Valve size
Thread size of valve
disc
Torque [Nm]
DN125
M20 x 1.5
70
DN150
M20 x 1.5
70
10.10
Carrying out the "Internal assembly" leak test (bubble test)
Hint!
Observe the inspection interval! The metal bellows must be checked
for leaks as part of the annual maintenance using the pressurizing
tool .
Tools required:
•
Pressurizing tool
•
Compressed air supply
•
Shut-off valve Ø 6 mm
•
Pressure regulating valve Ø 6 mm
•
Water bath
Carry out the following steps:
1.
Insert the internal assembly with the T-slot of the valve spindle of the removed
internal assembly into the
pressurizing tool
.
Fig.44:
Hook in the internal assembly
2.
Place the clamping arms of the
pressurizing tools
around the valve cover.
Maintenance
Carrying out the "Internal assembly" leak test (bubble test)
430BAL011547EN_2
48
08.07.2019
