Atlas Copco ORV 10 Instruction Manual page 10

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
Potential hazards exist with the operation and maintenance of safety valves.
Hazards can include catastrophic failure of the protected pressurised system
resulting in death or serious injury or the emission of pressure medium, which
may be noisy, hot, poisonous or aggressive. Inappropriate handling may
present a risk of injury due to weight or sharp edges. Your attention is drawn
to our joint responsibility to ensure that all statuory National regulations
concerning Health and Safety including the Pressure Equipment Directive
97/23/EC are not contravened by incorrect installation, commissioning or
servicing. Refer also to ISO 4126 or contact Seetru if you require further
information regarding the use of safety valves.
Operating & Maintenance
Only trained and technically competent personnel should consider overhaul,
re-set or performance testing of safety valves.
Synthetic Component
Material
Nitrile
Neoprene
Viton
Butyl
Silicon
Fluoro Silicon
Other
8
X X
X
X
ORV 10 - ORV 12 - ORX 10 - ORX 12
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 4.1 Preventive maintenance schedule for the compressor).
Valve Outlet
The outlet of the discharge holes or pipe-work must not terminate in a
position where discharged gas will cause a hazard.
Outlet pipe-work should be as short and straight as possible and not allow an
accumulated back pressure to build up from a discharging safety valve of
greater than 10% of the set pressure.
Superimposed back pressure must not be allowed.
Outlet pipe-work should be supported to prevent mechanical loading of the
safety valve. A drain should be fitted to the lowest point of the outlet pipe-
work, which must be kept dry and clean to prevent blockage.
Control of Substances Hazardous to Health (COSHH) Data
A small quantity of synthetic rubber components may be present in the safety
valve. Synthetic rubber represents a hazard to health when subject to elevated
temperature (315°C) such as fire. It will show physical signs such as charring
or black sticky deposits, toxic and or corrosive fumes will also be given off.
Treat with extreme caution if it has been subject to fire. Allow to cool before
inspection. Avoid contact. Inform fire fighters of the presence of
fluoroelastomer material. Compliance with Environmental Protection Act is
essential when disposing of residue.
Air supply respirators and acid resistant gloves must be worn if the
above conditions apply.
X
X
X
X X
X
Residual Ash
X
X
X
X
X
X
X X