actually it's same like lukaiENG said, in the ASHRAE The pressure drop for the fitting given by the equivalent length of straight duct. So this will describe you the length only. but static loss values will not be same for the different materials of same sizes. for example if your sizing your...
  3. Jamsith

    Supply vs Return Static Loss

    Dear Friends: I am still having these doubts everytime when I start to make a static pressure calculation. Some time I dont consider the static pressure for the Return duct. Since very small in the length. But some cases the return duct also need to make same like supply duct. in these I...
  4. Jamsith

    Stairwell Pressurization system

    Hi Guys...... Still I am struggle on this.... Please somebody help me
  5. Jamsith

    Why Should need to insulate the GAS Line?

    Thanks Mr. Trashcanman & Itsmoked, by the above your support now it's clear for me that the insulation for the compressor suction line, will avoid the condensation of moister in the atmosphere and we need cool gas to cool the compressor. but some systems like VRF they do have the EXPANSION...
  6. Jamsith

    Stairwell Pressurization system

    Which is the correct method to sizing the duct for the STAIRWELL Pressurization system, by constant friction or constant velocity? if by velocity what is the normal sizing values for this? please help me. I am in the mid of sizing.
  7. Jamsith

    Why Should need to insulate the GAS Line?

    Hi Dears, Hope you all fine, Now I am working as a junior project engineer in the HVAC installation and maintenance company. This is my earlier period and the time for learning. So I have many doubts from the theory what we studied in our universities. As I raised question in the title. Why...

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