Why is an oil separator critical for my compressor?

It prevents lubricating oil from migrating into the heat exchangers, where it forms an insulating film that reduces heat transfer efficiency. It also ensures the compressor maintains its oil level to avoid mechanical failure.

How do I choose between Welded and Demountable types?

Welded units are cost-effective and leak-proof for standard applications, while Demountable units feature a flange design for easy internal cleaning and maintenance in industrial environments.

Are KAK oil separators compatible with R410A systems?

Yes. KAK TPLW series is designed for high-pressure durability up to 31 Bar (450 PSI), covering R410A, R134a, R404A, and other common refrigerants.

Do you provide technical sizing support?

Yes, our engineering team provides customized selection reports based on your system's BTU/h or kW capacity and compressor type.

Refrigeration Oil Separator | KAK HVACR Solutions

Product Overview

HFC/HCFC Compatible

KAK OS Series Refrigeration Oil Separators are engineered to protect compressors and optimize heat transfer in commercial and industrial HVAC systems. By intercepting oil aerosol from discharge gas, our separators ensure high-purity refrigerant circulation and reliable oil return to the crankcase, preventing efficiency loss from oil film buildup.

Key Technical Features

High Separation Efficiency: Multi-layer stainless steel mesh.
System Versatility: Compatible with R410A, R134a, R404A, R507.
Rugged Reliability: Max. Working Pressure 31 Bar (450 PSI).
Thermal Endurance: Operating range -40°C to +120°C.
Anti-Corrosive Coating: 50-80μm durable powder finish.
Low Pressure Drop: Optimized internal baffle design.

1. Conventional Welded Oil Separators (KAK-55, 56 Series) – Full Data Click to View All Models +

Full range coverage from 3/8″ to 2-1/8″. Includes multi-refrigerant (R22, R134a, R404A/R507) capacity data at various evaporating temperatures.

Model	Conn. (Inch)	Dimensions (mm)			Nominal Capacity (kW) at Evaporating Temp.
		ΦD	H	A	R22			R134a			R404A/R507
		ΦD	H	A	-40℃	-20℃	5℃	-40℃	-20℃	5℃	-40℃	-20℃	5℃
KAK-55813	3/8″	102	242	48	4.8	5.9	6.4	2.9	4.0	5.6	4.8	5.7	6.3
KAK-55824	1/2″	102	242	48	5.3	6.2	7.0	3.2	4.5	6.2	5.3	6.2	7.0
KAK-55855	5/8″	102	336	48	15.8	17.5	19.3	11.4	13.4	15.8	14.4	16.4	19.3
KAK-55866	3/4″	102	336	48	24.6	26.2	28.1	16.7	19.3	22.4	22.8	25.2	28.8
KAK-55877	7/8″	102	418	48	24.6	26.2	28.1	16.7	19.3	22.4	22.8	25.2	28.8
KAK-55888	1″	102	448	48	31.7	34.3	37.0	22.4	26.3	29.9	30.0	33.4	37.4
KAK-55889	1-1/8″	102	448	48	31.7	34.3	37.0	22.4	26.3	29.9	30.0	33.4	37.4
KAK-559011	1-3/8″	102	473	48	40.4	43.6	47.5	28.1	33.6	40.4	36.7	43.3	49.0
KAK-569011	1-3/8″	159	350	70	45.2	47.4	49.2	33.4	40.4	48.4	41.0	45.2	50.8
KAK-569213	1-5/8″	159	428	70	56.3	58.9	63.3	41.3	48.4	56.3	51.0	57.3	65.1
KAK-569417	2-1/8″	159	490	70	91.4	102.3	105.5	63.3	74.8	88.8	88.5	98.4	108.6

2. Demountable Flange Oil Separators (KAK-53, 63 Series) – Full Data Click to View All Models +

Maintenance-friendly flange design. Optimized for R22, R134a, and R404A/R507 high-capacity industrial systems.

Model	Conn. (Inch)	Dimensions (mm)			Nominal Capacity (kW) at Evaporating Temp.
		ΦD	H	A	R22			R134a			R404A/R507
		ΦD	H	A	-40℃	-20℃	5℃	-40℃	-20℃	5℃	-40℃	-20℃	5℃
KAK-5300	3/8″	102	247	48	4.8	5.9	6.4	2.9	4.0	5.6	4.8	5.7	6.3
KAK-5301	1/2″	102	247	48	5.3	6.2	7.0	3.2	4.5	6.2	5.3	6.2	7.0
KAK-5302	5/8″	102	341	48	15.8	17.5	19.3	11.4	13.4	15.8	14.4	16.4	19.3
KAK-5302A	3/4″	102	341	48	24.6	26.2	28.1	16.7	19.3	22.4	22.8	25.2	28.8
KAK-5303	7/8″	102	423	48	24.6	26.2	28.1	16.7	19.3	22.4	22.8	25.2	28.8
KAK-5303A	1″	102	453	48	31.7	34.3	37.0	22.4	26.3	29.9	30.0	33.4	37.4
KAK-5304	1-1/8″	102	453	48	31.7	34.3	37.0	22.4	26.3	29.9	30.0	33.4	37.4
KAK-5305	1-3/8″	102	478	48	40.4	43.6	47.5	28.1	33.6	40.4	36.7	43.3	49.0
KAK-6303	1-3/8″	152	355	70	45.2	47.4	49.2	33.4	40.4	48.4	41.0	45.2	50.8
KAK-6304	1-5/8″	152	433	70	56.3	58.9	63.3	41.3	48.4	56.3	51.0	57.3	65.1
KAK-6305	2-1/8″	152	495	70	91.4	102.3	105.5	63.3	74.8	88.8	88.5	98.4	108.6