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Bolt
Measurement
chamber cover
O-ring (or gasket)
Seal diaphragm
Seal tape
(6) After assembly, carry out a pressure test. Apply a pressure equal to 150% of the maximum
working pressure to both
fl
ange side, high pressure side (HP) and low pressure (L) mea-
surement chamber of the transmitter simultaneously for 15 minutes, and make sure there is
no leakage.
(1) Remove four hexagon socket head bolts with a torque wrench, etc..
(2) Disassembly gives access to the casing cover, O-ring (or gasket) and hexagon socket head
bolts.
(3) After disassembly, replace the faulty part with a new one.
(4) Before reassembly, clean the O-ring face of casing cover with the soft cloth immersed in
water, alcohol, or similar.
(5) Reassemble the detecting unit by reversing the disassembling procedure. The casing
cover should be assembled carefully so as not to damage the seal diaphragm. Tightening
torque should follow the table below.
In case of level transmitter (FKE)
Bolt size
Bolt material
Tightening torque
Maximum working pressure
M10
Cr-Mo steel
50 N.m
Up to rated
fl
ange pressure
M10
SS 316
30 N.m
Up to rated
fl
ange pressure
M10
SS 630
50 N.m
Up to rated
fl
ange pressure
To avoid any damage of the measuring cell, do not exceed the test pressure
of different cells (please refer to the technical datasheets of the concerned
transmitter)
ATTENTION