Oil-/air-cooling units

Okan

Funke has a comprehensive standard range in the oil/air cooler sector, which covers numerous mobile and stationary applications.

This includes, in the first instance, the Okan 2.79 cooler series, which can be adapted to suit a wide range of customer requirements due to its modular design. For example, special designs are available for marine and offshore applications, or for installation in areas where there is a high risk of explosion.

The Okan E series is also available. The Okan E series oil/air coolers have been specially developed for standard applications in the industrial hydraulics sector which do not impose any special requirements on the design of the oil/air cooler.

In addition to extensive documentation, 3D models of all oil/air coolers are included as step files.

Design and function

The basic element is an aluminium cooler in bar and plate construction, as shown below. The oil tubes are fitted with turbulence elements to guarantee optimum heat transfer.

The fan mounted behind the cooler operates as suction in standard mode. The slat shape, fan blades and motor power are aerodynamically and thermodynamically coordinated to achieve a high degree of heat dissipation.

Design of a
oil-/air-cooling unit

Cooler
Support brackets
Fan guard
Three-phase motor
Fan cover
High-performance fan
SAE counterflange

Cross section of a
oil-/air-cooling unit

Tank
Turbulence elements
Air slants
Side wall

OKAN II (Längerer & Reich system)

OKAN E

Applications

Cooling of oils, hydraulic fluids and emulsions using
ambient air, particularly in the field of mechanical and
plant engineering, construction machinery and special
vehicle manufacturing
Used as an additional cooler at peak load times (summer) – wherever water is not available or piping is too expensive

Advantages

effectively low costs per kW heat dissipation
sturdy, compact design with high standards of quality
wide range of accessories and combinations available
customer-specific designs possible
low costs for installation
variable installation position
maximum available over a long service life
virtually maintenance-free

Okan 2.79

Operating data

13 sizes (see tables below)

max. cooling capacity: approx. 6.2 kW/K
max. operating temperature: for oil 100°C for emulsion 90°C
max. operating pressure, static: 16 bar (size 15 to 10 bar)
ambient temperatures: -20°C to +40°C
cooling surfaces: 0.05 to 1.44m²
fan drives: three-phase motor, direct current motor, hydro motor
available up to size 10 in 1-way and 3-way versions

Size		02	03	04	05	06	07	08	09	10	11	13	14	15
Cooler core (m²)		0.050	0.080	0.100	0.160	0.200	0.250	0.315	0.400	0.500	0.600	0.800	1.000	1.440
Weight ≈ (kg)		16	23	25	35	38	46	51	68	78	138	177	189	300
Dimensions ≈ (mm)	Width	295	350	350	455	455	550	550	660	820	820	970	970	1286
	Height	380	440	510	610	710	720	850	850	870	1020	1170	1360	1520
	Depth	425	470	470	540	540	575	575	635	635	710	810	810	800
Noise level 1m/7m (dB(A))	750 min^-1	-	-	-	57/45	58/46	62/50	66/54	75/63	74/62	76/64	79/67	79/67	88/76
	1000 min^-1	-	59/47	59/47	64/52	65/53	70/58	72/60	80/68	80/68	82/70	85/73	86/74	95/83
	1500 min^-1	61/49	70/58	70/58	75/63	75/63	82/70	81/69	90/78	91/79	92/80	92/80	95/83	99/87
	3000 min^-1	79/67	84/72	84/72	-	-	-	-	-	-	-	-	-	-

Okan E

Operating data

7 sizes (see table below)

max. cooling capacity: approx. 1.9 kW/K
max. operating temperature: for oil 100°C for emulsion 90°C
max. operating pressure, static: 26 bar
ambient temperatures: -20°C to +40°C
cooling surfaces: 0.08 to 0.5m²
fan drives: three-phase motor
additional connections for monitoring temperature and pressure

Size		02	03	04	05	06	07	08
Cooler core (m²)		0,08	0,15	0,15	0,22	0,35	0,43	0,50
Weight ≈ (kg)		24	27	28	42	51	56	100
Dimensions ≈ (mm)	Width	357	446	446	470	607	607	725
	Height	420	520	520	690	790	940	960
	Depth	391	460	460	501	506	506	615
Noise level 1m/7m (dB(A))	750 min^-1	-	-	-	-	-	-	70/58
	1000 min^-1	-	63/51	62/50	61/49	68/56	68/56	74/62
	1500 min^-1	62/50	71/59	70/58	70/58	78/66	77/65	83/71
	3000 min^-1	80/68	-	-	-	-	-	-