PIETRO FIORENTINI FEX Series User manual

Serie FEX
Revisione 00 - Edizione 05/2022
USE, MAINTENANCEUSE, MAINTENANCE
AND WARNINGAND WARNING
INSTRUCTIONSINSTRUCTIONS
Low-pressure gas regulator
EN

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1 - INTRODUCTION
FOREWORD
All rights reserved. No part of this publication may be reproduced, distributed, translated into other languages or trans-
mitted by any electronic or mechanical media, including photocopies, recording or any other storage and retrieval system,
for any other purposes that are not exclusively the personal use of the buyer, without the express written permission of
the Manufacturer.
The manufacturer is in no way responsible for the consequences of operations carried out in a manner not in accordance
with the manual.
GENERAL REMARKS
All the operating, maintenance instructions and recommendations described in this manual must be adhered to in order to:
• obtain the best possible performance from the equipment;
• keep the equipment in efcient conditions.
Training the personnel in charge is essential in order to:
• properly use the equipment;
• correctly apply the safety alerts and procedures recommended.
Revision: 00
COPYRIGHT 2022
© PIETRO FIORENTINI S.P.A.

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1.1 - REVISION HISTORY
Revision
index Date Revision contents
00
Tab. 1.1.

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INDICE
1 - INTRODUCTION .................................................................................................................. 3
1.1 - REVISION HISTORY.................................................................................................................................. 5
2 - GENERAL INFORMATION .................................................................................................. 9
2.1 - MANUFACTURER IDENTIFICATION.......................................................................................................... 9
2.2 - IDENTIFICATION OF THE PRODUCT ........................................................................................................ 9
2.3 - REGULATORY FRAMEWORK................................................................................................................... 9
2.4 - WARRANTY.............................................................................................................................................. 9
2.5 - ADDRESSEES, SUPPLY AND STORAGE OF THE INSTRUCTION MANUAL........................................... 10
2.6 - LANGUAGE ............................................................................................................................................ 10
2.7 - SYMBOLS USED IN THE MANUAL......................................................................................................... 11
2.8 - NAMEPLATES APPLIED ......................................................................................................................... 12
2.8.1 - GLOSSARY FOR NAMEPLATES ...........................................................................................................14
2.9 - GLOSSARY OF MEASUREMENT UNITS................................................................................................. 15
2.10 -QUALIFIED PROFESSIONAL FIGURES................................................................................................... 16
3 - SAFETY .............................................................................................................................. 17
3.1 - GENERAL SAFETY WARNINGS.............................................................................................................. 17
3.2 - PERSONAL PROTECTIVE EQUIPMENT.................................................................................................. 18
3.3 - RESIDUAL RISKS ................................................................................................................................... 19
3.3.1 - TABLE SHOWING RESIDUAL RISKS DUE TO PRESSURE ...................................................................20
3.3.2 - TABLE OF RESIDUAL RISKS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES ...................................22
3.4 - OBLIGATIONS AND PROHIBITIONS ....................................................................................................... 24
3.5 - SAFETY PICTOGRAMS .......................................................................................................................... 25
3.6 - RISK LEVEL ............................................................................................................................................ 25

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4 - DESCRIPTION AND OPERATION .................................................................................... 27
4.1 - GENERAL DESCRIPTION ....................................................................................................................... 27
4.2 - OPERATION............................................................................................................................................ 28
4.3 - INTENDED USE ...................................................................................................................................... 29
4.3.1 - ENVISAGED USE ..................................................................................................................................29
4.3.2 - REASONABLY FORESEEABLE MISUSE ...............................................................................................29
4.3.3 - TYPES OF FLUIDS................................................................................................................................29
4.4 - MODELS AND CONFIGURATIONS ......................................................................................................... 30
4.4.1 - SURFACE TREATMENTS ......................................................................................................................31
4.5 - TECHNICAL FEATURES/PERFORMANCE .............................................................................................. 32
4.6 - SAFETY DEVICES................................................................................................................................... 33
4.6.1 - SLAM-SHUT VALVE FOR MINIMUM AND MAXIMUM DOWNSTREAM PRESSURE ..............................33
4.6.2 - RELIEF VALVE.......................................................................................................................................34
4.6.3 - PRESSURE OUTLET.............................................................................................................................35
4.6.3.1 - PROCEDURE OF USE WITH STANDARD PRESSURE OUTLET ...................................................36
4.6.3.2 - PROCEDURE OF USE WITH PETERSON MODEL PRESSURE OUTLET ......................................37
5 - TRANSPORT AND HANDLING......................................................................................... 39
5.1 - SPECIFIC WARNINGS FOR TRANSPORT AND HANDLING ................................................................... 39
5.1.1 - PACKAGING AND FASTENERS USED FOR TRANSPORT ....................................................................40
5.2 - STANDARD FEX PHYSICAL CHARACTERISTICS ................................................................................... 41
5.2.1 - PHYSICAL CHARACTERISTICS FEX WITHOUT SLAM-SHUT VALVE....................................................42
5.3 - EQUIPMENT ANCHORING AND LIFTING METHOD................................................................................ 43
5.3.1 - FORKLIFT HANDLING METHOD...........................................................................................................44
5.4 - PACKAGING REMOVAL.......................................................................................................................... 46
5.4.1 - PACKAGING DISPOSAL .......................................................................................................................46
5.5 - STORAGE AND ENVIRONMENTAL CONDITIONS .................................................................................. 47
5.5.1 - STORAGE LASTING LONGER THAN THE MAXIMUM TIME ALLOWED................................................47
6 - INSTALLATION .................................................................................................................. 49
6.1 - INSTALLATION PRE-REQUISITES........................................................................................................... 49
6.1.1 - ALLOWED ENVIRONMENTAL CONDITIONS.........................................................................................49
6.1.2 - STORAGE LASTING LONGER THAN THE MAXIMUM TIME ALLOWED................................................49
6.1.3 - CHECKS BEFORE INSTALLATION........................................................................................................50
6.2 - SPECIFIC SAFETY INSTRUCTIONS FOR THE INSTALLATION STEP ...................................................... 51
6.3 - GENERAL INFORMATION ON THE LINE ................................................................................................ 52
6.4 - INSTALLATION PROCEDURES............................................................................................................... 53
6.4.1 - POST-INSTALLATION INSTRUCTIONS..................................................................................................54
6.5 - EQUIPMENT ADJUSTMENTS................................................................................................................. 55

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7 - COMMISSIONING ............................................................................................................. 57
7.1 - GENERAL WARNINGS ........................................................................................................................... 57
7.1.1 - SAFETY REQUIREMENTS FOR COMMISSIONING ...............................................................................57
7.2 - PRELIMINARY PROCEDURES FOR COMMISSIONING .......................................................................... 58
7.3 - CALIBRATION OF SAFETY DEVICES...................................................................................................... 58
7.4 - COMMISSIONING THE REGULATOR ..................................................................................................... 58
7.4.1 - COMMISSIONING OF THE REGULATOR WITH SLAM-SHUT VALVE ....................................................59
7.4.2 - COMMISSIONING OF THE REGULATOR WITHOUT SLAM-SHUT VALVE .............................................60
7.5 - PROPER COMMISSIONING CHECK ...................................................................................................... 61
7.6 - RESET OF SAFETY DEVICES AFTER COMMISSIONING ........................................................................ 61
7.7 - DRUM ASSEMBLY (UNDERGROUND VERSION OF THE REGULATOR)................................................. 62
7.7.1 - DRUM ASSEMBLED TO THE SLAM-SHUT VALVE COVER...................................................................62
7.7.1.1 - REGULATOR RESET ....................................................................................................................63
7.7.2 - DRUM FIXED ON THE SECOND STAGE CONTROL HEAD ...................................................................64
8 - FUNCTIONAL CHECKS .................................................................................................... 65
8.1 - GENERAL WARNINGS ........................................................................................................................... 65
8.2 - PERIODICALLY CHECKING AND INSPECTING THE EQUIPMENT FOR PROPER OPERATION .............. 66
8.2.1 - FUNCTIONAL CHECKS OF SAFETY DEVICES......................................................................................66
8.3 - TIGHTENING TORQUES......................................................................................................................... 68
9 - UNINSTALLATION AND DISPOSAL ................................................................................. 69
9.1 - GENERAL SAFETY WARNINGS.............................................................................................................. 69
9.2 - QUALIFICATION OF THE OPERATORS IN CHARGE............................................................................... 69
9.3 - UNINSTALLATION................................................................................................................................... 69
9.4 - INFORMATION REQUIRED IN CASE OF NEW INSTALLATION................................................................ 70
9.5 - DISPOSAL INFORMATION...................................................................................................................... 70
10 - TABELLE DI TARATURA ................................................................................................... 71
10.1 -TABELLE DI TARATURA.......................................................................................................................... 71

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2 - GENERAL INFORMATION
2.1 - MANUFACTURER IDENTIFICATION
Manufacturer PIETRO FIORENTINI S.P.A.
Address
Via Enrico Fermi, 8/10
36057 Arcugnano (VI) - ITALY
Tel. [phone] Fax [phone]
www.orentini.com sales@orentini.com
Tab. 2.2.
2.2 - IDENTIFICATION OF THE PRODUCT
Equipment LOW-PRESSURE GAS REGULATOR
Series FEX
Available models
• FEX50
• FEX75
• FEX100
Tab. 2.3.
2.3 - REGULATORY FRAMEWORK
PIETRO FIORENTINI S.P.A. with registered ofces in Arcugnano (Italy) - Via E. Fermi, 8/10, declares that the equipment of
SERIE FEX described in this manual is designed, manufactured, tested and checked in compliance with the requirements
of standards: UNI 11655:2016, UNI EN 16129:2013 where applicable.
NOTICE!
For specic type approvals, see the appropriate section on the Manufacturer’s website: https://www.orentini.com
NOTICE!
The declaration of conformity in its original version is delivered together with the equipment and this manual.
2.4 - WARRANTY
PIETRO FIORENTINI S.P.A. guarantees that the equipment was manufactured using the best materials, with high quality
workmanship, and complies with the quality requirements, specications and performance set out in the order.
The warranty shall be considered null and void and PIETRO FIORENTINI S.P.A. shall not be liable for any damage and/or
malfunctions:
• due to any acts or omissions of the purchaser or end-user, or any of their carriers, employees, agents, or any third
party or entity;
• in the event that the purchaser, or a third party, makes changes to the equipment supplied by PIETRO FIORENTINI S.P.A.
without the prior written approval of the latter;
• in the event of failure by the purchaser to comply with the instructions contained in this manual, as provided by
PIETRO FIORENTINI S.P.A.
NOTICE!
The warranty conditions are specied in the commercial contract.

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2.5 - ADDRESSEES, SUPPLY AND STORAGE OF THE INSTRUCTION MANUAL
The instruction manual is intended for qualied technicians responsible for operating and managing the equipment
throughout its service life.
It contains the necessary information to properly use the equipment and keep its functional and qualitative characteristics
unchanged over time. All information and warnings for safe, correct use are also provided.
The instruction manual, as well as the declaration of conformity and/or test certicate, is an integral part of the equipment
and must always accompany it whenever it is moved or resold. It is up to the user to keep this documentation intact for
reference throughout the lifespan of the equipment.
WARNING!
Removing, rewriting or editing the pages of the manual and their contents is not allowed.
Keep the instruction manual near the equipment, in an accessible place known by all qualied technicians
involved in using and running it.
PIETRO FIORENTINI S.p.A. shall not be held liable for any damage to people, animals and property caused
by failure to adhere to the warnings and operating procedures described in this instruction manual.
2.6 - LANGUAGE
The original instruction manual was drawn up in Italian.
Any translations into additional languages are to be made from the original instruction manual.
HAZARD!
The translations into other languages cannot be fully veried. If any inconsistency is found, please refer to
the original instruction manual.
If inconsistencies are found or the text does not make sense:
• stop any actions;
• immediately contact PIETRO FIORENTINI S.p.A. at the addresses specied in paragraph 2.1.
WARNING!
PIETRO FIORENTINI S.p.A. shall be held liable for the information provided in the original manual only.

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2.7 - SYMBOLS USED IN THE MANUAL
Symbol Denition
Symbol used to identify important warnings for the safety of the operator and/or equipment.
Symbol used to identify information of particular importance in the instruction manual.
The information may also concern the safety of the personnel involved in using the equipment.
Obligation to refer to the manual.
Indicates a requirement for the personnel to refer to (and understand) the instruction manual
before working with or on the equipment.
Tab. 2.4.
HAZARD!
Alerts to a hazard with a high level of risk, an imminent hazardous situation which, if not prevented, will
result in death or severe damage.
WARNING!
Alerts to a hazard with a medium level of risk, a potentially hazardous situation which, if not prevented,
may result in death or severe damage.
ATTENTION!
Alerts to a hazard with a low level of risk, a potentially hazardous situation which, if not prevented, could
result in minor or moderate damage.
NOTICE!
Alerts to specic warnings, directions or notes of particular concern, that are not related to physical injury,
as well as practices for which physical injury is not likely to occur.

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2.8 - NAMEPLATES APPLIED
WARNING!
Removing nameplates and/or replacing them with other plates is strictly not allowed.
Should the plates be unintentionally damaged or removed, the customer must notify
PIETRO FIORENTINI S.p.A.
The equipment and its accessories are provided with nameplates (from Id.1 to Id.9).
The nameplates specify identication details of the equipment and its accessories to be provided, if necessary, to
PIETRO FIORENTINI S.p.A.
List of the nameplates applied:
Id. Type Image
1STANDARD LABEL
2LABEL FOR RUSSIA
3LABEL FOR POLAND
4LABEL
SAFETY DIAPHRAGM
5LABEL
LOW TEMPERATURES

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Id. Type Image
6LABEL FOR TURKEY
7LABEL
TEMPERATURE -30 °C
8LABEL FOR ROMANIA
9LABEL FOR SPAIN
KROMS
Tab. 2.5.

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2.8.1 - GLOSSARY FOR NAMEPLATES
The terms and abbreviations used on nameplates are described in Tab. 2.7.:
Description
Label terms
Standard Russia Poland Turkey Romania Spain
Kroms
Inlet pressure range bpu bpu Pe Pg
max/min -bpu
Adjusted pressure pds Pd Pa Pç - Pd
Tripping pressure
maximum pressure slam-shut device
Slam-shut device
VIS
Slam Shut
pdso
ЛЗК Макс
Pdso Zaw.up. EBÜ -
Slam-shut device
VIS
Slam Shut Pdso
Pdsu
Tripping pressure
minimum pressure slam-shut device
Slam-shut
device
VIS
Slam Shut
pdsu
ЛЗК МИН
Pdsu
Zaw.szy-
bkz. EBA -
Slam-shut
device
VIS
Slam Shut
Pdso
Pdsu
Minimum nominal ow rate Q pumin -- Q min/max - Q Pumin
Maximum nominal ow rate Q pumax -Q max Q min/max - Q Pumax
Regulator model Reg. per. Type - FE Reg.
Regulator production lot P.L. ДАТА P.L. Data +
barcode Year P.L.
Regulator serial number S.N. С.н. No. barcode - S.N.
Regulator nominal ow rate -Nom Q - - - -
Inlet connections --DNe - DN /
Connection -
Outlet connection --DNa - DN /
Connection -
Operating temperature range --T3 - T -
Accuracy class --- ÇT - -
Shut-off class --- KT - -
Maximum pressure slam-shut device Accuracy Group ---ETA - -
Minimum pressure slam-shut device Accuracy Group --- ETÜ - -
Regulator head range --- As - -
Calibration spring range --- - Wds -
Maximum pressure slam-shut device spring range --- EBÜ - -
Minimum pressure slam-shut device spring range --- EBA - -
Design pressure --- - PS -
Type of uid N.G. -- - Fluid -
Relief calibration --- - -
Relief
VAS
Relief Valve
Tab. 2.6.

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2.9 - GLOSSARY OF MEASUREMENT UNITS
Type of measurement Unit of measurement Description
Volumetric ow rate Stm³/h Standard cubic metres per hour
Scfh Standard cubic feet per hour
Pressure
bar Unit of measurement in the CGS system
psi Pounds per square inch
“wc Water column inch
Pa Pascal
Temperature
°C Degree centigrade
°F Fahrenheit degree
KKelvin
Tightening torque Nm Newton-metre
ft-lbs Foot per pound
Sound pressure dB Decibel
Other measures
VVolt
W Watt
ΩOhm
Tab. 2.7.

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2.10 - QUALIFIED PROFESSIONAL FIGURES
Qualied operators in charge of using and managing the equipment throughout its technical service life:
Professional gure Denition
Installer
Qualied operator able to:
• handle materials and equipment.
• carry out all the operations necessary to properly install the equipment;
• perform all the operations necessary to safely operate the equipment and system;
• be able to perform all the operations necessary to uninstall and subsequently dispose of
the equipment in compliance with the regulations in force in the country of installation.
The installer is not authorised to use the lifting equipment.
The equipment must be lifted and handled strictly in accordance with the instructions pro-
vided by the manufacturer and the regulations in force at the place where the equipment is
installed.
Technical
commissioning
Technician trained and authorised to use and manage the equipment for the activities it was
supplied for. They must:
• be able to perform all operations required to properly run the equipment and the sys-
tem, ensuring their own safety and that of any personnel on site;
• access all device parts for visual inspection, equipment checks, adjustments and cali-
brations.
• have proven experience in properly using the equipment similar to that described in this
instruction manual, and be trained, informed and instructed in this regard.
The skilled technician is not authorised to use the lifting equipment.
Tab. 2.8.

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3 - SAFETY
3.1 - GENERAL SAFETY WARNINGS
WARNING!
The equipment described in this instruction manual is:
• a device subjected to pressure in pressurised systems;
• normally installed in systems carrying ammable gases (for example: natural gas).
WARNING!
If the gas used is a combustible gas, the installation area of the equipment is dened as a “danger zone”
as there are residual risks that potentially explosive atmospheres may be generated.
In “danger zones” and in close proximity thereto:
• there must not be any effective sources of ignition;
• smoking is not allowed.
ATTENTION!
Authorised operators must not carry out operations or services on their own initiative that do not fall with-
in their competence.
Never operate the equipment:
• while under the inuence of intoxicating substances such as alcohol;
• if you are using drugs that may slow reaction times.
NOTICE!
The employer must train and inform operators on how to behave during operations and on the equipment
to be used.
Before installation, commissioning or maintenance, operators must:
• take note of the safety regulations applicable to the place of installation they are working in;
• obtain the necessary permits to operate when required;
• wear the personal protective equipment required by the procedures described in this instruction manual:
• ensure that the required collective protective equipment and safety information are available in the area they are op-
erating in.

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3.2 - PERSONAL PROTECTIVE EQUIPMENT
Table 3.9 shows the personal protective equipment (PPE) and its description. An obligation is associated with each symbol.
Personal protective equipment means any equipment intended to be worn by the worker in order to protect them against
one or several risks that are likely to threaten their safety or health during work.
For the operators in charge, depending on the type of work requested, the most appropriate PPE of the following will be
reported and must be used:
Symbol Meaning
Obligation to use safety or insulated gloves.
Indicates a requirement for the personnel to use safety or insulated gloves.
Obligation to use safety goggles.
Indicates a requirement for personnel to use protective goggles for eye protection.
Obligation to use safety shoes.
Indicates a requirement for the personnel to use accident-prevention safety shoes.
Obligation to use noise protection equipment.
Indicates a requirement for the personnel to use ear muffs or ear plugs to protect their hearing.
Obligation to wear protective clothing.
Indicates a requirement for the personnel to wear specic protective clothing.
Obligation to use a protective mask.
Indicates a requirement for the personnel to use respiratory masks in the event of a chemical
risk.
Obligation to use a protective helmet.
Indicates a requirement for the personnel to use protective helmets.
Obligation to wear high visibility vests.
Indicates a requirement for the personnel to use high visibility vests.
Tab. 3.9.
WARNING!
Each licensed operator is obliged to:
• take care of his/her own health and safety and that of other people in the workplace who are affected
by his/her actions or omissions, in accordance with the training, instructions and equipment provided
by the employer;
• appropriately use the PPE made available;
• immediately report to the employer, the manager or the person in charge any deciencies in the equip-
ment and devices, as well as any dangerous conditions they may become aware of.

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3.3 - RESIDUAL RISKS
NOTICE!
The equipment of SERIE FEX does not fall within the scope of the PED 2014/68/EU directive.
The risks associated with the equipment are assessed below and the principles adopted for their prevention are indicated,
according to the following classication:
a) Elimination and/or reduction of the risk.
b) Application of appropriate protective measures.
c) information to users about residual risks.

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3.3.1 - TABLE SHOWING RESIDUAL RISKS DUE TO PRESSURE
WARNING!
If there are any functional faults, do not operate. Immediately contact PIETRO FIORENTINI S.p.A. for the
necessary directions.
Risk and Hazard Event and Cause Effect and
Consequence Solution and Prevention
Pressurised gas
leakage.
Projection of me-
tallic and non-me-
tallic pressurised
parts.
• Violent impact.
• Impact (also due
to falling, improper
handling, etc.).
• Deformation.
• Broken connections
and, if pressurised,
even burst.
a. Handling and installation with appropri-
ate devices to avoid localised stress.
b. Installation in suitable places and spac-
es with appropriate guards and packaging.
c. Information/directions contained in this
manual.
Pressurised gas
leakage.
Projection of
metallic and
non-metallic
pressurised parts.
• Use of inappropriate
uids.
• Corrosion.
• Embrittlement.
• Explosion.
a. The user must check compliance of the
used uid with what is indicated on the in-
stallation sheet.
Pressurised gas
leakage.
Projection of
metallic and
non-metallic
pressurised parts.
• Operation at tem-
peratures below the
minimum permissi-
ble temperature.
• Embrittlement.
• Breakage.
• Explosion.
a. Install in places where the temperature is
not below the minimum permissible value
and/or insulate the equipment adequately.
b. The minimum allowable temperature is
specied in this manual (refer to paragraph
4.5).
Pressurised gas
leakage.
Projection of me-
tallic and non-me-
tallic pressurised
parts.
Explosion.
• Overpressure or
exceedance of the
rated limit values
(maximum pressure
allowed).
• Explosion.
• Breaks.
• Cracks.
• Permanent defor-
mations.
a. The device has appropriate design safe-
ty margins.
b. The user must check the maximum
pressure applicable to the equipment.
c. The design pressure is specied in this
manual (refer to paragraph 4.5).
Pressurised uid
leakage.
Projection of
metallic and
non-metallic
pressurised parts.
• Incorrect xing of
the equipment.
• Deformation.
• Breakage.
a.The device is equipped with unied type
process connections and compression t-
tings.
b. The installer must ensure correct xing
to the line.
c. Information/directions contained in this
manual.
Explosion of the
device,
pressurised uid
leakage.
Projection of
metallic parts.
• Operation at tem-
peratures above the
maximum permissi-
ble temperature.
• Reduction of me-
chanical resistance,
breakage of the
device.
• Explosion.
a. The commissioning technician must
equip the system with suitable control and
safety devices.
b. The maximum allowable temperature is
specied in this manual (refer to paragraph
4.5).
Pressurised gas
leakage.
Projection of
metallic and
non-metallic
pressurised parts.
• Electrostatic poten-
tial differential stray
currents.
• Corrosion localised
in the device.
a. The commissioning technician must
check the equipment for proper earthing.