ARI Armaturen ARI REYCO RL969 EN - Manual (Page 9)

Rev. 0040404000 4113 Page 2-9
Operating and installation instructions
ARI-REYCO R / RL Series
5.0 Installation
5.1 General notes on installation
The following points should be taken into account besides the general principles governing
installation work:
ATTENTION !
- Remove flange covers if present.
- The interior of valve and pipeline must be free from foreign particles
- Note installation position with reference to flow, see mark on valve.
- Steam line systems should be designed to prevent water accumulation
- Lay pipelines so that damaging transverse, bending and torsional forces are
avoided.
- Protect valves from dirt during construction work.
- Connection flanges must mate exactly.
- Connecting bolts for pipe flanges should be mounted preferably from the
counter flange side (hexagon nuts from the valve side).
- Valve mountings such as actuators, handwheels, bonnets must not be used to
take external forces, e.g. they are not designed for use as climbing aids, or as
connecting points for lifting gear.
- Suitable materials handling and lifting equipment should be used.
See data sheet for weights.
- The blow-off line shall be sufficiently large to ensure that the internal back-
pressure while blowing-off does not exceed 10% of the set pressure.
(Exception: safety valves with metallic bellow for back-pressure compensation).
- If back pressure exceeds 10% of set pressure, the safety valve must be fitted
with a metallic bellow seal for back pressure compensation. The maximum back
pressure must be specified by the manufacturer. If necessary a leak detector
should be provided to monitor the back pressure compensating metallic bellow
seal, but the leak detector must not block ventilation.
- The ventilation hole in the bonnet of safety valves with a metallic bellow seal
must remain open as a matter of principle, although in the case of Group I fluids
(PED 97/23/EC) a non-isolatable pipeline must be connected to remove the
medium safely (without back pressure if the bellow seal is damaged. Ventilation
must not be blocked by any leak detector used.
- No pipe sections or screws must protrude into the spring bonnet through the
inspection connection. Blockage hazard!
- The drainage system shall be adequate to remove the condensate.
- Blockage of the drainage system by dirt or foreign bodies shall be avoided.
- Freezing, sticking or blocking of the safety valve must be avoided at all costs. If
necessary use a heating jacket and/or stainless steel bellow with or without a
rupture disk.
- Safety valves shall be installed with upright spindle.
- Flange gaskets shall be fitted concentrically and not restrict the flow cross
section.
- Keep the shaft of the spindle-unit free from paint (open bonnet / cap).
- Blow-off lines shall be laid with gradient.