Installation and Operation Manual
Urano - Pressure Regulating Valve
MI-31
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JJ
JJ
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05/07/21
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6.7 PROCEDURE FOR THE PILOT G-40/42 ASSEMBLY
To perform the assembly of the G-42 pilot, just follow the steps of the disassembly procedure in inverse
order starting with the seat assembly, but we shall make two observations on two specific points that must
be examined closely during the pilot reassembly.
1) Pay attention to the seat (pos 46/48) and the movable base (pos 44/46) assembly, the seat hole shall
always be installed in the position opposite to the threaded pin of the movable base, as illustrated below,
otherwise the seat will not match the shutter (pos 29/26).
2) After mounting the seat (pos 46/48 ) in the movable base (item 44/46 ) it is necessary to leave the seat
perfectly aligned with the movable base hole in order to avoid that it comes into contact with the walls of
the movable base during operation. The proper procedure for performing this alignment is:
2.1) After mounting the seat (pos 46/48) on the body (pos 49/51) mount the lower and top diaphragm
assembly and lock with the nut (pos 35/32) and diaphragm the support (pos 36/35).
2.2) With the assembled unit, turn the movable base (pos 44/46) clockwise until it touches the seat (pos
46/48). With a pen make a mark on the diaphragm and the body, then turn the movable base again, in
the counterclockwise direction until it touches the seat (pos 46/48), make a mark on the body following
Seat
Top of the
movable base