Screw compressors DV-series

Screw compressor DV series with direct drive 1:1 and frequency control

Specifications

Article11300035
ModelDV-1508
Drive power (kW)15
Max. operating pressure (bar)8
Max. volume flow* (m³/min)2.3
Nominal voltage (phase/V/Hz)3/380-420/50
Sound pressure level** dB(A)69
Threaded connection1/2"
Length L (mm)1190
Width D (mm)810
Height H (mm)1280
Weight (kg)445

* Measured according to ISO 1217
** Measured according to ISO 3744

4.278,00 €
Net, VAT-free shipment
-7%
4.600,00 €
Net, VAT-free shipment
Quantity pcs.FREE delivery!
Delivery time 1 working days

DV-Series rotary screw oil-filled compressors feature high performance, reliability and efficiency. The screw unit has a direct one-to-one connection to the motor through a coupling and transfers the torque without loss, increasing the energy efficiency of the compressor in comparison with a belt or gear drive.

Features

Comprag DV-Series compressors are noise-and vibration-insulated and can be installed in any industrial premises in close proximity to the consumer. This eliminates the need to install costly noise insulation and to run long compressed air lines, thereby reducing pressure losses and increasing system efficiency.

  • Direct one-to-one drive. The large size of the screw unit and the low rotational speed of rotors extend the service life and reduce vibration and background noise.
  • Efficient and quiet centrifugal radiator cooling fan. Centrifugal fans sustain constant pressure throughout the whole air-flow diameter. Thermal conductivity with the use of centrifugal fans is greater than that from the use of axial fans.
  • The components of the compressor are connected using a metallic pipe arrangement or flexible metal hoses. This assembly method is more reliable and durable than the use of rubber hoses.
  • The immediate pressure control function provides a fail-safe in the control system during start-up of the compressor.
  • Easy access to the main compressor modules for servicing.

DV-series frequency control

A plant's demand for compressed air varies throughout the day - from zero demand to peak demand.

Conventional screw compressors are not able to switch between operating modes according to a plant's current demand for compressed air. Owing to constant switching between loading/unloading modes or the idle running of compressors, conventional screw compressors consume consistently large amounts of electrical energy when operating.

The Comprag DV compressor series with frequency control has been created for economical compressor operation where there is varying demand.

DV compressors are provided with a frequency converter for continuous control of compressor output according to the current demand for compressed air. They provide a plant with the necessary amount of compressed air at a given moment and at a constant set pressure, while consuming only as much electrical energy as there is demand for compressed air. This mode of operation conserves as much energy as possible.

Comprag compressors with frequency control allow a 25% saving in electrical energy consumption.

Mechanism of compressor with frequency control:

Varying compressed-air demand involves a change in pressure in a plant's compressed-air system. A pressure sensor installed in the compressor brings about a change in system pressure by means of a corresponding signal sent to the compressor's controller. Via the frequency converter, the controller sets a speed for the electric motor to match the compressor's required output. In this way, the plant's compressed-air system pressure is kept at a constant value.

The frequency converter means that compressor start-up is associated with very low starting currents. This has a positive effect on the service life of the electrical motor and the electrics.

Professional controller
The controller v-Log controls operation of the compressor in automatic mode, and also provides the user with necessary information on the working pressure, temperature of the air oil mixture, compressor operation time, etc.
Reliable electric motor
DV-Series compressors are fitted with quality electric motors with a high efficiency coefficient and world-class bearings from leading manufacturers. The motors are not overloaded, but have a power reserve and overheat protection for windings.
Screw air-end
The screw block features a contemporary and energy-efficient rotor design. As the pair of screws rotates, the oil under the excess pressure forms a thin oil film between the rotating bodies. This ensures contactless rotation and the associated longevity.
Control valve
Control valves from our own production: minimal pressure loss and improved regulation of the relief time.

Downloads

Catalogue
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User manual
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