3.3 Safety of Operation
The access into the area when a high pressure unit is working should be strictly prohibited to unauthorized personnel.
The area should be suitably enclosed and its perimeter, so far as is reasonably practical, cordoned off and proper
warning notices displayed in prominent positions.
Personnel authorized to enter that area should have been previously trained to do so and informed of the risks arising
from failures, misuse and any foreseeable circumstance which may occur during operation. Before starting the pump
unit and bringing it up to pressure the
Operator is requested to carry out the following checks:
1. Make sure that proper water is supplied to the pump and that it is properly powered(see chapter 9 par. 9.5)
2. Make sure that water inlet filters are properly clean.
3. Electrical components and wiring, with special emphasis on connections, junction boxes, switches and supply
cables should be free from external damage (i.e. exposed and broken wires) and adequately protected against
water.
4. High pressure hose should not show apparent external wear and the fittings at both ends should be free from signs
of erosion or corrosion.
5. Make sure that all fluids (lubricating oil for pump and engine, cooling water, hydraulic fluids) are at proper levels and
in good condition.
6. Attention: Outer surfaces may reach high temps, make sure the safety guards are in good condition.
The work should stop immediately and the pressure must be released in the event that leakage becomes apparent or
if any person becomes aware of an change in condition or any hazard existing or being introduced. Any failure must be
promptly reported and then checked personnel.
Page 4
Serial #10127003 and Later
HF SERIES
GENERAL PUMP
A member of the Interpump Group
3. SAFETY
3.1 General Warnings for Safe Operation
The misuse of a high pressure water unit and the non-observance of the pump installation and maintenance instructions
may cause serious damages and/or injuries to people or properties or both.
Any Manufacturer/Operator requested to assemble/use a high pressure water unit should be competent to do so, should
have the necessary knowledge on every high pressure component installed in the unit and on the precautions to be
taken in order to guarantee the largest safety margins during operation. No precaution, so far as is reasonably practical,
should be left out in the interest of safety, both from the Manufacturer and the Operator.
3.2 High Pressure Unit Safety Requirements
1. A safety valve should be installed in any delivery line and should be sized to discharge or by-pass the entire pump
flow rate.
2. High pressure unit components, with particular regard for those units working outside, should be adequately
protected against rain, frost and heat.
3. Electric components and wiring should be provided with an adequate degree of protection, able to protect them
against spray coming from any direction. They should also be suitable for working in a wet environment.
4. High pressure hoses and any other accessory under pressure should be sized in accordance with the maximum unit
working pressure and must always work within the safety margins indicated by the hose/ accessory Manufacturer.
5. High pressure hose ends should be fastened to a steady object in order to prevent them from dangerous sweeping
around, should they burst or come off their end fittings.
6. Proper safety guards should be provided to adequately cover transmission joints, pulleys, belts or auxiliary drives.
Ref 300764 Rev. F
05-21
