Thanks for your reponces. For "25362", the data sheet is not metioning clearly where the suction press. is measured. But, it is written in the "Operating Conditions" section which talks mainly about the pump itself.
In addition, tow values are given for the Suction Press. Max. and Rated. So, I...
In the data sheets of some new pumps I noticed that the pump Suction Press. is equal to or a bit less than the pumped liquid Vapour Press. at the pumping temp.
Wouldn't that cause a cavitaion problem?
In addition, the data sheets shows that there is NPSHa (few meters). But how come we have...
When selecting a new pump for a process plant how to decide if you need a single or a double mechanical seal?
Is this seal selection based on the pumping conditions (disch. press, vap. press, ..etc), or is there a definite rules for such selection?
I searched in the API682 and API610, but...
For a cetrifugal pump, the load should be minimum when the discharge valve is closed. But, in your case it is not. My first impression would be that there is something wrong with the motor itself, and not a mechanical fault. specially if the pump was not showing any upnormal noise, vibrations of...
upm
Thanks for your help. We do have both low level and low pressure alarms in the system.
The problem is that the temp. is so low to have a suitable barrier flid with the right freezing point!
Actually it is a vertical, multistage pump. And I was mainly looking for a fluid which is having a freezing point below -104 deg.C (as this will be the easiest way to solve this problem).
But, if I do not find one, I will go for modifying the seal system which will be a bit more complicated and...
We used to use Propanol as a barrier fluid for our Ethylene Transfer Pump which uses a double, back to back mechanical seal arrangement, and which pumps Ethylene at
-104Deg C (-155F).
But we can not use this Propanol any more as it will contaminate the process in case of seal failure.
Is...
