12
Original operation manual
2K GEL UNIT
2KGel_14025_25015_BAoDB_en_1701 • rs
Safety
2.4.1 Safety valve
Safety valves are located on the machine:
➤
in the air motor for the proportioning pump
➤
in the air motor for the flush pump (if present)
The safety valve prevents the maximum permissible air inlet pressure from
being exceeded. If the air inlet pressure exceeds the permanently set threshold
value, the safety valve discharges.
WARNING
If the maximum permissible air inlet pressure is exceeded, parts may
rupture. The consequences may be personal injuries and property damage.
➤
Never operate the machine without safety valves or with defective safety
valves!
➤
If it is necessary to replace a safety valve, please refer to the machine
card for the order number.
➤
With new safety valves, make sure that these are set to the maximum
permissible air inlet pressure of the machine (see type plate or machine
card) and sealed.
To check the function of a safety valve, briefly increase the air inlet pressure on
the system components monitored by the safety valve by approx. 10% above
the maximum permissible value according to the type plate — the safety valve
must discharge.
2.4.2 Compressed air shut-off valve
The compressed air shut-off valve on the proportioning pump interrupts the air
supply to the entire machine in the closed position. Furthermore, a compressed
air shut-off valve is located on the flush pump, with which the compressed air
supply of this pump can be interrupted.
The functional principle of all compressed air shut-
off valves installed on the machine is the same:
➤
Open
Position in the flow direction
➤
Close
Position transverse to the flow direction
Closed
Open
Fig. 2: Compressed air shut-off valve
After shutting off the air, the machine remains under pressure. It is therefore
necessary to fully relieve the pressure prior to any maintenance and repair
work!
2.4.3 Ground cable
The ground cable serves to prevent
electrostatic charging of the machine.
The ground cable is already connected to
the machine at the time of delivery (e.g. to
the high pressure filter, the grounding rail,
or the like).
Fig. 3: Ground cable
If the ground cable is lost or defective, it must be replaced immediately!
