Sperre Classic
Technical data
Overview
The Sperre Classic is the world’s most renowned maritime compressor. It has been perfected in demanding working conditions over decades. No wonder it is the most frequently chosen compressor on the world’s oceans.
Benefits
- Model LL2/90A is a one stage 90º V-compressor.
- Cylinders and compressed air coolers are air-cooled.
- Bearings and cylinders walls are splash lubricated. The compressor and motor are normally supplied mounted together and connected by means of a heavy-duty flexible coupling.
Performance
Specification
50 Hz (7-10 bar)
60 Hz (7-10 bar)
Speed (RPM)
1475
1750
Charging capacity (m³/h)*
68
86
Power requirement (kW)
9,3
12,4
Heat dissipation (kCal/h)
7198
9597
*Charging capacity is from ambient pressure to final pressure. Tolerance +/-5%.
Design
Specification
No. of cylinders
2
Cylinder arrangement
90° V
No. of compression stages
1
Cooling
Air
Valve LP
Reed valve
Dimensions & weight
Specification
Cylinder diameter LP
90 mm
Stroke
80 mm
Weight (compressor/el.motor)
290 kg
Lubrication
Specification
Oil type
Synthetic oil (see approved list)
Sump capacity
4 litres
Lubrication system
Splash
Operating parameters
Specification
Maximum delivery pressure
10 bar
Ambient temperature
45°C
Normal temperature outlet air
10°C–20°C above ambient temperature
Maximum speed
1800 RPM
Set point thermo switch air alarm/stop
75°C/80°C
Rotation
Anti-clockwise (looking at the drive end)
Safety valves set point
5–10% above stage pressure
Max. noise level
84 dBA
Max. vibration level
40 mm/s-RMS