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  • Users: shiplu48
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  1. shiplu48

    Movement Damping In Pressure Gauge.

    Hi, I have come up with a pressure gauge data sheet and found a parameter called "movement damping". What does "movement damping" in pressure gauge really means in data sheet? I have gone through that term and found out that "Dampened Movement" minimizes effects of vibration without liquid...
  2. shiplu48

    Process condition for On/Off valve.

    Hi, I have a data sheet of a On/Off valve. The valve is intended to be operated for N2 gas. The downstream of the valve get mixed with the process liquid. But the data sheet contains process condition(fluid properties) for liquid instead of gas. Both fluid process conditions are different at...
  3. shiplu48

    Critical Pressure of mixture

    Hi, What could be the critical pressure of a mixture (suppose N2 and H2O)? Would it be the critical pressure of N2 and H2O (Both)? Or, it would be a different one other than both of these? Many thanks. Shiplu48
  4. shiplu48

    Temperature chage rate!

    Hi, Is there any way for calculating temperature changing rate in a reactor? Would be grateful for getting any help. Many Thanks.
  5. shiplu48

    Super Critical fluid

    Hi, What does super critical fluid really means? As from common knowledge it implies any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist. If it is that than how CO2 and water could be the most commonly used super critical...
  6. shiplu48

    Latent heat of vaporization

    Hello, Is it possible to have latent heat of vaporization of Nitrogen at 1 atm and 25 deg.C, despite that nitrogen in vapor phase? If the answer is no than why ASPEN, during simulation, shows latent heat of vaporization for Nitrogen. Need help regarding in this case. Many Thanks. shiplu48
  7. shiplu48

    Vacuum in Rupture Disk

    Hello, What are the inlet and outlet vacuum condition in Rupture Disk? And how are they determined? Any information is highly appreciated. Many Thanks. Shiplu48
  8. shiplu48

    Minimum required relieving rate!

    Hello, In the calculation of minimum required relieving rate for PSV in a cooling water line, we have to use following equation, q = (alphav*phi)/(1000*d*c) [API Standard 521; Section 5.14.3] But I don't get how the unit of q comes in m3/s. Require help in this matter! Regards Shiplu48
  9. shiplu48

    Fire Case or Non Fire Case

    Hello, I am facing difficulties for selecting Fire Case or Non Fire Case in PSV sizing. I have a vessel that contains mixture of liquids including water. Water is the only compound that is to be vaporized. The vessel is kept just below the saturated condition of water. When the temperature of...
  10. shiplu48

    Distance between RD and PSV

    Hello, Is there any regulations regarding the distance of rupture disc installation with PRV? One information that I have found is "it should be closed coupled (1-2 feet)". But I don't know where does it come from, ASME or API? According to this rule distance between PRV and RD should be...
  11. shiplu48

    Back Pressure of Rupture Disk

    Hello, I getting confused about the variable "back pressure" for Rupture Disk. And how to calculate it? I also need to know how to calculate the "required relieving rate" for rupture disk. I would be very gratefull for getting help! Many Thanks.
  12. shiplu48

    Cp/Cv for gas or for both gas and liquid!!

    Hello, As far as I know, Cp/Cv is a parameter for gas. But during the simulation in ASPEN HYSYS if I pick up a liquid stream and enter necessary parameters like P, T and mole or mass fraction then it shows the corresponding parameters of liquid and I also get the value of Cp/Cv. I am not...
  13. shiplu48

    Differential Pressure Transmitter Element

    Hello, Is Diaphragm is the pressure element of a Differential Pressure Transmitter (PDT)? If so then what could be the range of it? If someone could enlighten me about this I would be very grateful. Many Thanks
  14. shiplu48

    Allowable overpressure - Overpressure factor

    Hello, Recently, I have been doing work on PSV datasheet that have to be filled up by "Allowable over pressure (%)" and "Over pressure Factor". But it gets me really confusing to differentiate between these two parameters. As far as I know, these two parameters are quite same! If someone could...

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