17
OPERATING MANUAL
VERSION 02/2018
ORDER NUMBER DOC 2366717
4.2.4 PRODUCT HOSES
Hazard due to bursting of product hose!
The product hose is under pressure and may cause dangerous injuries.
Ensure that the hose material is chemically resistant to the sprayed products and the
flushing agents used.
Ensure that the product hoses and the fittings are suitable for the pressure generated.
Ensure that the following information can be seen on the high-pressure hose:
– Manufacturer
– Permissible operating pressure
– Date of manufacture
Make sure that the hoses are laid only in suitable places. Hoses should not be laid in the
following places under any circumstances:
– in high traffic areas,
– on sharp edges,
– on moving parts or
– on hot surfaces.
Ensure that the hoses are never run over by vehicles (e.g., fork lifts), or that the hoses
are never put under pressure from the outside in any other way.
Ensure that the hoses are never kinked. Observe maximum bending radii.
Ensure that no work is ever performed with a damaged hose.
Make sure that the hoses are never used to pull or move the equipment.
The electrical resistance of the product hose, measured at both valves, must be less
than 1 MΩ.
Suction hoses may not be subjected to pressure.
Several liquids have a high expansion coefficient. In some cases their volume can rise with
consequent damage to pipes, fittings, etc. and cause fluid leakage.
When the pump sucks liquid from a closed tank, ensure that air or a suitable gas can enter the
tank. Thus a negative pressure is avoided. The vacuum could implode the tank (squeeze)
and can cause it to break. The tank would leak and the liquid would flow out.
The pressure created by the pump is a multiplication of the inlet air pressure.
