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If the case is the gate valve disk is stuck open ( or not totally stuck but heavy ) WhenI come to move hand wheel , would the handwheel slide up the stem ? Or still only stem would move down . And what forces hand wheel from climbing up the stem in this case ?

What are applications of angeled globe valve ? And what makes it different from normal globe ?

What does the expression trim of valve mean ? Does it refer to valve seat only ? Or it points seat and disk ?

I am reading a book about valves and it says stem of valve can be attached to disk using some methods , one of them is : in slip type joint . Is that a type of welding method ?

Hi all I want to know ventilation required for an ICU , the following screenshot is from the ASHRAE standard . Why is the cfm/ft2 column empty ? does this mean that its designed only on number of people ?

Hi all , I have assembeled an air conditioning system on software and I want to determine the days where the system should work . The air conditioning is system is used only for cooling (no heating) . For that case , what is the default time for system to run used by hvac designers ?

Hi all , Knowing that wetbulb temperature and enthalpy lines are not identical (only approximated on chart) . I have a point of known wetness (kg/kg) and known dry bulb temperature and I want to know it's exact enthalpy . Then indentify the point that has the same enthalpy with an RH% of 100% ...

Hi all , I have bevel gear that works on ring gear (pinion and ring) simillar to the one in the following picture : I want to charachterize the small bevel gear (pinion) to give the measurements to a workshop to manufacture copies for this gear or buy it. Also I'd like to take an idea about...

Well that should be a basic question but for me it needs some clarification . for the bulk modulus of compressibility : K = - dP / (dV/V) why does K = 0 for compressible fluids ?? ,,,, I think of it like if we compress gas ie:decrease a certain masses volume (compressible fluid) its pressure...

Hi , What if I want to conduct a fractional factorial 2^13-5 experiment with minitab , I mean its a 2^13 and i want to make it a fractional factorial of V resolution so it will be 2^13-5 = 2^8 ,,,, can this ever be done with minitab ? can you recommend another software name that can do such...

For a centrifugal pump what significant signs I can see from outside of a real pump mounted in a system in order to differentiate between suction and delivery lines of centrifugal pump ?

A frient faced this question on a job test and I wonder what is the answer : What is the world ranking for the main reasons of mechanical defects?

ayone constructed DOAS air conditioning system in real before ? I have a few questions .

Hi guys , I wonder if it would be that hard to write my own code according to the numerical and mathematical modeling equations of heat and mass transfer , where I know each piece of code detail. Or is it too hard and time consuming and I'd better just go for a commercial package like openfoam...