Introduction
The task of conventional oil separators is to separate oil from discharge refrigerant correctly and ensure oil return to the compressor most effectively. The purpose is maintaining crankcase oil level and increasing the efficiency of the system by minimizing excessive oil circulation.

OS.33b Conventional Oil Separators
There are mesh type filters which has metal plates between the inlet and outlet connections of the conventional oil separators. The refrigerant which enters rapidly from the inlet port thru the filter makes a “U” turn inside the separator and exits from the outlet port thru another filter to the condenser.
The oil droplets accumulating on the filter surface and the oil particles separated from the refrigerant gas by centrifugation accumulate in the chamber under the effect of gravity. When the amount of oil in the chamber reaches the desired level, the float opens and oil is sent to the compressor directly or indirectly. Traditional oil separators provide 80% efficiency. All kinds of metal parts are easily caught with the magnet in the floating part at the oil outlet and the floater works in a cleaner environment.
OS.33b series oil separators are suitable for systems with low pressure lubrication as they have a float valve system. It can be directly connected to reciprocating and scroll compressors. It is not recommended for use in screw and rotary compressors.
Always make sure that the float system is not damaged and is in working condition. The outer body is made of carbon steel, the float part is made of stainless steel, the float needle is made of stainless steel or brass, and the oil return pipe is made of brass.

OS.F.33b Conventional Oil Separators & Flange
Flanged oil separators have the same function as conventional oil separators. The difference from the OS.33b series is that it has a removable flanged structure for cleaning the float system. Flange type conventional oil separators should be preferred in systems that require cleaning and replacement.