PIETRO FIORENTINI NORVAL, Installation, Commisioning And Maintenance Instructions

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TECHNICAL MANUAL MT044
53
NB. The diaphragm (pos. 20) varies in diameter and thickness depending on the set-point. Its replacement
should be assessed on the basis of its state of wear.
Table of reinforced gasket hardnesses
The hardness of the reinforced gasket (pos. 4) can be identified
from a white mark for 55 ShA or a green one for 85 ShA.
1” ÷ 3” 1” ÷ 3” TR Only Only 4” - 6” - 8”
2” 1 /
2
-3” 4” TR
ø 375 TR
4 Reinforced gasket 1 1 1 1 1
9 Guide ring 2 2 2 2 2
20 Diaphragm 1 1 1 1 1
28 Gasket 1 1 1 1 1
29 Diaphragm 1 1 1 1 1
30 U-ring 1 1 1 1 1
43 O. Ring 1 1 1 1 1
58 O. Ring 1 1 1 1 1
60 O. Ring 1 1 1 - -
61 O. Ring 2 2 2 - -
62 O. Ring 2 2 2 - -
66 O. Ring 1 1 1 - -
67 O. Ring 1 1 1 - -
70 O. Ring - - 1 - -
72 O. Ring - 1 - 1 -
85 O. Ring - - - 2 2
86 O. Ring - - - 1 1
87 O. Ring - - - 2 2
88 O. Ring - - - 1 1
89 O. Ring - - - 1 1
90 O. Ring - - - 2 1
93 O. Ring - - - 1 2
94 O. Ring - - - 1 1
95 O. Ring - - - 1 1
96 O. Ring 1 1 1 1 1
N. OF PIECES
NORV
A
L
DN
POS. DESCRIPTION
Pa
mbar
80
40
0
5 Pe bar
55 Sh. A
85 Sh. A