COMPRESSED AIR SYSTEMS - UNDERSTOOD

Pneutech Group

Phone 1800 PNEUTECH (763 883)

 

PR Series Variable Speed - 18 to 75kW

PRSeries Variable Speed rotary screw air compressors have all the features of the fixed speed models with the addition of Variable Speed Drive. These variable speed models are leading edge industrial machines which work on the principle of delivering a stable output pressure. They do this by varying rotary speed according to required air flow and therefore optimising energy consumption. The Variable Speed system results in substantial energy savings, longer service life, reduced runningnoise and minimum start-up current.

MODEL: PRO25-8V

Motor Power 18.5kW (25hp)
Free Air Delivery 580-2900L/min (19-102cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 73±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 36Amps/ph
Air Outlet 1-1/2"BSP
Air Treatment Optional
Overall Dimensions 1300L x 1100D x 1350Hmm
Weight 580kg

MODEL: PRO30-8V

Motor Power 22kW (29.5hp)
Free Air Delivery 700-3500L/min (25-124cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 73±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 39Amps/ph
Air Outlet 1-1/2”BSP
Air Treatment Optional
Overall Dimensions 1300L x 1100D x 1350Hmm
Weight 630kg

MODEL: PRO40-8V

Motor Power 30kW (40.2hp)
Free Air Delivery 1080-5400L/min (38-191cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 73±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 52Amps/ph
Air Outlet 1-1/2”BSP
Air Treatment Optional
Overall Dimensions 1450L x 1280D x 1450H mm
Weight 1050kg

MODEL: PRO50-8V

Motor Power 37kW (50hp)
Free Air Delivery 1300-6500L/min (46-230cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar(145psi) 12bar (174psi)
Noise Level 73±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 69Amps/ph
Air Outlet 1-1/2”BSP
Air Treatment Optional
Overall Dimensions 1450L x 1280D x 1450Hmm
Weight 1100kg

MODEL: PRO60-8V

Motor Power 45kW (60hp)
Free Air Delivery 1560-7800L/min (55-275cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 73±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 79Amps/ph
Air Outlet 1-1/2”BSP
Air Treatment Optional
Overall Dimensions 1450L x 1280D x 1450Hmm
Weight 1150kg

MODEL: PRO75-8V

Motor Power 55kW (74hp)
Free Air Delivery 1960-9800L/min (69-346cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 76±3dB(A)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 96Amps/ph
Air Outlet 2”BSP
Air Treatment Optional
Overall Dimensions 2200L x 1300D x 1750Hmm
Weight 1800kg

MODEL: PR100-8V

Motor Power 75kW (101hp)
Free Air Delivery 2500-12500L/min (88-441cfm)
Working Pressure 8bar (116psi)
Optional Pressures 10bar (145psi) 12bar (174psi)
Noise Level 10bar (145psi) 12bar (174psi)
Tank Volume N/A
Voltage 415V/50Hz/3ph
Current 125Amps/ph
Air Outlet 2”BSP
Air Treatment Optional
Overall Dimensions 2200L x 1300D x 1750Hmm
Weight 2000kg

PR Series Benefits Show all

Integrated Base Structure

PR Series compressors do not require special foundations at site due to their heavy duty base structure allowing greater flexibility in handling and installation.

High Efficiency Electric Motors

These motors conform to Minimum Energy Performance Standards, have low rotation speed for lower vibration and noise emission and have IP55 protection with F-grade insulation for longer service life.

Full Sound Enclosure

Full enclosure of the compressors by means of removable panels lined with sound-retarding insulation reduces overall sound levels and yet gives maximum accessibility to all components. Careful layout of components also adds to the convenience of keeping the machine clean for maximum reliability.

High Quality Thermostatic Valve

Sourced from AMOT in England this highly reliable valve ensures the stable operation of the compressor by controlling oil temperature. The mounting of this valve in the bottom of the oil filter decreases pressure loss, allows closer control of the oil temperature and reduces the chance of leakage by eliminating linking pipework and connections.

High Efficiency Oil Separator

The separator is fitted with a fine secondary element to improve oil separation and enhance output air quality. The unique seating and earthing of the separator element reduces the chance of fire caused by oil leakage and static electricity build-up.

Advanced Technology Air End

Featuring advanced high precision 5/6 lobe design. The optimized profile and seal line of this design are conducive to high efficiency and durability and ultimately minimise leakage to give improved volumetric efficiency. Large diameter rotors with low rotary speed and optimum aspect ratio ensure high output, lower power consumption, low noise levels and longer service life.

Patented Internal Layout

The internal layout of the compressors is divided into Hot and Cold Cells which are thermally isolated from each other to enhance heat dissipation and keep ancillary components cool for extended working life. This feature is patented.

Reliable Direct Action Solenoid Valve

Of quality German manufacture, the Burkert direct action solenoid valve is more sensitive and more reliable than traditional pilot operated solenoid valves making the control system more accurate and responsive.

Combined AC & Moisture Separator

By mounting the aftercooler and moisture separator together this clever design saves space and reduces costs by eliminating components and saving energy through improved air flow and reduced leakage. A further effect of the improved airflow is that the efficiency of the separator is increased resulting in further energy savings.

Less Connections

As a result of simplifying component sub-assemblies to minimise leakage due to pipe connections Pneutech PR Series compressors have up to 30% less pipework than similar products. A direct result of these simplifications is energy savings due to improved air flow and, in the longer term, due to the elimination of leakage.

Integrated Oil Filter & Thermostat Valve

This design decreases the number of installed pipes and connections thus reducing pressure losses and leakage points and resulting in energy savings. It also eliminates points where accidents can occur when connections have to be undone and resealed.

Combination Oil Cut-off & Exhaust Valve

The combination of these two valves simplifies mounting and facilitates connection. It also allows reduced load motor starting thereby saving energy and increasing the overall service life of the motor. This unique design removes any dead start issues under shut down and/or at low-temperatures and enables the compressor to operate reliably under a wider range of environmental conditions.

Multi-purpose Moisture Separator

Embodying German technology this separator effectively removes the condensate from the compressed air after it has passed through the aftercooler. Once the condensate in the separator reaches a certain level the auto drain is activated automatically to drain the condensate away, thus preventing clogging of the separator. Up to 70% of the moisture in the compressed air is removed by this means greatly improving the overall quality of the compressed air. Condensate build-up can also be drained manually during maintenance by using the manual drain valve at the base of the separator.

Local Controls

Local control settings within the overall compressed air system have the following features:

Easy to read displays, feather-touch controls, simple logic and convenient menu selection. Star/delta, start-up, loading and shut-down timers and the overpressure cut-out can all be set and controlled during operation. Detection and rectification of various faults or malfunctions can easily be done on site. Type and time of occurrence of all operational faults are recorded for subsequent reference. Inbuilt Service Calendar showing correct times of service intervals etc. Accumulative recording over extended periods of run hours, loaded hours, un-loaded hours and overall service hours of various filters and other consumables. Preset parameters and accumulated hours can be checked at any time during operation. Parameters can be revised and re-set by client.

Linked Multiple Compressors

Using the standard EPC intelligent controller built into every PR Series screw compressor, up to four compressors can be linked together to run sequentially. One compressor can be set as the main machine and the rest as auxiliary or standby machines. With special additional control components up to 16 compressors can be linked in this way. Such set-ups can be optimised to guarantee a stable and economic air supply. Furthermore, the start/up and shut-down sequences of the compressors can be automatically adjusted and the accumulated working hours of each compressor can be balanced by the EPC Electronic Control System to give maximum energy saving.

Features

The following features are included in some, but not necessarily all models:

  • High precision air ends with optimised 5/6 lobe design and large diameter rotors for improved volumetric efficiency, lower power consumption and longer service life.
  • Low rotor speed for low vibration and low noise, 68 – 70 d BA
  • High efficiency electric motors conforming to Minimum Energy Performance Standards, with low rotary speed for lower vibration and noise emission and with IP55 protection and Class F insulation for longer service life in industrial environments.
  • Innovative internal layout divided into thermally isolated hot and cold cells for optimum heat dissipation and cooler operation of ancillary components for longer service life.
  • Heavy duty base structure for ease of handling and installation.
  • Thermostatic oil temperature control for consistent compressor operation and maintenance of oil quality.
  • EPC Intelligent Control System for optimised fully automatic operation.
  • Linked operation capability for up to 16 compressors via central microprocessor controller for optimum energy management and air supply.
  • Up to 30% less pipe connections than other makes for energy savings due to improved air flow and reduced longer term losses due to leakage at joints.
  • Variable Frequency Drive or Inverter Driven options available on most models.

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