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
11 de 45
A filter is assembled upstream the pre-regulator and pilot to protect them against gas / installation impurities.
When there is gas flow, the pilot compares the outlet pressure with the adjusted pressure in the pilot spring. If the
pressure under the pilot diaphragm is lower than the desirable pressure the pilot will open and feed the upper chamber
actuator of main valve.
If the gas flow decrease or it is interrupted, then the outlet pressure begins increasing and it is compared with the
adjusted pressure in the pilot spring. If the outlet pressure is greater than the pilot set pressure, the pilot will close and the
pressure in the upper and lower chamber of the main valve will be the same; so the main valve will be closed by the force
of the closer spring.
A bleed valve assembled downstream of loading pressure will provide a variation in the gas passage orifice, increasing
or decreasing the regulator response. It also provides an opposite velocity in the closing procedure of main valve. The
equilibrium will be according to the each process.