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Pressure Regulators

Dival SQD-1

INSTALLATION ,COMMISSIONING

AND MAINTENANCE ISTRUCTIONS

TECHNICAL MANUAL

Summary of Contents for Dival SQD-1

Page 1: ...EN Pressure Regulators Dival SQD 1 INSTALLATION COMMISSIONING AND MAINTENANCE ISTRUCTIONS TECHNICAL MANUAL...

Page 2: ......

Page 3: ...3 Dival SQD 1 MT 234 E 02 2020 EN Poster Inlet pressure Outlet pressure Dival SQD 1...

Page 4: ...186 or EN 12279 in detail it is neces sary to meet the provisions of paragraphs 6 2 7 5 2 7 7 9 3 of the standard EN 12186 and 6 2 7 4 7 6 9 3 of the EN 12279 standard The installation in compliance w...

Page 5: ...1 Relief Valve 14 4 1 1 Direct installation in the line 14 4 1 2 Installation 15 5 0 START UP 15 5 1 General 15 5 2 Gas input control of external tightness and setting 16 5 3 Commissioning the regula...

Page 6: ...equal pressures acting on equal surfaces The movement of the diaphragm 9 is transmitted by the lever system 13 to the stem 9 and hence to the obturator 3 The obturator 3 is fitted with a vulcanized ru...

Page 7: ...mple from fast manoeuvres or gas overheating may let the slam shut valve trip the solution shown by fig 2a can be transformed upon request into an embedded relief valve eliminating the O ring 73 and a...

Page 8: ...13 18 64470024BI WITE 15 45 1 3 64470068GI YELLOW 34 115 2 19 25 64470031RO RED 15 40 1 7 64470139NE BLACK 34 115 2 2 26 35 64470031RO RED 15 40 1 7 64470140MA BROWN 34 106 2 7 36 65 64470031RO RED 1...

Page 9: ...s will be sufficien tly practicable see overall dimensions in Fig 3 Inlet and outlet pipings must be at the same level and able to carry the weight of the regulator see Fig 3 The inlet outlet flanges...

Page 10: ...S The connections between the apparatus and the main piping must be made using stainless steel or cooper pipe with minimum internal diameter of 8 mm Installation scheme Fig 4 Pressure regulator Contol...

Page 11: ...tor Vmax 15 m s ATTENTION 2 3 DOWNSTREAM VOLUME REQUIRED FOR INSTALLATION In the case of a service regulator of the ON OFF type stopping or starting of burners you should remember that though the SQD...

Page 12: ...12 Dival SQD 1 MT 234 E 02 2020 58 65 64 61 62 LA Slam shut Fig 7 EN INSTALLATION General Lay out Fig 6 Detail of manual button operated actuating de vice N B L O ring is used for specific version...

Page 13: ...e support 12 If the pressure Pd drops below the set point the spring 35 translates the support 13 to the right and with it the shaft 45 The cam shifts the feeler 33 and trips the lever mechanism 29 Th...

Page 14: ...e setting spring 20 The weight of the mobile as sembly the static thrust and the residual dynamic thrust on the obturator 4 also contribute to this contrast When the thrust deriving from the pressure...

Page 15: ...ately clockwise to increase the set point anticlockwise to reduce it Installation With On Off Valve Fig 10 5 0 START UP 5 1 GENERAL After installation check that the inlet outlet on off valves any by...

Page 16: ...e obtain using the setting spring fitted at the moment of testing Wdu range of intervention for pressure decrease of slam shut which can be obtain using the setting springs indi cated in the tables 5...

Page 17: ...through the pressure gauge 5 check that the downstream pres sure shows the wished calibration value Otherwise adjust the calibration acting on the proper internal ring nut fig 1 rotating it clockwise...

Page 18: ...hich intervene for pressure increase and reduction slowly increase the auxiliary ressure and record the intervention value Restore the pressure to the set point established for the regula tor and carr...

Page 19: ...piping gets completely full 9 It is advisable to check that activating the block valve manually the line capacity gets stopped 6 0 TROUBLE SHOOTING The problems of various kinds which could arise ove...

Page 20: ...agm 21 ruptured Change the diaphragm Leakage from slam shut obturator Obturator gasket 27 deteriorated Change the gasket O ring 166 worn Change Obturator seat 2 eroded or pitted Change the seat Incorr...

Page 21: ...assembly drawing SR of the apparatus We advise to replace all rubber made parts In order to do this please use the appropriate replacing kit N B Pietro Fiorentini S p A is in no case responsible in ca...

Page 22: ...am and downstream from it is 0 On the axis of the regulator tick with a permanent marker the joints of the different elements This action acts as a guide and help the later reassembling phase SQD 1 Pr...

Page 23: ...the tap 326 and the internal regulating clamp 318 Then take out the spring 328 Spring extractiong Fig 17 3 Remove the screws 314 that fix the low support cap 301 with the high support cap 312 Remove...

Page 24: ...E 5 Remove the screw nut 311 and extract the spring holder 31 6 Unscrew the screw nut 324 Nut extractiong Fig 21 7 Dismantle the protection disc 323 the membrane 322 and the membrane support 321 Membr...

Page 25: ...nd decreasing the correct functioning of the internal levers 305 Check internal levers Fig 23 9 Take the screws out 46 Screws extractiong Fig 24 10 Separate the head 300 and the balancing group 200 fr...

Page 26: ...o get the shaft 308 getting out of the loading joint 212 12 Unscrew the screw 214 from the obturator 211 and separate alll the components of the balancing group 200 13 Unscrew the valve seat from the...

Page 27: ...27 Dival SQD 1 MT 234 E 02 2020 EN MAINTENANCE 14 Unscrew the screws 48 15 Remove the slam shut valve with pad Slam shut screw extractiong Fig 29 Slam shut extractiong Fig 30...

Page 28: ...ce them It is necessary to make sure that the membrane 209 is perfectly inserted in its seat and that the movement of the shaft obturator group shows no obstruction You have to be very careful in mani...

Page 29: ...l Fig 32 7 3 FILTER REPLACEMENT 1 Unscrew and remove screws from cover Cover removal Fig 33 2 Pull out the cover EN MAINTENANCE Device status installed and disconnected from gas grid Authorized person...

Page 30: ...30 Dival SQD 1 MT 234 E 02 2020 IT MAINTENANCE 3 Pull out filter cartridge Filter cartridge replacement Fig 34...

Page 31: ...31 Dival SQD 1 MT 234 E 02 2020 EN MAINTENANCE Pressure regulator Fig 35 A A 19 19 13 13 43 43 28 28 34 34 9 9 3 3 2 2 33 33 46 46 48 48 166 166 566 566 V1 V1...

Page 32: ...MT 234 E 02 2020 EN MAINTENANCE 312 322 323 311 307 324 321 310 305 302 309 308 306 316 317 313 318 328 327 326 325 301 321 Standard head Fig 36 212 207 202 209 210 213 203b 204 214 211 208 206b 201...

Page 33: ...move the nut 37 and unscrew the nut 6 and the threaded bush 7 completely 8 From the upper part extract the shaft assembly consisting of the parts 9 66 19 4 and 8 the bushes 22 and 23 and 19 and the sh...

Page 34: ...pull the provided threaded bushing 7 off the slam shut until only the internal by pass is opened Pull completely to the re engage position 3 Check the tightness of the reinforced gasket of the regula...

Page 35: ...11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 41 B Adiustable spanner L 30 C Compass pin wrench Ch 8 9 10 11 12 13 14 15 16 17 18 19 20 24 26 27 36 46 D Hexagon or allen Key Ch 3 4 5 6 7 8 19 E...

Page 36: ...Via Enrico Fermi 8 10 36057 Arcugnano VI Tel 39 0444 968511 Fax 39 0444 960468 mail arcugnano fiorentini com www fiorentini com...

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PIETRO FIORENTINI Dival SQD-1, Technical Manual

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