8-2 EB 8048-2 EN
Malfunctions
Malfunction Possible reasons Recommended action
The valve leaks to the
atmosphere (fugitive
emissions).
Diaphragm not
correctly clamped into
position.
Check that the diaphragm is correctly seated. If
necessary, replace diaphragm (see the 'Servicing'
section).
Check the tightening torque of the joint between
plug and plug stem.
Check the tightening torque of the joint between
body and bonnet/ange.
Diaphragm damaged. Replace diaphragm (see the 'Servicing' section).
Defective packing Replace packing (see the 'Servicing' section) or
contact our after-sales service.
Version with adjustable
packing
1)
: packing not
tightened correctly
Adjust the packing (see information under
'Adjusting the packing' in the 'Installation' section >
'Testing the installed valve'). Contact our after-sales
service when it continues to leak.
Flanged/threaded/
clamped joint loose or
gasket worn out
Check pipe connection.
Replace gasket (see the 'Servicing' section) or
contact our after-sales service.
1)
See the 'Markings on the device' section
Contact our after-sales service for malfunctions not listed in the table.
Note
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