Installation and Operation Manual
Brise Plus - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
GN
JM
10/09/18
06
21 de 45
1) Close slowly the on-off manual valve upstream of regulator.
2) Close slowly the on-off manual valve downstream of regulator.
3) Certify that the springs of pre pilot and pilot are totally released.
4) Certify that bleed (discharge valve / needle valve) is open in 1/8 of turn.
5) Open the purge valve installed downstream of regulator 1/8 of turn.
6) Open slowly the on-off manual valve upstream of regulator verifying the gas pressure.
5.1 – PRESSURE REGULATOR ADJUSTMENT
1) First of all it’s important to check if the incorporated SSV is armed, it’s possible to check it pulling the stem of
SSV, you will hear a characteristic noise.
To pull the stem remember to use the cover of SSV.
Don’t forget to equalize the pressure at the SSV by the by-pass valve before try to rearm the stem.
2) Adjust the set pressure of pre pilot G-38 in 0.5 bar plus the desired outlet pressure, for example if you want to
adjust the valve in 0.5 bar, you must adjust your pre pilot in 1.0 bar. You can verify the pre pilot adjusted
pressure in the pressure indicator connected to the pre pilot.
When you are operating with a booster G-43 it’s not necessary to adjust anything, the booster will adjust
automatically the feeding pressure to pilot.
3) Adjust the outlet pressure of the pressure regulator turning the regulating screw located in the top side of the
pilot G-50 or G-31, very slowly, in the clockwise direction.
4) You must follow the pressure increase by the pressure indicator located downstream of pressure regulator.
5) Check the pressure and if necessary adjust the discharge valve aperture.
6) Close the purge valve and check the pressure regulator lock up.
7) Verify if the regulator is totally tight (without gas leak) checking the gauge manometer in the outlet pipe. After
lock up the pressure should keep without any variation.
8) Open slowly the on-off manual valve downstream the regulator.
5.2 – RECOMMENDED TOOLS FOR START-UP
Combination spanner size: 3/8” and 19 mm
Adjustable spanner 1”
