Dungs FRSBV 5010 ND Manual do utilizador - Página 17
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10.2 Tools required
• The threshold level is adjusted and the spring replaced for all five pressure relief valve types in the same way.
They differ only in the spanner used for the adjusting nuts' thread.
• A pipe socket spanner is needed for every FRSBV type:
FRSBV type
FRSBV 10005 ND
FRSBV 10005 HD
FRSBV 5010 ND
FRSBV 10010 HD
FRSBV 20010 HD
11. Flow tables
° V
=
gas used
f =
17 ... 20
Item number
289261
289262
289263
289264
289265
°
V
x f
air
Air density
spec. weight of the gas used
Width across the pipe
socket spanner flats
SW 27
SW 27
SW 14
SW 30
SW 30
Type of gas
Natural gas
City gas
LPG
Air
Spec.
weight
dv
f
[kg/m
]
3
0.81
0.65
1.24
0,58
0,47
1,46
2.08
1.67
0.77
1.24
1.00
1.00