View Full Version : Sporlan LAC vs. OROA
02-17-2009, 08:54 PM
This question was inspired by Beachtech's post on being confused.
What determines whether a Sporlan LAC or OROA valve is used in a system? Since they produce the same end results (maintain adequate head pressure), why would one be chosen over the other. I just re-read Sporlan bulletin 90-30 and cannot seem to answer this question.
02-17-2009, 09:51 PM
02-18-2009, 05:15 PM
Andy Schoens site has most of the information you need.
Click on this link:
Look for literature, then Head Pressure Controls.
02-18-2009, 05:46 PM
thats what i been reading. the bulletins that start with 90-30 go into the different LAC's ond such.
but i am confused as to what exactly the difference in the LAC (headmaster) and the OROA is, and why one would be used over the other.
02-18-2009, 07:51 PM
the lac valves respond to discharge pressure, oroa's respond to receiver pressure. as far as selecting one over the other, there are several factors to consider, such as refrigerant type, tonnage, and condenser pressure drop.
02-18-2009, 08:31 PM
Here's my short answer to this question: ;)
For small capacity refrigeration units, say up to 3 tons or so, use the LAC-4.
The LAC-10 and OROA-5 have approx the same capacities. I would suggest price, availability, and preference be the main considerations here. Same holds true with the LAC-5. Keep in mind we recommend a check valve between the LAC and receiver to prevent migration during off cycle. It is not necessary with the OROA-5.
There are –HP (high pressure) versions of the LAC-4, -5, and -10 for R-410A service. The OROA-5 will not be redesigned to handle R-410A pressures.
02-18-2009, 10:44 PM
i was doing PM on some equipment and it was all WITT systems. the WIF had an OROA-5-180 on it, and the rest where WIC's that had the LAC's on them.
the WIF was only a 1 ton system...
i have never seen the check valve in a factory system that is in your bulliten... are they cheaping out?
02-19-2009, 08:32 PM
The OROA-5 will work fine on a 1 ton system, but it isn't most economic.
The check valve is only required with the LAC to prevent migration. If migration doesn't occur, then there is no need for it. :D
02-19-2009, 10:10 PM
so if everything you do and work on is a pump down system, a check valve is of no use then, thanks andy :)
the OROA is what the manu had in the system. i am just wanting to know why they may have went that route instead of the LAC's they used on the other 4 units i serviced at the same location...
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.