2.4 Unauthorized alterations and spare parts
Modification or alteration of the low pressure regulator types
320/520 is not permitted. Original drawings and accessories
authorised by the manufacturer serve for safety. The use of
other parts or unauthorised modifications to the low pressure
regulator types 320/520 by third parties invalidates the
manufacturer's liability for the consequences.
2.5 Permissible operating mode
•
liquid gas (gas phase), others on request
•
ex zone 1 or 2
•
in weather-protected outdoor areas,
•
in buildings and special installation rooms (according
to TRF 2012)
2.6 Inadmissible operating mode
•
ex-zone 0
•
operating modes that deviate from the permissible
operating modes and technical data
3. Handling
3.1 Transport
During all transportation, the generally recognised rules of
technology and the accident prevention regulations must be
strictly observed.
Handle the goods to be transported with care. During
transport, the pressure regulator must be protected against
shocks, blows or vibration.
Immediately after receipt of the goods, the delivery must be
checked for completeness and transport damage. See also
section 9.0.
3.2 Storage
If the pressure regulator is not installed immediately upon
delivery, it must be stored properly.
Storage temperature -20°C to +60°C, dry, free of dirt and
protected from moisture.
3.3 Handling prior assembly
•
Protect from weather influences such as wetness.
•
Make sure that the product is free from dust and
foreign particles.
4. Product specification
4.1 Safety shut-off valve (OPSO)
The overpressure safety shut-off device OPSO is open during
normal operation and is designed to shut off the gas flow
automatically as soon as the set response pressure is
reached in order to protect downstream equipment from
impermissibly high pressure. It must be opened manually
after closing (see OPSO restart).
4.2 Pressure regulator 2
nd
stage
The pressure regulator of the 2nd stage reduces the
controlled pressure from the pressure regulator of the 1st
stage to a set output pressure.
4.3 Pressure Relief Valve (PRV)
The PRV (Pressure Relief Valve) is closed during normal
operation and is designed to automatically release the gas
flow with limited flow when the pressure in the system to be
protected reaches the set pressure. This is relieved via the
regulator's venting port. It closes again automatically when
the pressure drops below the set pressure.
The outlet opening must be protected against rainwater.
It is important to note that pressure regulators which
are operated inside a building, an enclosure or a
hazardous area must be provided with a vent line to
the outside.
Please observe this information, otherwise liquid gas
can escape in the building, which may lead to an
explosion.
Insect screen with filter screen must be screwed into
the vent on the regulator. It must be checked
regularly whether the screen is free from dirt. A
clogged screen can lead to increased or too low
outlet pressures and thus to a response of the
OPSO.
4.4 Safety diaphragm (AD)
The task of the safety diaphragms at the control stages is to
limit the leakage rate in case of fracture of the respective
working diaphragm. In this case, the safety diaphragm only
allows metered quantities of gas (less than 30 l/h, related to
air, at maximum inlet pressure) to escape through the exhaust
port into the installation room.
5. Connectors
5.1 Input connectors
•
Cylindrical female threads:
G.37 = G 1/2”
•
Cutting ring fitting RVS:
G.22 = 12mm, 15mm, 18mm, 22mm, 28mm
•
Compression fitting PVS
G16
•
Soldering fitting LVS
G16
Other connections on request!
5.2 Output connectors
•
Cylindrical female threads:
H.22 = G 1/2”
•
Cutting ring fitting RVS:
H.8 = 12mm, 15mm, 18mm, 22mm, 28mm
•
Compression fitting PVS:
H.10
•
Soldering fitting LVS:
H.10
6. Assembly
6.1 Information on hazards during installation, operation
and maintenance
DANGER!
Safe operation of the pressure regulator is only
guaranteed if it is installed and commissioned by
qualified personnel (see point 2.3 "Qualified
personnel") in accordance with the warnings in this
operating manual. Proper use of tools and protective
equipment must be ensured. The operating
instructions of the pressure regulator must be
observed during all work on the pressure regulator or
when handling the pressure regulator.
