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Dival SQD-1 - MT 234-E - 02-2020
EN
PRECAUTION
GENERAL PRECAUTION
The apparatus described in this manual is a device subject to pressure installed in systems under pressure;
The apparatus in question is normally installed in systems for transporting flammable gases (natural gas, for exaple).
PRECAUTION FOR THE OPERATORS
Before proceeding with installation, commissioning or maintenance, operators must:
•
Examine the safety provisions applicable to the installation in which they must work;
•
Obtain the authorisations necessary for working when required;
•
Use the necessary means of individual protection (helmet, goggles, etc.);
•
Ensure that the area in which they operate is fitted with the means of collective protection envisaged and
with the necessary safety indications.
PACKING
The packing for transportation of equipment and of relevant spare parts are designed and shaped to avoid damage to
any part during transportation, warehousing and handling activities. Therefore the equipment and spare parts shall be
kept into their packing until their installation in the final site. After packing is open, check that no damage occurred to
any goods. If damage occurred inform the supplier and keep packing for any verification.
HANDLING
The handling of the apparatus and of its components must only be carried out after ensuring that the lifting gear is
adequate for the loads to lift (lifting capacity and functionality). The apparatus must be handled using the lifting points
provided on the apparatus itself.
Motorised means must only be used by the persons in charge of them.
INSTALLATION
The installation of the pressure regulator has to occur in compliance with the provisions (laws or standards) in force in
the place of installation.
In detail, natural gas plants have to show features in compliance with the law provisions and standard requirements in
force in the place of installation or at lease in compliance with standards EN 12186 or EN 12279; in detail, it is neces
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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 with such standards minimizes the risk of fire hazard and the formation
of potentially explosive atmospheres.
The valve is not equipped with external pressure limitation devices; therefore, it has to be installed making sure that
the operating pressure of the assembly on which it is installed does not exceed the maximum allowable pressure
(PS).
Therefore, the user, as deemed necessary by the same, shall install on the assembly suitable pressure limitation sy
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stems, as well as provide the plant with suitable relief or drain systems in order to discharge the pressure and fluid
contained in the plant before proceeding with any inspection and maintenance activity.
If the installation of the apparatus requires the application of compression fittings in the field, these must be installed
following the instructions of the manufacturer of the fittings themselves. The choice of the fitting must be compatible
with the use specified for the apparatus and with the specifications of the system when envisaged..
START UP
Commissioning must be carried out by adequately trained personnel.
During the commissioning activities, the personnel not strictly necessary must be ordered away and the no-go area
must be properly signalled (signs, barriers, etc.).
Check that the settings of the apparatus are those requested; if necessary, reset them to the required values in accor
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dance with the procedures indicated in the manual.
When commissioning, the risks associated with any discharges into the atmosphere of flammable or noxious gases
must be assessed.
In installations in natural gas distribution networks, the risk of the formation of explosive mixtures (gas/air) inside the
piping must be considered.
COMPLIANCE WITH DIRECTIVE 2014/68/EU (PED)
The SQD-1 regulators are classified as Fail Open regulators and as Integral Strength (IS) according to EN 334 and are
therefore definied as safety accessories according to Directive 2014/68/EU (PED).
