Installation Manual, Maintenance and Operation
Pressure Regulating Valve – Model Horus
MI-18
Elaborate
Verified / Approved
CSQ
Date
Review
Page
J.Junior
Celso Nieto
JM
25/11/16 04
10 de 32
3.3 PILOTS (G-40 & G-42)
The pilots series G-40 and G-42 are composed by dual diaphragm pilot that can achieve much higher accuracy than
other pilots due to their constructional characteristics.
Pilots are responsible for sending the exact loading pressure for pressure regulating valves open or close under normal
process conditions by the balance between the force of the regulating spring and the outlet pressure received by the
sensor outlet.
The green line represents the pressure from the booster or pre regulator, the yellow line is the regulator outlet
pressure (sensor outlet) and this is responsible for moving the diaphragm assembly (A) upward or downward, causing the
driver shutter (B) move it away from the seat (C), thus permitting the reduction in inlet pressure and sending the
appropriate gas pressure to perform charging of the main valve causing the valve to open or close according to the
process conditions.
A
B
C
