RKHD Variable Speed Rotary Screw Compressors 50-420 HP

The RKHD is a series of oil-flooded, rotary screw air compressors particularly designed for generating industrial use compressed air.

In case of non-continuous needs and several daily fluctuations of air demand, the RKHD–VSD is the most suitable solution. Low rotational ensures a long life and high efficiency of the compressor. The variable speed version is equipped with a Inverter Duty Motor.

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RKHD Variable Speed Rotary Screw Compressors 50-420 HP
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View Models and Specifications
Model #HPPSICFMOutlet DimensiondBADimensionsWeight (lbs) price
RKHD-50VSD 50 100 46 - 247 1 1/2" 74 74 x 48 x 63 2216
RKHD-50VSD 50 110 49 - 233 1 1/2" 74 74 x 48 x 63 2216
RKHD-50VSD 50 125 60 - 219 1 1/2" 74 74 x 48 x 63 2216
RKHD-60VSD 60 100 44 - 283 1 1/2" 74 74 x 48 x 63 2407
RKHD-60VSD 60 110 49 - 272 1 1/2" 74 74 x 48 x 63 2407
RKHD-60VSD 60 125 53 - 256 1 1/2" 74 74 x 48 x 63 2407
RKHD-75VSD 75 100 57 - 335 1 1/2" 74 74 x 48 x 63 2762
RKHD-75VSD 75 110 58 - 327 1 1/2" 74 74 x 48 x 63 2762
RKHD-75VSD 75 125 62 - 307 1 1/2" 74 74 x 48 x 63 2762
RKHD-100VSD 100 100 143 - 505 2” 74 83 x 60 x 77 4850
RKHD-100VSD 100 110 142 - 494 2” 74 83 x 60 x 77 4850
RKHD-100VSD 100 125 140 - 459 2” 74 83 x 60 x 77 4850
RKHD-125VSD 125 100 198 - 639 3” Flange 76 118 x 73 x 80 6614
RKHD-125VSD 125 110 191 - 618 3” Flange 76 118 x 73 x 80 6614
RKHD-125VSD 125 125 180 - 576 3” Flange 76 118 x 73 x 80 6614
RKHD-150VSD 150 100 244 - 784 3” Flange 76 118 x 73 x 80 7055
RKHD-150VSD 150 110 234 - 749 3” Flange 76 118 x 73 x 80 7055
RKHD-150VSD 150 125 221 - 682 3” Flange 76 118 x 73 x 80 7055
RKHD-180VSD 180 100 290 - 911 4” Flange 78 130 x 74 x 84 7937
RKHD-180VSD 180 110 272 - 862 4” Flange 78 130 x 74 x 84 7937
RKHD-180VSD 180 125 252 - 802 4” Flange 78 130 x 74 x 84 7937
RKHD-220VSD 220 100 332 - 936 4” Flange 78 130 x 74 x 84 10141
RKHD-220VSD 220 110 325 - 922 4” Flange 78 130 x 74 x 84 10141
RKHD-220VSD 220 125 313 - 893 4” Flange 78 130 x 74 x 84 10141
RKHD-250VSD 250 100 432 - 1245 4" Flange 78 136 x 79 x 85 10582
RKHD-250VSD 250 110 417 - 1180 4” Flange 78 136 x 79 x 85 10582
RKHD-250VSD 250 125 395 - 1122 4” Flange 78 136 x 79 x 85 10582
RKHD-270VSD 270 100 487 - 1271 4” Flange 78 136 x 79 x 85 10803
RKHD-270VSD 270 110 466 - 1243 4” Flange 78 136 x 79 x 85 10803
RKHD-270VSD 270 125 441 - 1201 4” Flange 78 136 x 79 x 85 10803
RKHD-340VSD 340 100 528 - 1554 5” Flange 78 158 x 85 x 89 15432
RKHD-340VSD 340 110 519 - 1501 5” Flange 78 158 x 85 x 89 15432
RKHD-340VSD 340 125 509 - 1423 5” Flange 78 158 x 85 x 89 15432
RKHD-420VSD 420 100 673 - 1925 5” Flange 78 158 x 85 x 89 17196
RKHD-420VSD 420 110 653 - 1872 5” Flange 78 158 x 85 x 89 17196
RKHD-420VSD420125627 - 17835” Flange78158 x 85 x 8917196

Features and Benefits

Variable Speed Drive Technology – The VSD unit allows the compressor to be very flexible and efficient in responding to changes in air demand. The required air demand is managed through the inverter that constantly adjusts the speed of the electric motor and the compressor. The real air flow and pressure values are constantly monitored through the electronic controller to guarantee achievement of the preset values.

Cooling System – The Variable Speed Drive (VSD) series has been developed and sized to work at a 100% duty cycle even in the most severe conditions. Energy savings are achieved due to an inverter controlled fan of the oil cooler. All the components are fully enclosed and protected from contamination. The air cooling system has been sized to work at up to 125° F ambient temperature.

Industry 4.0 Capable – RKHD Compressors are Industry 4.0-Ready. The compressor can be networked locally and managed remotely via the internet.

Electronic Controller – The intuitive KTronic 1000 touch screen panel permits full access to the functions, parameter control and diagnostics of the unit, increasing the efficiency of the compressor.

Improved Air/Oil Temperature Control – The air and oil coolers are separate and managed individually on the RKHD-VSD Series. The oil cooler fan is inverter controlled and dynamically manages the temperature of the oil. The perfectly controlled oil temperature is a benefit to the oil circuit and further improves energy savings. In addition, the separate air cooler management allows optimization of the air temperature at the compressor outlet, avoiding condensation and eliminating the damages caused by moisture. As a result, the dryer after the compressor also benefits from the lower operating load.

Easy Maintenance – The access panels are easily removed and permit quick access to all the components that require routine maintenance. The air-oil separator cartridge can be quickly replaced with an easy rotation of the tank lid on its pivot arm.