LE & LT Series



LT 2-20

ATLAS COPCO OIL LUBRICATED PISTON COMPRESSOR

 

General Description

 

LT, a two-stage oil-lubricated reciprocating compressor designed for operation at maximum pressure of 15, 20, 30 bar (218, 290, 435, psi) and capacities from

  • 15 bar (218 psi) 3.1 up to 11.70 l/s at 50Hz, 7.6 to 23.1 cfm at 60 Hz
  • 20 bar (290 psi) 2.1 up to 18.80 l/s at 50Hz, 5.7 to 44.3 cfm at 60 Hz
  • 30 bar (290 psi) 2.5 up to 17.00 l/s at 50Hz, 6.6 to 41.7 cfm at 60

 

Working Principle

 

Filtered air is entered into one cylinder only. This low-pressure cylinder feeds the second (high- pressure) cylinder which increases the pressure to the required level, 15, 20 or 30 bar (281, 290 or 435 psi). In between the two stages, an intercooler brings down the compression temperature resulting in increased compression efficiency.

 

Scope of Supply

 

Drive arrangement

 

The standard drive arrangement is direct drive with electrical motor. However, the compressor block can also be directly driven by a hydraulic motor, diesel or petrol motor and kit is available for belt drive arrangement.

 

 

The standard electrical regulation occurs by means of pressure switch that starts/stops the compressor at pre-set pressures. Al units are also supplied with over load relay. In standard models, the cylinder heads are always de-pressurized if the units is stopped via pressure switch. On units with Direct on Line (DOL) start this is done through the pneumatic Unloader located inside the pressure switch box. Units with Y/D start are supplied with an Industrial Unloader Valve and Solenoid valve to de-pressurized the cylinder heads both stopping and starting the unit. Starting the compressor without backpressure in combination with special Y/D motor dramatically reduces start-up current. A cubicle is needed to manage the motor running between Y and D and to control the Industrial Unloader Valve.

 

L Block

 

  • Fan cooled intercooler
  • Simplified discharge pipe (LT 2-3)
  • Check valve (LT 5-7)
  • Pneumatic unloading (LT 10-15)
  • Splash pin lubrication system
  • Fan shroud
  • Dry type intake filter with venturi silencer
  • Safety valve
  • Discharge pulsation damper
  • Crank case breather
  • Temperature reducer
  • 40°C/104ºF maximum ambient operating temperature

 

 

 

 

 

 

 

 

L Power Pack

  • Compressor
  • TEFC flanged motor
  • Oil drain
  • Oil sight glass
  • Discharge muffler

 

 

 

 

 

 

 

L Base-Mounted or L Complete Unit

 

  • Compressor/power pack
  • TEFC flanged motor
  • Mounted on ASME tank
  • ASME safety/pressure relief valve
  • Oil drain
  • Oil sight glass
  • Discharge muffler
  • Pressure switch
  • Discharge valve

 

 

 

 

 

 

 

L Full Feature

  • L Complete Unit
  • Atlas Copco refrigerant dryer
  • Receiver 250 liter (1.5-4Kw)
  • Receiver 475 liter (4-7.5Kw)

 

 

 

 

L Trolley

 

  • L Power Pack
  • Mounted on special framework, with wheels and lifting bars
  • 2 x 10-liter receivers
  • Special pilot valve- operates in unload mode

 

 

 

 

 

Features & Benefits

 

Compact & Space Saving

  • Compressor block V shaped 2 cylinder directly coupled to the motor
    • Ideal for integration with limited space requirement
    • Low vibration and excellent cooling

Highest reliability

  • Renowned Experience
    • Engineered to wide variety of specific sectors such as marine and railway, certified by leading official classification
  • Robust Design
    • Extended product life, Straight forward maintenance and vast options for different applications

 

 

 

LE 3-20 Snow

ATLAS COPCO OIL LUBRICATED PISTON COMPRESSOR

 

General Description

 

LE Snow, a single stage oil-lubricated reciprocating compressor designed for operation at maximum pressure of 7 bar (101psi) and capacities from 5.0 up to 32.2 l/s at 50Hz, 12.7 to 81.7 cfm at 60 Hz.

Min. Working temperature -25°C

 

 

 

 

 

 

 

 

Working Principle

 

Filtered air is entered through the inlet valve into both cylinders. The piston is driven forward through the connection rod attached to the balanced crankshaft. The air is compressed in the cylinder that leaves through the outlet valve when the required pressure of 7 bar (101 psi) is reached.

 

Scope of Supply

 

Drive arrangement

 

The standard drive arrangement is direct drive with electrical motor.

Customized compressor for Snow application, reducing cooling section and with special air inlet connector from motor in order to increase inlet air temperature

 

Electrical Regulation

 

The standard electrical regulation occurs by means of pressure switch that starts/stops the compressor at pre-set pressures. Al units are also supplied with over load relay. In standard models, the cylinder heads are always de-pressurized if the units is stopped via pressure switch. On units with Direct on Line (DOL) start this is done through the pneumatic Unloader located inside the pressure switch box. Units with Y/D start are supplied with an Industrial Unloader Valve and Solenoid valve to de-pressurized the cylinder heads both stopping and starting the

 

 

 

 

unit. Starting the compressor without back pressure in combination with special Y/D motor dramatically reduces start-up current. A cubicle is needed to manage the motor running between Y and D and to control the Industrial Unloader Valve.

 

L Power Pack

  • Simplified discharge pipe
  • Check valve
  • Pneumatic unloading (LE10-15)
  • Splash pin lubrication system
  • Fan shroud
  • Dry type intake filter with venturi silencer
  • Safety valve
  • Crank case breather
  • Temperature reducer
  • 100% Duty cycle
  • 5°C/40ºF maximum ambient operating temperature
  • -25°C/-13°F minimum ambient operating temperature
  • Compressor
  • TEFC flanged motor
  • Oil drain
  • TEFC flanged motor
  • Closed motor
  • Cooling fan protection
  • Oil drain
  • Oil sight glass

 

 

 

 

 

 

 

 

Features & Benefits

 

Compact & Space Saving

  • Compressor block V shaped 2 cylinder directly coupled to the motor
    • Ideal for integration with limited space requirement
    • Low vibration and excellent cooling
    • Specific design for working at lowest ambient temperature

Highest reliability

  • Renowned Experience
    • Engineered to wide variety of specific sectors such as marine and railway, certified by leading official classification
  • Robust Design
    • Extended product life, Straight forward maintenance and vast options for different applications