OFFICINE OROBICHE S.p.A.
Contents
1. GY y 5 Ng Nj N I 5 N ex Y Li 15 ha OG max max max 185 185 185 l g t Nu Code R3 Code R1 SPACE REQUIRED TO DISMOUNT HOUSING COVER X 340 HOUSING WITH SINGLE TRIPPING UNIT X 440 HOUSING WITH DOUBLE TRIPPING UNIT X 440 HOUSING WITH TRIPPLE TRIPPING UNIT 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I OO OFFICINE OROBICHE S p A 11 13 WP HOUSING WATER PROOF IP66 HOUSING FOR DOUBLE HOUSING FOR TRIPPLE TRIPPING UNIT TRIPPING UNIT SIDE VIEW OF HOUSING HOUSING FOR SINGLE 0134 OBL TRIPPING UNIT 013 w i Ens 2 E 230 230 RE NS e 200 T Z lt 1 S ii jJ l l Lu A j M lon eg 75 ge NIS I 1 5 me Lr Dum om aS max max 185 185 Code Code R3 Code R4 SPACE REQUIRED TO DISMOUNT HOUSING COVER X 320 HOUSING WITH SINGLE TRIPPING UNIT X 400 HOUSING WITH DOUBLE TRIPPING UNIT X 400 HOUSING WITH TRIPPLE TRIPPING UNIT WP HOUSING WITH CONNECTOR OUTPUT CONTATTO SPDT Codice CE CECI SPDT CONTACT Code AI BIC DIkEIF G 44A N2. OFFICINE OROBICHE S p A 1 13 USER S MANUAL FOR LEVEL SWITCHES of the electrical SERIES 40 1 INSTRUMENT DESCRIPTION The instruments of the 40 series are positive buoyancy level switches for mounting on vessel head They are equipped with various switching units to provide independent alarm and or signalling contacts Model 41A provides a low or high level alarm contact Model 41B is designed for pump control Model 41C is equipped with two independent alarm contacts Model 41D 1 is designed to control two pumps of different capacity For instance to allow a vessel to remain full if the level lowers the first small pump will be actuated but if the level continues to fall the second large pump will be started The large pump will be started and stops under the small pump s threshold The instrument can even be used to keep a tank empty in which case the operation of the two pumps is reversed Even model 41D 2 manages two pumps It is used to drain a vessel In this case the two pumps start at different levels but both only switch off after the level has reached the lower displacer Model 41D 3 combines the pump start and stop functions with a low level alarm Model 41D 4 combines the pump start and stop function with a high level alarm The instrument 41D 5 manages two pumps It is only used to fill a tank In this case the two pumps start at different levels but both only switch off after the level has reached the upper displacer
3. WP housing cover fastening group screw Always mention the instrument serial number in your request for spare parts This number is provided on the instrument rating plate that is fastened to the housing see Pos 12 and is a five digit number preceded by the letter F e g F45678 11 FAULT FINDING Level switches of the 40 series are not normally exposed to faults In cases when the level switch does not operate the switching carry out the test on the displacer and on the miniature switch as indicated in paragraph 7 MAINTENANCE 12 DISPOSAL When the instruments have come to the end of their service life they need to undergo disposal Always comply with the applicable regulations in force During the disposal stages specially mind the polymers resins and rubbers used in the manufacture PVC PTFE PP PVDF neoprene viton etc All metal parts after the removal of seals and gaskets special protective coatings requested by the customer and all other plastic parts can be recycled WARNING If the installed miniature switches are of the mercury bulb type code VD they must undergo disposal in compliance with the regulations currently in force for harmful poisonous materials Other types of miniature switches are not subject to these regulations 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to
4. s top 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I Ob OFFICINE OROBICHE S p A 5 13 450 min 450 min with 3 11 320 min with 4 85 Max 450 Min 450 min with 3 320 min with 47 i 3 DN80 75x215 Model 41B metallic C Dx Ps 0 8 0 85 0 9 0 95 1 0 HI 100 100 105 105 110 A DNIO x T80 mir gs 135 2140 31907 140 HI 125 135 140 150 150 LI 185 185 190 190 190 3 DN80 76x240 STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top Model 41B plastic C DxL P s 0 80 085 090 095 10 a DIO bein HI 64 78 90 101 111 L1 136 139 142 144 146 HI 90 109 126 142 155 LI 177 181 184 188 190 STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Inf
5. DN100 90x200 C Em E E a L2 90 101 110 118 3 Hl 79 150 162 194 LI 150 190 23 251 See NU en H2 66 86 148 197 L2 125 141 154 165 L1 STD rope length 3 m 450 min with 3 320 min with 4 Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I OFFICINE OROBICHE S p A Model 41E metallic C DxL P S 1 0 H1 60 icd LI 120 E H2 70 76x170 no ps 3 4 DN100 H3 70 L3 115 STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 320 min 320 min Model 41E plastic C QDxL PS 1 0 3 Hl 51 i Y LI 113 Z 3 DN80 E65 E H2 54 75x150 5 i05 E 4 DNI i i H3 60 L3 104 STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 270 min L3 24010 Ponteranica BG ITALY via Serena
6. Operation points as from the displacer s top 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I OFFICINE OROBICHE S p A 9 13 Model 41D plastic C s a as FUNZIONE 1 FUNCTION 1 FUNZIONE 2 FUNCTION 2 FUNZIONE 3 FUNCTION 3 65 3 s ef Si POMA 1 65 Lr ai 5 ON PUMP 1 ON START STOP PUMP TART STOP POMPA 12 Jp 12 Qu POMPA 1 12 T SARIL TOC REO m Qrr1 PUMP 1 POMPA 2 one POMPA 2 ie JN pump 2 u PUMP 2 L on LOW LEVEL OFF2 BASSO LIVELLO X FUNZIONE 4 FUNCTION 4 FUNZIONE 3 Z FUNCTION Zak an b POMPA 1 s PSU LOW LEVEL OFF PUMP 1 BASSO LIVELLO ON1 L3 L2 OFF POMPA 2 3 3 ON PUMP 2 on START STOP PUMP OFF START STOP POMPA p m T L3 Function 1 Function 2 Function 3 Function 4 Function 5 C DxL LI L2 18 u 2 3 bt 12 B Db B U 2 E3 4 U L B 3 DN80 75x215 131 129 112 131 129 104 170 75 164 72 80 4 DN100 90x150 91 90 81 91 9 72 122 52 117 50 5 I 3 DN80 ee 75x150 68 68 7 68 7 7 Note A 270 mm with Displacer 76x240 A 210 mm with Displacer 76x170 A 210 mm with Disp
7. 039 035 570546 www officineorobiche it e mail info officineorobiche it EE EF A I RKO IE EFC 2 0 EEEE EEEE EEEE EEEE EO EEEE EEEE EEE EEEE EEEE EEEE EEE EE EEEE EE EEEE EEEE EE EEEE EEE EEE EEEE EEEE EEEE EEE EEE EEE E EEEE EEE EEEE EEEE E EO ICSE CO COE IE JULY 05 Information subject to change without prior notice IST 153 I ob OFFICINE OROBICHE S p A 3 13 5 SETTING AT WORK Make sure that the use of the instrument does not exceed the intended conditions of use higher temperature and pressure values lower specific weight and that the applied electrical rated value complies with the rating plate values Verify that the instrument operates a correct switchover by making the fluid level vary a few times 6 CALIBRATION The adjustment of the tripping unit is performed by moving the displacer along the rope the instrument is equipped with Ensure you have firmly locked the displacer before introducing it into the vessel No adjustment shall be made on the tripping unit which is factory set 7 MAINTENANCE We suggest carrying out a periodic routine servicing once every 6 months approximately to ascertain the correct service state of the instrument All maintenance actions need to be carried out when the instrument is depleted of pressure and fluid at room temperature in the event of units working at high or low temperature and disconnected from the contact feeding voltage 7 1 WARNINGS NEVER open the lid without being sure that v
8. 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I OFFICINE OROBICHE S p A 8 13 Model 41D metallic 40 max FUNZIONE 1 FUNCTION 1 FUNZIONE 2 FUNCTION 2 FUNZIONE 3 FUNCTION 3 L1 Lf Lf Ej POMPA 1 ii ON PUMP 1 our START STOP PUMP START STOP POMPA 12 J Pret L2 Qu POMPA 1 12 T ik OFF1 PUMP 1 2 POMPA 2 ON POMPA 2 i B i PUMP 2 13 FF 2 PUMP 2 l4 ON2 LOW LEVEL OFF2 BASSO LIVELLO FUNZIONE 4 FUNCTION 4 FUNZIONE 5 FUNCTION Lt OFF POMPA 1 LOW LEVEL OFF PUMP 1 START STOP PUMP spen START STOP POMPA L4 BASSO LIVELLO ON1 L3 L2 OFF2 POMPA 2 al 0N2 PUMP 2 ON2 Function 1 Function 2 Function 3 Function 4 Function 5 e DL ETE DESC LEE 2 34 u EXT i a ee r r u u X3 3 DN80 76x240 105 103 106 105 103 78 143 87 174 85 3 l 4 DNIO 94x180 63 61 2 1 63 61 44 94 68 133 62 75 l 3 DN80 i pNioo 7070 Fe SB Se E A ELE NECESSARIE AES Note A 270 mm with Displacer 76x240 A 210 mm with Displacer 76x170 A 210 mm with Displacer 94x180 The operation points are calculated with specific weight IKg dcm STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L
9. O NC c 4B NO NC C 41C NO NC NO NC C e 4ID NO NC c NO NC C NOTA TERRA GROUNDING Codice Code C7 C8 C14 wn Ny i VITE MESSA A TERRA 1 2 GAS ROUNDIN REW UNI ISO 7 1 PrN PERE 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I OO OFFICINE OROBICHE S p A 12 13 10 RECOMMENDED SPARE PARTS VERSIONE PLASTICA VERSIONE METRLLICR PLASTIC VERSION METRLLIC VERSION POS DESCRIPTION LRSTIC VERSIO ETRLLIC VERSIO CUSTODIR WP m WP HOUSING E Flange body A 2 Spring protector 7 3 Displacer 10 4 Union n s 9l 5 Gasket i 6 Spring retainer 0 7 Rope c E D 8 Screws 49 9 9 Spring assembly ps Mus NO 10 Switch unit 11 Micro switches 12 Instrument nameplate 9 13 External grounding unit 14 Internal grounding unit 2 9 15 Housing gasket 16 Housing base T 17 Housing cover ZZ 18 EP housing cover fastening group screw BINT 19 WP housing base fastening group screw ral 20
10. OPERATING PRINCIPLE The operating principle is displacer based The displacer 1 partially or thoroughly immersed in the liquid undergoes a hydrostatic thrust the reduces the load on the spring 6 which being connected to a rod pushes a small magnetic piston upwards 2 On the pit 3 one or more tripping units are mounted which is schematised in the diagram composed of a magnet 4 and a miniature switch 5 that are connected to one another by means of levers In low level A condition the magnet 4 is idle in the high level B condition the magnet 4 is drawn by the piston 2 and this causes the actuation of the miniature switch 5 TRIPPING UNIT EO TRIPPING UNIT 4 2 GN ZA E Z2 The difference in height between low level and high level of the fluid is os called tripping differential The connection between the spring and the displacer is performed by means of a rope By moving the displacer along the rope the tripping position changes MN 1 DIFFERENTIAL BETWEEN HIGH AND LOW LEVELS 4 INSTALLATION 4 1 FITTING ON THE SYSTEM Before installing the unit check the vessel connections and those of the instrument for compatibility Burdening the instrument with external loads is strictly forbidden and it is the user s duty to protect it from stress using the system as a rest point is strictly forbidden To avoid the effects of g
11. The instruments are designed to be mounted on top of pressure vessels in a vertical position The adjustment of the operation points takes place by adjusting the position of the displacers along the instrument s rope The models can be equipped with SPDT or DPDT exchange contacts for a low or high level control and or alarm the contacts can be electric or pneumatic in type 2 MODEL IDENTIFICATION MODEL n 1 Group n 1 Group n 2 Group n 2 Group n 3 Group n 1 Displ n 2 Displ n 2 Displ n 3 Displ n J Displ A B C D E BODY MATERIAL CONTATCT TYPE Acc 304 316 PVC MOPLEN PVOF iG BULB BASE DC WATER A J P M PF current PROOF VD M2 M3 M4 DISPLACER MATERIAL s WATER PROOF ERMET SEALED PNEUMATIC 316 PVC MOPLEN PVDF golden cont with inert gas inox brass 6 PF M6 M14 x STD internal parts AISI 316 l CONTACT HOUSING l SPDT DPDT Water Proof EEx d WP EP EER FINNING L eg ss p NON STD VERSION 41 A JA e WP e R1 XX 24010 Ponteranica BG ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to changes without prior notice IST 153 I OO 2 13 OFFICINE OROBICHE S p A 3
12. alvanic corrosion no use of materials featuring different electrochemical potential is allowed The user shall apply all the technical expedients that are aimed at safeguarding the unit from such occurrence The system shall be equipped with the prescribed safety valve to avoid overpressures that exceed the limit value The instruments shall be installed in vessels equipped with stilling pipe displacer guide A Before actuating the instrument ensure that the stilling Tube is perfectly upright and has a diameter that suits the displacer about 5 mm of air around the displacer Ensure that the connection to the tank is horizontal And perpendicular to the stilling pipe Adjust the rope length to that of the vessel and Place the displacer at the desired height For installation on vessels that are exposed to strong vibration please contact our customer service department 4 2 ELECTRICAL WIRING The instrument is equipped with a terminal block located inside the housing For connections NC C NO please refer to the drawing provided on this page Make sure the housing lid is closed before injecting voltage The user shall provide for suitable ground connections to protect the working staff and any other equipment possibly present VERSIONE SPDT VERSIONE DPDT Id s l No c Nc No c NC NO NORMALLY OPEN C COMMON NC NORMALLY CLOSED 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0
13. change without prior notice IST 153 I ob OFFICINE OROBICHE S p A 13 13 13 GUARANTEE All the switches parts of the 40 series are guaranteed to be free from manufacturing faults over a period of 12 months from the date of shipment In the event of failures implying return of goods within the limit specified above OFFICINE OROBICHE vwill replace shipment fees not included all damaged parts free provided that the failure does not ensue from incorrect use OFFICINE OROBICHE shall never be held responsible for any incorrect use of their products when these are used for purposes other than those mentioned in the specifications approved at the order stage In these cases no complaints will ever be taken into consideration No damage and or fee whether direct or indirect ensuing from an incorrect installation or use shall ever be debited to OFFICINE OROBICHE The instrument can be used for a maximum life period of 10 years dating from delivery When this period is over there are two alternative options 1 Replace it with a new instrument 2 Have the old instrument overhauled by OFFICINE OROBICHE INSTRUMENT RETURN PROCEDURE The instrument returning to the factory shall bear in attachment the following data 1 Buyer s name 2 Description of the material 3 Detected fault 4 Process data 5 Specification of the fluids that have been used with the instrument The instrument shall be returned perfectly clean and free from dust or deposit
14. lacer 94x180 The operation points are calculated with specific weight IKg dcm STD rope length 23 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it EE EF A I RKO IE EFC 2 0 EEEE EEEE EEEE EEEE EO EEEE EEEE EEE EEEE EEEE EEEE EEE EE EEEE EE EEEE EEEE EE EEEE EEE EEE EEEE EEEE EEEE EEE EEE EEE E EEEE EEE EEEE EEEE E EO ICSE CO COE IE JULY 05 Information subject to change without prior notice IST 153 I O OD OFFICINE OROBICHE S p A 10 13 9 DIMENSIONAL DRAWINGS OF THE HOUSING CODE FLUID TEMPERATURE ELECTRICAL CONNECTIONS A g 10 135 EP WP R3 1 2 NPT RI 4136 4250 3 4 NPT 3 4 NPT R4 251 400 1 2 UNI 6125 _ 1 2 GAS ISO 228 1 3 4 UNI 6125 _ 3 4 GAS ISO 228 1 ISO M20x L5 1 2 UNI 6125 ISO M20 x 1 5 EP HOUSING EEx d IIC T6 HOUSING FOR DOUBLE HOUSING FOR TRIPPLE TRIPPING UNIT TRIPPING UNIT SIDE VIEW OF HOUSING HOUSING FOR SINGLE p TRIPPING UNIT T ano ES jl T SSS INSTRUMENT NAMEPLATE
15. nit and check that the whole set can freely slide If the spring shows corrosion marks replace the parts 7 3 REPLACING THE DISPLACER AND OR THE ROPE After pulling the displacer out see par 7 2 hold the damaged displacer in place unscrew the screw that locks it to the rope Place the new displacer remember to lock it tightly to the rope If the rope shows marks of breaks it needs replacing by unscrewing the screw that locks it to the instrument The new rope it too long needs to be cut at the required length Remember to tightly lock the new rope before fitting the instrument back in place Perform all the checks as mentioned in paragraph 7 2 7 4 ROUTINE CHECKS ON THE CONTACTS Discontinue the voltage supply With the lid open perform a sight check to ensure that the tripping unit does not have damaged or aged parts manually actuate the magnet to test whether the miniature switch correctly performs the switchover 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I O Ol OFFICINE OROBICHE S p A 4 13 7 5 REPLACING THE ASSEMBLY AND OR MINIATURE SWITCH a Use a gauge to measure the position of the switching unit b Remove the wires from the terminal block note the original connections by loosening the screw 2 and remove the switching unit c Re
16. oltage has been discontinued NEVER leave the case without its lid for longer than the inspection time NEVER use the instrument at a temperature or a pressure that exceeds the values specified on the rating plate NEVER use the instrument at an electrical rating that exceeds the value specified on the rating plate NEVER perform settings or replace parts without having read the instructions beforehand in case of doubts please contact our customer service department NEVER lubricate any part of the instrument In cases when the instrument is used at high temperature values always take all the precautionary measures required to safeguard the working staff during the maintenance work stages 7 2 ROUTINE CHECKS ON THE DISPLACER Ensure the vessel is drained of all liquid Separate the instrument from the vessel by unscrewing the related bolts Extract the displacer by lifting the body flange take care not to spoil or damage the rod the displacer and the spring Inspect the stilling tube and check it is clean from incrustation and or deposit if any such deposits are found perform a thorough cleaning Remove the union and take care not to fold the rod Inspect the pit inside making sure it is free from incrustation clean with care if necessary Place the union back in place Ensure that the displacer the rod and the spring are free from incrustation carefully clean if necessary Manually lift and lower the spring u
17. ormation subject to change without prior notice IST 153 I 450 min 320 min with 4 Ol OFFICINE OROBICHE S p A STD rope length 3 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer s top 6 13 Model 41C metallic C QDxL PS 0 78 0 8 10 83 0 85 085 09 095 10 HI 63 70 78 84 65 75 85 100 LI 120 125 132 136 115 125 135 150 TOS DINI C9 E80 Os o87 89 92 94 85 90 95 100 L2 134 135 136 137 130 135 135 140 H1 8 90 103 110 80 100 115 135 Ll 157 164 174 180 150 165 180 195 SP DINGO 105240 Ea 445 118 322 194 a 190 430 135 L2 176 178 180 181 175 175 180 185 E C QDxL PS LO 105 11 LI5 12 125 2 HI 60 70 80 90 100 110 E LI 105 115 125 125 140 150 gt IRN i T CDNIOO 94x180 7 3 60 65 70 75 80 80 E L2 100 105 105 110 115 115 Es Hl 75 90 105 120 135 145 e LI 135 150 165 175 185 195 ST DING TORE A a 80 11 85 1 95 1007 5105 110 L2 130 135 140 145 150 155 Model 41C plastic E 1 C DxL Ps 10 11 12 13 HI 55 86 112 134 5 LI 107 135 158 177 i 4
18. place the miniature switch 1 d Place the switching unit back on top of the pit 3 in the same position as measured before e Perform the tripping adjustment by manually positioning the magnet 4 against the pit 3 screw on the grub screw 5 until the miniature switch triggers and provide an over stroke turn before tightening the grub screw f Check miniature switch 1 for proper operation by means of an ohmmeter and carry out some manual trip tests g Reconnect the wires back into the terminal block as in b above 7 6 SETTING THE OPERATION POINT See paragraph 6 CALIBRATION 8 DIMENSIONAL DRAWINGS OF THE BODY Model 41A metallic amp sj C QDxL PS 06 065 07 0 75 08 85 09 095 1 0 ADO e SOR NEW M aes a see ies esta an IT T dis M SET C mo tas ms ies es o 100 C pxL_ PS 1 0 105 11 115 12 125 13 135 14 EONO 94580 re sa das tas so 50 9 190 190 d HR ORDRE ACEC MC CLE Model 41A plastic ee og pH S 4 DN100 A LI 146 164 174 181 185 ee oe a ee 450 Min STD rope length 23 m Dimensional values to be specified on the order C Connection flange D L Displacer size H L Operation points as from the displacer
19. s Otherwise OFFICINE OROBICHE reserve the right not to carry out the servicing and return the instrument to the sender FINAL REMARKS Each instrument is supplied fully assembled and equipped with all the needed accessories Some parts are sold separately under special circumstances only Therefore we warn you to carefully inspect the supply and notify us at once if discrepancies are found N B IN CASES WHEN THE INSTRUMENTS ARE MEANT TO BE USED IN AREAS FEATURING POTENTIALLY EXPLOSIVE ATHMOSPHERES THE USER SHALL COMPLY WITH THE ADDITIONAL SAFETY INSTRUCTIONS ATTACHED TO THE STANDARD ONES 24010 Ponteranica BG ITALY via Serena 10 Phone 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Information subject to change without prior notice IST 153 I
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