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← All products Axial · OB / OVK series

Axial Fans

Designed for ventilating industrial, public and agricultural buildings. Used for moving air mixtures free of mechanical impurities, explosion- and fire-safe, at temperatures up to 50°C.

Square mounting (OB)

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OB-2.6 Flow rate Q [m³/h]
Static pressure Pst [Pa]

Cylindrical channel (OVK)

OVK-2.6
OVK-3.2
OVK-3.5
OVK-4
OVK axial fan for in-duct mounting

Compact cylindrical-body fans for direct in-duct mounting — five sizes from 800 to 4,400 m³/h, in single-phase 220V and high-speed three-phase 380V variants.

OVK series — 220V, 1360 rpm Flow rate Q [m³/h]
1,000 2,000 3,000 20 40 60 80 100 OVK 2.6-4 OVK 3.2-4 OVK 3.5-4 OVK 4-4 Static pressure Pst [Pa]
Also available as OVK-2 high-speed 3×380V variants (2860 rpm) with up to 4,400 m³/h and higher pressure — contact us for that chart.

Cylindrical body (OB)

OB-4.5
OB-5
OB-5.2
OB-5.8
OB-6.2
OB-6.8
OB-7.5
OB axial fan with cylindrical housing and protective guard

Large direct-drive fans in a round housing — seven sizes from 3,500 to 23,000 m³/h, built in two motor-speed families: quieter 4-pole (1360 rpm) and low-speed 6-pole (940 rpm).

1360 rpm (4-pole) Flow rate Q [m³/h]
5,000 10,000 15,000 20,000 50 100 150 200 250 300 OB-4.5 OB-5 OB-5.2 OB-5.8 OB-6.2 OB-6.8 OB-7.5 Static pressure Pst [Pa]
940 rpm (6-pole) Flow rate Q [m³/h]
4,000 8,000 12,000 40 80 120 160 OB-4.5 OB-5 OB-5.2 OB-5.8 OB-6.2 OB-6.8 OB-7.5 Static pressure Pst [Pa]
All sizes are also available as reversible units, at 15% reduced flow.

Special-purpose (OVS)

OVS8-4
OVS8-6
OVS12-6
OVS12-8
Large OVS axial fan in a square frame with protective guard

For cases where large air volumes need to be moved at low speed and low noise. Belt-driven, with the impeller running slower than the motor.

Type Motor [rpm] Wheel [rpm] Power [kW] Flow [m³/h] Noise [dB] A [mm] B [mm] C [mm]
OVS8-414005000.559,500631020815400
OVS8-69403350.376,000581020815400
OVS12-69401800.3710,0006013601220400
OVS12-87501500.258,0005813601220400
Also produced at speeds other than those listed. Sound levels measured at 3× impeller diameter.
Heriks axial fan in a cylindrical housing
Made to order

Large axial fan

Large-diameter axial fans in a cylindrical housing, built to order for moving very large air volumes — for ventilating production halls, warehouses, tunnels and agricultural buildings, and for cooling process equipment. The impeller, housing and mounting are designed for the specific installation.

Heriks axial fan in an insulated housing
Made to order

Large axial fan with insulation

The same large axial fan in a sound- and heat-insulated housing, for installations where the noise from the fan must be reduced or where the housing has to be protected from condensation and heat loss.

For further information or to place an order, contact us.

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