PIETRO FIORENTINI PVS 782 Technical Manual Download Page 1

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SAFETY/RELIEF VALVE

PVS 782

TECHNICAL MANUAL MT 014

INSTRUCTIONS FOR THE INSTALLATION, ENTRY INTO SERVICE

AND MAINTENANCE

| [email protected] | Phone: 877.566.3837 | Fax: 925.407.2903

www.mvandc.com

Summary of Contents for PVS 782

Page 1: ...1 SAFETY RELIEF VALVE PVS 782 TECHNICAL MANUAL MT 014 INSTRUCTIONS FOR THE INSTALLATION ENTRY INTO SERVICE AND MAINTENANCE sales mvandc com Phone 877 566 3837 Fax 925 407 2903 www mvandc com...

Page 2: ...F USE 3 0 COMMISSIONING 3 1 PRESSURIZZATION 3 2 INSPECTION OF THE EXTERNAL TIGHTNESS 3 3 INSPECTION OF THE INTERNAL TIGHTNESS 3 4 COMMISSIONING INSTALLATION ACCORDING TO DIAGRAM IN FIG 3 3 5 COMMISSIO...

Page 3: ...ations In FIGURE 1 the valve functional diagram is illustrated 1 1 MAIN SPECIFICATIONS The PVS 782 valves are safety accessories fit for the use on preliminary treated non aggressive gaseous fluids Su...

Page 4: ...4 Figure 1 sales mvandc com Phone 877 566 3837 Fax 925 407 2903...

Page 5: ...nection 10 connection pipe 11 spring 12 ring nut 13 safety diaphragm 14 rod 15 spring 1 2 VALVE CONTROL The PVS 782 valve is a pilot operated valve therefore the valve opening and closing operations a...

Page 6: ...6 Figure 2 sales mvandc com Phone 877 566 3837 Fax 925 407 2903...

Page 7: ...lues very near to the intervention values Until the controlled pressure is lower than the setting value the spring action 5 prevails on the value of the fluid thrusts on the diaphragm 4 and the plug p...

Page 8: ...the ring nut 12 inside the pilot and by using different springs according to the predetermined setting value The spring 11 allows the extra stroke of the spring diaphragm unit without loading the plug...

Page 9: ...e lifting devices are fit for the loads to be lifted lifting capacity and functionality The handling of the equipment shall be carried out by using the lifting eyes arranged on the equipment itself Th...

Page 10: ...justed at the required intervention value lead seals may be carried out at the factory directly by the manufacturer or on site by the user 2 3 SPECIAL INSTRUCTIONS Before installing the valve it is ne...

Page 11: ...rrange a protection end against water and nesting The connections to the inlet and outlet pipelines are carried out by means of standardized flanges the sizes and types of which are showed on the data...

Page 12: ...12 Legend of Figure Dimensioni d ingombro overall dimensions peso in kg weight in Kg sales mvandc com Phone 877 566 3837 Fax 925 407 2903...

Page 13: ...13 Figure 3 Not included in our supply Discharge to the atmosphere Cut off valve sales mvandc com Phone 877 566 3837 Fax 925 407 2903...

Page 14: ...14 Figure 4 sales mvandc com Phone 877 566 3837 Fax 925 407 2903...

Page 15: ...ls written on the plate is the following Safety valve valve model Cg flow rate coefficient where foreseen S n serial number PS max permissible pressure DN valve nominal diameter Flange type of flange...

Page 16: ...user shall take proper precautions in order to limit the effects of such events on the assembly when these are expected 3 0 COMMISSIONING 3 1 PRESSURIZATION After the installation check that the conn...

Page 17: ...ischarge the gas h very carefully carry on the previous operation until the valve opening i decrease the pressure and check that the pilot valve is close again and their tightness 3 5 COMMISSIONING IN...

Page 18: ...o the provisions in force on the place of installation and depending on the needs perform a preventive maintenance of the valve and of its pilot The periodical inspections concern also the state of th...

Page 19: ...in paragraph 5 4 3 REASSEMBLY Reassemble the parts by referring to the signs put on the parts during the disassembly so that all the connections match correctly 5 0 LUBRICATION The valves are already...

Page 20: ...ay from direct sun light in order to avoid a fast aging 7 0 SPARE PARTS For the spare parts please refer to the spare part lists SR 164 Valve PVS 782 SR 182 1 Pilot P 15 P 15 A SR 182 2 Pilot P 16 P 1...