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Disassembly/Reassembly (to reassemble, follow procedures in reverse)
Part & No.
Use a wrench to remove
Body 1 /
Cover 2
Remove gasket only if worn or
Cover Gasket 8
damaged
(LA13, LA13L)
Use appropriate pliers to remove
Spring Clip 7
Use pliers to grip ball at the tip of
X-element 3
the X-element
Valve Seat 4
Use a wrench to remove
(LA13L)
Be careful not to bend
X-element Guide 9
(LA13L)
Screen 5
Be careful not to bend
Installation of X-element
9. Troubleshooting
If the expected performance is unachievable after installation of the air vent, read chapter 5 and
chapter 6 again and check the following points to take appropriate corrective measures.
Problem
No air is
The X-element is stuck to the valve seat
discharged
The valve seat is blocked
(blocked) or
discharge is
The screen is clogged
poor
The air vent operating pressure exceeds
the maximum specified pressure, or
there is insufficient pressure differential
between the air vent inlet and outlet
Steam is
There is rust or scale between the
discharged or
X-element valve and valve seat
leaks from
The X-element valve and valve seat
the outlet
are damaged
(blowing)
The X-element is broken
(steam leakage)
Improper installation
Air vent vibration
Steam is leaking
Gasket deterioration or damage
from a place other
Improper tightening torques were
than the outlet
used
Disassembly
Figure A
Spring clip
Slot
Slot
Cause
̶ 11 ̶
Reassembly
Clean seating surfaces between cover
and body, coat threads (only LA21) with
anti-seize, tighten to the proper torque
Replace with a new gasket only if worn
or damaged
Insert securely into the 3 slots on the X-
element guide or cover (figure A)
Insert right side up making sure not to
catch the guide or cover (figure B)
Tighten to the proper torque
Fix with Valve Seat and make sure X-
element can be inserted smoothly
Insert carefully without bending
Figure B
X-element
Cover
X-element guide
Remedy
Clean parts
Clean the valve seat, or replace with
a new valve seat (LA13L) or cover
Clean parts
Compare specifications and actual
operating conditions
Clean parts
Replace with a new X-element and/or
cover (LA13L: also the valve seat)
Replace with a new X-element
Correct the installation
Lengthen the inlet piping and fasten it securely
Replace with a new gasket
Tighten to the proper torque
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