Technical data, operating limits, dimensions and weights
8
Troubleshooting
WARNING
Risk of injury and poisoning due to hazardous or hot
media!
Use personal protective equipment when carrying out any
work on the fitting.
Safely collect the media and dispose of it in accordance
with environmental regulations.
Consult with the manufacturer regarding faults which are not
identified in the following table, or which cannot be traced to
the indicated causes.
Error
Possible cause
Corrective action
Fitting installed the wrong way round.
Check the direction of flow in the fitting
(→ 3.4 Direction of flow, Page 6).
if
necessary install the fitting correctly
(→ 5.3 Installing fitting in pipe, Page 7).
Fitting is not sealing.
Ball/float or the associated O-rings
dirty or worn.
Clean and if necessary replace the ball/float
and associated O-rings
replacing the ball/float and O-rings, Page 8).
Medium is leaking from the
housing.
O-ring on the housing worn.
Replace the O-ring on the housing
(→ 7.2.2 Cleaning/replacing the ball/float
and O-rings, Page 8).
Fitting installed the wrong way round.
Check the direction of flow in the fitting
(→ 3.4 Direction of flow, Page 6).
if
necessary install the fitting correctly
(→ 5.3 Installing fitting in pipe, Page 7).
Vessel is not being aerated
(B895).
The ball/float is stuck in position by
the seal.
Clean and if necessary replace the ball/float
and associated O-rings
replacing the ball/float and O-rings, Page 8).
Ensure that the fitting is suitable for the medium in
question (→ resistance list).
The fitting is stuck in the
„Closed“ position: The vessel is
pressurized.
Drain the medium out of the vessel until the ball/float
is released from the valve seat and the air can
escape.
Vessel is not being vented
(BE891).
The fitting is stuck in the
„Closed“ position: The vessel is
depressurized.
Clean and if necessary replace the ball/float,
valve seat and O-rings
replacing the ball/float and O-rings, Page 8).
Ensure that the fitting is suitable for the medium in
question (→ resistance list).
Tab. 3
Troubleshooting
9
Technical data, operating
limits, dimensions and weights
The particulars are described on the data sheet (→ Data
sheet).
302 464
BA-2022.08.25 EN
B895, BE891
9
