Publicité
Installation Procedure
Before installing the regulator it is important to
(A) clean the upstream pipe; it is recommended to ins-
tall a cartridge filter upstream of the apparatus.
(B) check that the regulator has not been visibly dama-
ged during transport.
When installing the regulator
(C) chek that the flow of the gas corresponds to the
arrow moulded on the body of the regulator.
(D) to obtain proper operation of the regulator, it is es-
sential for its impulse intake to be connected on
the downstream pipe; the pressure intake, according
to the installation scheme, must be connected to a
straight piece of the downstream pipe.
For this purpose it is recommended:
1) to weld the pressure intake onto the upper part of
the downstream pipe to avoid impurities;
2) to avoid any points on the impulse line where impu-
rities could collect
Caution: in addition, the regulator must be installed ac-
cording to good engineering practice. The installation
must also comply with national and/or international re-
gulations and standards.
8
Start-up Instruction
Caution: before start-up, the installation must be che-
cked for leaks.
After installing the regulator, check that:
(1) the stop valves (1), downstream (11) and the bleed
cock (9) are closed;
(2) the gas pressure is not higher than the allowable li-
mits;
(3) if the apparatus is fitted with a shut-off valve, the shut-
off valve must be closed;
After verifying the above mentioned points, pro-
ceed as follows:
(A) open the upstream stop valves (1) slowly and just
enough to ensure a very small flow of gas; check the
upstream pressure gauge (3);
(B) reset the shut-off valve (see section"Resetting the
shut-off valve");
(C) check that the downstream pressure is rising slowly
on the manometer (10): the downstream pressure
should stop at the required pressure value or at a va-
lue a little higher;
(D) when the upstream pressure is also stabilised, slowly
open the upstream stop valve (1) to a full open posi-
tion;
(E) then slowly open the downstream stop valve (11). At
this point the regulator is in operation.
Likewise, the process can be followed for the installation
of a monitor regulator (4) in line with the working regu-
lator (6) (see installation scheme below), keeping in mind
that the manometer (5) installed between the regulators
must indicate the same, or little higher, pressure value as
the upstream manometer (10).
Publicité
