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 0.1 mm³/s, it is
recommended to tighten the packing glands of HEROSE valves after 50 cycles following installation to the
torque corresponding to the table using a torque wrench.
Torque
Valve
nominal size
DN10
DN15
DN20
DN25
DN32
DN40
DN50
DN65
DN80
DN100
DN150
DN200
RG ≙ gunmetal
SS ≙ stainless steel
34
Torque
RG
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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