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In case of absolute and gauge pressure transmitter (FKA/FKM and FKG/FKB)
In case of absolute pressure transmitter FKA/FKM :
In case of gauge pressure transmitter FKG/FKB :
Bolt size
Bolt material
Tightening torque
Maximum working pressure
M10
Cr-Mo steel
50 N.m
500 bar
M10
SS 316
30 N.m
100 bar
M12
Cr-Mo steel
60 N.m
500 bar
M12
SS 660
60 N.m
500 bar
M16
SS 660
110 N.m
500 bar
Bolt size
Bolt material
Tightening torque
Maximum working pressure
M10
Cr-Mo steel
50 N.m
30 bar
M10
SS 316
30 N.m
30 bar
M10
SS 630
50 N.m
30 bar
In case of FKA
Nut
Seal diaphragm
O ring
(or gasket)
Bolt
Measurement
chamber cover
ATTENTION
To avoid any damage of the measuring cell, do not exceed the test pres-
sure of the different cells (please refer to the technical datasheets of the
concerned transmitter)
(1) Remove four hexagon sockets 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.
(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 (LP) mea-
surement chamber of the transmitter simultaneously for 15 minutes, and make sure there
is no leakage.