Atlas Copco XRHS 506 Instruction Manual page 17

Instruction Manual
Pressure vessels
Maintenance/installation requirements:
1 The vessel can be used as pressure vessel or as separator and is designed to hold compressed
air for the following application:
• pressure vessel for compressor,
• medium AIR/OIL,
• and operates as detailed on the data plate of the vessel:
• the maximum working pressure ps in bar (psi),
• the maximum working temperature Tmax in °C (°F),
• the minimum working temperature Tmin in °C (°F),
• the capacity of the vessel V in l (US gal, Imp gal, cu.ft).
2 The pressure vessel is only to be used for the applications as specified above and in accordance
with the technical specifications. Safety reasons prohibit any other applications.
3 National legislation requirements with respect to re-inspection must be complied with.
4 No welding or heat treatment of any kind is permitted to those vessel walls which are exposed
to pressure.
5 The vessel is provided and may only be used with the required safety equipment such as
manometer, overpressure control devices, safety valve, etc.
6 Draining of condensate shall be performed daily when vessel is in use.
7 Installation, design and connections should not be changed.
8 Bolts of cover and flanges may not be used for extra fixation.
Safety valves
Operating & Maintenance
Only trained and technically competent personnel should consider overhaul, re-set or performance
testing of safety valves.
The safety valve is supplied with either a lead security seal or crimped cover to deter unauthorised
access to the pressure regulation device.
Under no circumstances should the set pressure of the safety valve be altered to a different
pressure than that stamped on the valve without the permission of the installation designer.
If the set pressure must be altered then use only correct parts supplied by Seetru and in accordance
with the instructions available for the valve type.
Safety valves must be frequently tested and regularly maintained.
The set pressure should be periodically checked for accuracy.
When fitted, the lifting device should be operated at pressures not less than 75% of the set
pressure to ensure free and easy movement of internal parts.
The frequency of tests is influenced by factors such as the severity of the operating environment
and aggressiveness of the pressurised medium.
Soft seals and springs should be replaced as part of the maintenance procedure.
Do not paint or coat the installed safety valve.
(see also 4.5 Preventive maintenance schedule for the compressor).
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