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Installation Procedure
(A) Remove protective covers from inlet and outlet
of regulator Both regulator and tubing must be
clean in order to avoid damage
(B) Install the regulator on to the pipe, making sure
that arrow on the body fits with the direction of
flow
(C) Connect control lines of regulator and shut-off
valve to a turbulence- free zone on to the down-
stream pipe A manometer should also be con-
nected downstream the regulator It may be
necessary to install larger diameter pipe on the
downstream side to limit the flow velocity
(D) Check all connections between regulator, safety
shut-off valve and pipe for tightness If soap so-
lutions are used for checking, dry regulator thor-
oughly
(E) For setting the downstream pressure turn clock-
wise or anticlockwise direction the screw on the
top of the pilot
Caution: in addition, the regulator must be installed
according to good engineering practice. The installa-
tion must also comply with national and/or interna-
tional standards.
Start- up Instructions
Caution: before start-up, the installation must be
checked for leaks.
To start-up the regulator properly, proceed as follows
according to the installation scheme shown
below:
(1) check that the upstream and downstream valves
and the bleed cock are closed;
(2) if the apparatus is fitted with the shut-off valve,
the shut-off valve must be closed; After verifying
the above mentioned points, proceed as folows:
Installation Scheme
(A) open the upstream stop valve (1) slowly and
just enough to ensure a very small flow of gas;
check the upstream pressure gauge (2);
(B) reset the shut-off valve (see section „Resetting
of the shut-off valve");
(C) check that the downstream pressure is rising
slowly on the downstream manometer (7 or
10) : the downstream pressure should stop at
the set pressure value or on a value a little
higher;
(D) when the upstream pressure is also stabilised,
slowly open the upstream stop valve (1) to a
full open position;
(E) then slowly open the downstream 1 1 valve (8
or 1 1) or;
At this point the regulator is in operation Like-
wise the process can be followed for the instal-
lation of a monitor regulator in line with the
regulator (see installation scheme), keeping in
mind that the manometer (7) installed be-
tween the regulators has to indicate the same,
or little higher, pressure value as the upstream
manometer
Maintenance
Maintenance is extremely dependant on the qual-
ity of the gas used (humidity, impurities, gasoline)
and the efficiency of the filter used upstream of the
regulator: it is recommended to install upstream of
the regulator a filter, which traps solid and liquid
particles present in the fluid that would otherwise
impair the proper functioning of the apparatusDe-
pending on the gas moisture content, contamina-
tion and chemical composition, occasional clean-
ing may be required
Caution: before any service operation, be sure that
upstream stop valve is closed and the gas installa-
tion is de-pressurised.
Item
Description
Upstream Stop valve
1
Manometer
2
Pilot Regulator Monitor
3
(Shut-off Valve: Pilot Regulator)
Monitor Regulator
4
(Shut-off Valve: Regulator)
5
Shut-off Device
Manometer
7
Pilot Regulator (Shut-off Valve:
8
Downstream Stop valve)
9
Regulator
Manometer
10
Downstream Stop valve
1 1
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