3
Note 1: See “Characteristics”
Note 2: Year of manufacture
Note 3: Class 1: -10/+60 °C
Class 2: -20/+60 °C
Note 4: PN 16 PS = 16 bar
ANSI 150 PS = 19.3 bar
Note 5: 1.5 bar M…N-BP/80-100
4 bar all other types
OVERPRESSURE PROTECTION
The recommended maximum allowable pressures are
stamped on the regulator nameplate. If actual version hasn’t
a built-in safety shut-off device, some type of overpressure
protection is needed if the actual outlet pressure exceeds
the actual maximum operating outlet pressure rating.
Overpressure protection should also be provided if the
regulator inlet pressure is greater than the maximum
operating inlet pressure. Downstream side pressure after
possible built-in SSD’s intervention shall stay within the
actual maximum operating set-up range to avoid anomalous
back pressures that can damage the SSD’s slam-shut
controller. Downstream overpressure protection shall be
also provided if the SSD outlet pressure can be greater than
the PS of the SSD slam-shut controller (differential strength
type). Regulator operation below the maximum pressure
limitations does not preclude the possibility of damage from
external sources or debris in the line. The regulator should
be inspected for damage after any overpressure condition.
TRANSPORT AND HANDLING
Established transport and handling procedures shall be
followed to avoid any damage on the pressure containing
parts by shocks or anomalous stresses. Eyebolts are
designed just for handling of equipment weight. Built-up
sensing lines and pressure accessories (e.g. slam-shut
controller) shall to be protected by shocks or anomalous
stresses.
ATEX REQUIREMENTS
If the provisions of EN 12186 & EN 12279, national
regulations, if any, and specic manufacturer
recommendations are not put into practice before
installation and if purge by inert gas is not carried out before
equipment’s start-up and shut-down operations, a potential
external and internal explosive atmosphere can be present
in equipment & gas pressure regulating/measuring stations/
installations.
If a presence of foreign material in the pipelines is foreseen
and purge by inert gas is not carried out, the following
procedure is recommended to avoid any possible external
ignition source inside the equipment due to mechanical
generated sparks :
• drainage to safe area via drain lines of foreign materials, if
any, by inow of fuel gas with low velocity in the pipe-work
( 5m/sec)
In any case,
• provisions of Directive 1999/92/EC and 89/655/EC shall
be enforced by gas pressure regulating/measuring station/
installation’s end user
• with a view to preventing and providing protection against
explosions, technical and/or organizational measures
appropriate to the nature of the operation shall be taken
(e.g. : lling/exhausting of fuel gas of internal volume
of the isolated part/entire installation with vent lines
to safe area - 7.5.2 of EN 12186 & 7.4 of EN 12279 ;
monitoring of settings with further exhaust of fuel gas to
safe area ; connection of isolated part/entire installation to
downstream pipeline; ….)
• provision in 9.3 of EN 12186 & 12279 shall be enforced by
pressure regulating/measuring station/installation’s end user
• external tightness test shall be carried out after each
reassembly at installation site using testing pressure in
accordance with national rules
periodical check/maintenance for surveillance shall be
carried out complying with national regulations, if any, and
specic manufacturer recommendations.
SLAM-SHUT CONTROLLER
The following controllers are used with M series regulator
with built-in slam-shut:
• OS/66 Series spring loaded controllers
Figure 3. OS/66 Slam-Shut Controller
Table 2. OS/66 Characteristics
MODEL
BODY
RESISTANCE
OVERPRESSURE
SET RANGE
W
do
UNDERPRESSURE
SET RANGE
W
du
Min. Min.
OS/66 6 0.022 0.6 0.007 0.45
OS/66-AP 6 0.2 5 0.1 2.5
Threaded 1/4” NPT female impulse connections.
Materials
Body and Cover: Aluminium
Diaphragm: NBR rubber
For further informations please
see the Instruction Manual
0048EN-OS66-IM.
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