Calibrating the pressure gauge at the outlet of the oil sealing pump and introducing isolation fluid – could this cause the hot oil pump to become evacuated?
Thread Content
The outlet pressure of the oil sealing pump is low; a technician was called to calibrate the instrument. As fluid started to flow, did the hot oil pump get evacuated? Has anyone experienced this? How to avoid it? Are there any standards for applying isolation fluid?
Can the instruments of the oil sealing system be fed with isolation fluid? Are there any design requirements?
Use a heavier fraction for the isolation liquid.
What other media can be used as isolation fluid?
Our isolation fluid is purchased from the manufacturer
Our isolation fluid is purchased from the manufacturer, y
Why do you say that? What is the basis? The original poster has already stated that they use hot oil pumps, and the fluid used in these pumps is generally quite dense; is it then necessary to use a fluid that is even denser as an isolation liquid? Pump evacuation is caused by an excessive amount of isolation fluid, which enters the heavy oil system as flushing oil; vaporization then leads to evacuation! In daily operations, oil sealing with water can also occur, it’s just that the media are different!
Ethylene glycol aqueous solution (7:3 ratio)
Are there any friends in the design field who know what form the instruments for the oil sealing system should take? Are there any requirements? Capillary single flange?
The mechanical seal you are using likely adopts the PLAN32 design; the flushing fluid is a clean, lightweight liquid that provides effective cleaning, lubrication, and cooling for the friction surfaces of the mechanical seal. It also has a certain diluting effect on the medium inside the pump. If too much flushing fluid is used, it can cause significant differences in the composition of the medium within the pump. Due to the high temperatures inside the pump, this medium may vaporize instantly, resulting in vacuum formation within the pump!