The booster model HH2/77 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.

Technical Data
Performance 60 Hz (30 bar)
Speed (RPM) 900 1200
Capacity FAD (m³/h) 312* 390*
*FAD Capacity at 6 barg inlet pressure. For different speed, inlet- or outlet-pressure please contact Sperre. Capacity tolerance +/-5%.
Design
No. of cylinders 2
Cylinder arrangement 90° V
No. of compression stages 1
Cooling Direct driven axial fan
Valve Concentric plate valve
Dimensions & weight
Cylinder diameter 77 mm
Stroke 100 mm
Weight (compressor/el.motor) 600 kg
Lubrication
Sump capacity 10 litres
Lubrication system Splash
Operating parameters
Compressing medium Air / N2
Maximum delivery pressure 40 bar
Ambient temperature 45°C
Inlet pressure 4-8 bar
Normal temperature outlet air 15°C–30°C above ambient temperature
Maximum speed 1500 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 working pressure
Max. noise level 90 dBA
Max. vibration level 40 mm/s-RMS