Product Manual

Protective and warning devices
7 Interfaces and function of the individual compo-
nents
7.1 Interfaces
7.1.1 Compressed air route
Dust is filtered from the intake air in the intake filter, and is then conducted through the intake regulator to
the compressor stage, where it is compressed and mixed with the Oil. It flows from there to the Oil pres-
sure tank. The compressed air enters the consumer network through the oil separator, the minimum pres-
sure valve and the compressed air aftercooler.
7.1.2 Functional description of the individual components in the compressed air
circuit
1. Intake filter
The intake filter is a dry filter made of paper. The maintenance interval is stored in the controller, and can
be changed if ambient conditions vary.
2. Intake regulator
When the system pressure falls, the intake regulator ensures a new supply of air to the compressor.
3. Compressor stage
The intake air is compressed by the compressor stage and is conducted to the Oil pressure tank to-
gether with the injected Oil.
4. Drive
The compressor stage is driven by an electric motor. This motor is installed on the base frame and drives
the main rotor of the compressor stage by means of 2 belt discs with the corresponding transmission
ratios. The motor is also controlled using a frequency converter to correspond to consumption on the FAS
SC 7 – 37 models.
5. Oil pressure tank
The Oil pressure tank is comprised of several components. The safety valve protects the Oil pressure
tank from overpressure. The inspection glass is used to check the Oil level. The Oil is topped up through
the filler nozzle and removed through the Oil drain. When at a standstill, the Oil level must be between
the upper and lower limit value in the inspection glass. Due to the large cross-section of the Oil pressure
tank, the flow rate of the Oil–air mixture is reduced, and this is where the majority of the Oil is separated
from the compressed air.