PIETRO FIORENTINI NORVAL, Installation, Commisioning And Maintenance Instructions

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TECHNICAL MANUAL MT044
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2.1 GENERAL
Pressure regulator does not require any supplementary upstream safety accessory for protection against
overpressure compared with its design pressure PS, when upstream reducing station is sized for a max
downstream incidental pressure MIPd
≤
1,1 PS.
Before installing the regulator it is necessary to ensure that:
- the regulator can be inserted in the space provided and that subsequent maintenance operations will be
sufficiently practicable;
- the upstream and downstream piping is at the same level and capable of supporting the weight of the regulator;
- the inlet/outlet flanges of the piping are parallel;
- the inlet/outlet flanges of the regulator are clean and the regulator itself has not been subject to damage during
transport;
- the piping upstream has been cleaned to expel residual impurities such as welding scale, sand, paint residues,
water, etc.
The normally raccomended set-up is:
2.0 INSTALLATION
Fig. 2 (Standard Regulator) Fig. 3 (Upturned Regulator)
TAB. 3 CONNECTING THE APPARATUS
IN-LINE INSTALLATION
Regulator
Sensing line
Control pressure gauge
Bleed cock
On/Off valve
The connections between the apparatus and the main piping must be made using stainless steel or cooper pipe
with minimum internal diameter of 12 mm.