brand of oil chages in nh3 systems
Have any of you been through this.
Where I work they have changed oil brands several times in the past few years, just to save a few penneys.
They look at the price of a gal. of oil but dont look at what it does to the system ...............We end up changing oil filters about 5 times as often as we should have to and it seems to kill v-rings and 0-rings on our shaft seals..........not to mention the problems we have with coalesing filters.
If you are looking at changeing brands of oil to save a few bucks
I would say dont do it, stay with what is working good for you now.
Re: brand of oil changes in nh3 systems
Changing oils so often is a waste of money and time if you have a well maintained and clean system. Even with the old mineral oils, we did not have an oil change interval. Monitor your oil and take oil samples at 3 month intervals. If the oil is in spec, leave it alone.
Now, are you adding a lot of oil? If you have a closed loop, you should be reclaiming the oil through an oil still (pot) or other means of recovery. If you are tossing the oil...why? Is the system dirty and your oil is contaminated?
Mixing oils from one vendor and oil from another vendor can spell trouble. They may have a slightly different additive package and react with each other. I have see two approved WF-68 oils mixed and cause a lot of foaming in a screw compressor system. The solution was to go back to one oil and flush the stem to get one oil in it. The oil vendors will generally tell you that you can mix oils. My experience is negative, especially in the ammonia systems.
The continued practice of changing manufactures is a money looser in the long run.