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Operating instructions
7.3
Maintenance instruction - packing gland nut
In accordance with DIN EN 1626 the leakage rate must be less than 14 mm³/p. (in the case of
combustible fluids less than 10 mm³/p.). To achieve and maintain a lower leakage rate of 0,1mm³/p. After
50 cycles it is recommended to tighten the glands nuts of HEROSE valves with a torque wrench and to
the torque corresponding to the table.
Torque
Valve nominal
size
DN10
DN15
DN20
DN25
DN32
DN40
DN50
DN65
DN80
DN100
DN150
DN200
RG ≙ gunmetal
SS ≙ stainless steel
26
Torque
RG (gunmetal)
SS
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
13 Nm
15 Nm
13 Nm
15 Nm
13 Nm
15 Nm
13 Nm
15 Nm
15 Nm
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