TECHNICAL MANUAL MT103
33
ATTENTION
At the end of the operation, reconnect the control head to the downstream pressure take-off.
N.B.: The intervention tests should be repeated at least every 6 months.
At the end of the slam-shut check, proceed as follows:
1) Check that the slam-shut is in the closed position.
2) Put the three wais valve 12 in start-up position (connecting the upstream pipe with the pilot).
3) Very slowly open the inlet on/off valve V1.
4) Very slowly open the slam-shut by turning the provided lever.
5) Put the three wais valve 12 in working position (connecting the pressure regulator with the pilot).
6) Open the downstream bleed cock 6.
7) Check on the pressure gauge 5 that the pressure does not exceed the maximum value permitted by the setting spring
fitted in the pilot 3. If necessary, suspend the operation by closing V1 and completely reducing the load on the spring
by turning the adjustment screw 10 anticlockwise. Then slowly reopen the valve V1.
8) If necessary, adjust the setting by appropriately turning the adjustment screw 10.
9) Close the vent cock 6 and check that the down-line pressure, after a period of increase, stabilizes and at a lower
value than that of closure of the pilot/regulator combination. Otherwise eliminate the causes of the internal
leakage.
10) Using a foam substance, check the tightness of all the joints between the on-off valves V1 and V2.
11) Very slowly open the downstream on-off valve V2 to obtain the complete filling of the pipe. If at the beginning
of this operation the pressure in the pipe is much lower than the set point, the opening of this valve should be
choked so as not to go beyond the maximum flow rate value for the installation.
12) It is recommended check that the flow of the line stops when the slam-shut is tripped manually.
Tab. 8
Settings of on-line apparatuses consistings
of regulator REFLUX 819/FO + Slam shut + Relief valve
Regulator set-point
Set-point
Set-point
Set-point
(Pas) bar
RELIEF VALVE
SLAM-SHUT Max
SLAM-SHUT Min
1<Pas>2.1
2.1<Pas>5
5<Pas>10
10<Pas>25
25<Pas>43
43<Pas>74
Pas x 1.1
Pas x 1.2
Pas - 0.3 bar
Pas - 0.5 bar
Pas - 3 bar
Pas - 5 bar
Pas x 1.2
Pas x 1.1
Pas x 1.05
Pas x 1.1
Pas x 1.05
Pas x 1.02
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Содержание REFLUX 819/FO
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Страница 11: ...TECHNICAL MANUAL MT103 11 Fig 2A vent 204 A FO PILOT sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...
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Страница 46: ...TECHNICAL MANUAL MT103 46 PRE REGULATOR R14 A FO Fig 28 sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...
Страница 52: ...TECHNICAL MANUAL MT103 52 VERSIONS Fig 29 A sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...
Страница 66: ...66 TECHNICAL MANUAL MT103 10 0 LIST OF RECOMMENDED SPARES sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...
Страница 72: ...72 TECHNICAL MANUAL MT103 PM 819 MONITOR DN 2 sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...
Страница 81: ...TECHNICAL MANUAL MT103 81 HB 97 SLAM SHUT DEVICE DN 4 sales mvandc com Phone 877 566 3837 Fax 925 407 2903 ...