7. Inspection and Maintenance
Operational inspections should be performed at least twice per year, or as called for by trap
operating conditions. Steam trap failure may result in temperature drop in the equipment, poor
product quality or losses due to steam leakage.
CAUTION
• Inspection, disassembly, maintenance and repairs should be done only
by trained maintenance personnel.
• Before attempting to open the trap, close the inlet and outlet isolation
valves and wait until the trap has cooled completely. Failure to do so
may result in burns.
• Be sure to use the proper components and NEVER attempt to modify
the product.
Parts Inspection Procedure
Disassembly / Reassembly
Tightening Torque and Distance Across Flats
Body, Cover
Gaskets
Screen
Ball Bucket
Drain-jet, Blast-off Nozzle
Bimetal Strip
Check inside for dirt, grease, oil film, rust or scale
Check for warping or damage
Check for clogging, corrosion or damage
Check for deformation scratches and blockage of the vent hole
Check for clogging, corrosion or damage
Avoid touching or distorting the bimetal strip. Unscew it only if found
damaged
Part & No.
Part & No.
UFO3-BN
・
UFO3F-BN
N
・
m (lbf
・
ft)
30 (22)
15 (11)
60 (43)
0.3 (0.2)
60 (44)
40 (29)
100 (73)
0.3 (0.2)
13 ( )
13 ( )
22 ( )
+
19 ( )
17 ( )
30 ( )
+
UFO3-CN
Cover Bolt 13
Cover 2
Cover Gasket 8
Bimetal Strip 16
Drain-jet 4
Drain-jet
Gasket 5
Screen
Holder 12
Screen Holder
Gasket 11
Screen 10
UFO Ball
Bucket 3
During Disassembly
Use a wrench to remove
Lift up the cover and clean the
sealing surface being careful not
to scratch its surface
Remove the gasket and clean the
sealing surface
Remove with a screw driver, being
careful not to bend the bimetal strip
Use a wrench to remove
Remove the gasket and clean the
sealing surface
Use a wrench to remove
Remove the gasket and clean the
sealing surface
Remove without bending
Use needle-nose pliers to grasp the
UFO by the pin on the top and lift
up to remove
During Reassembly
Coat threads with anti-seize, tighten to the
proper torque
Make sure there are no pieces of old
gasket left on the sealing surface and
reinstall the cover
Replace with a new gasket, do not
apply anti-seize
Consult the table of tightening torques
and tighten to the proper torque
Coat threads with anti-seize, tighten to
the proper torque
Replace with a new gasket if warped
or damaged
Coat threads with anti-seize and
tighten to the proper torque
Replace with a new gasket, coat
surfaces with anti-seize
Reinsert without bending
Insert being careful not to misshape
the UFO ball bucket
Cover Bolt 13
Drain-jet 4
Screen Holder 12
Screw for Bimetal Strip 19
N
・
m (lbf
・
ft)
mm (in)
mm (in)
1 N
・
m 10 kg
・
cm
〜
〜
― 7 ―
7
8
／
1
2
／
1
2
／
13
16
／
21
32
／
3
4
／
