SMC Networks AWM20-01 Series Operation Manual page 28

Refer to sections [11. How to Replace the Components] (P28-37) and [12. Disassembly Drawing] (P38-39).
Trouble
Category Failure
Air leakage
from the
bonnet
exhaust port.
Air leakage
from between
the bonnet and
the body.
Air leakage
from between
the body and
the bowl.
Air leakage
from the bowl.
Air leakage
from the drain
cock.
Drain or air
continues
blowing out
from the drain
discharge of
the float type
auto drain.
Drain is not
discharging
when the drain
cock opens.
Too much
drain comes
from the piping
on outlet side.
Note) Fluorine grease is recommended when applying additional grease.
Possible cause
6. Back pressure exceeding the set
pressure is applied to the downstream.
1. Loosened bonnet screws.
2. Diaphragm is damaged.
1. Bowl seal is damaged.
1. Bowl is damaged.
1. Foreign matter caught in the valve of the
drain cock.
2. Seating part of the drain cock is
damaged.
1. Low supply pressure
2. The product is not mounted correctly.
3. Foreign matter is caught in the main
valve of the auto drain.
4. Main valve of the auto drain is broken.
5. Drain piping is long, or I.D. of the piping
is small. (Back pressure is applied.)
6. Drain discharging part and bowl seat are
damaged.
1. Blockage of outlet of the drain cock due
to solid foreign matter etc.
1. Drain level reaches the element
assembly .
Countermeasure
Revise the air circuit so that back pressure
does not exceed the set pressure.
Fasten the bonnet.
Replace the diaphragm assembly.
Replace the bowl seal.
Grease up before replacing the bowl seal.
Note)
Replace the bowl assembly.
(If the solvent is considered to be harmful,
replacement to the metal bowl is
recommended.)
Open the drain cock for a few seconds for
blowing.
Replace the bowl assembly.
Confirm the minimum operating pressure of
the auto drain.
Install the drain exhaust so that it will face
vertically downward.
Eliminate the dirt by manual discharge.
Replace the bowl assembly.
Be sure to connect the appropriate piping
for drain.
Replace the bowl assembly.
Replace the bowl assembly.
Open the drain cock for discharging and
replace the element assembly.
-27-
Page for
reference
-
P28
P28
P29-30
P29-30
P24-25
P29-30
P5
P14-21
P6
P24-25
P29-30
P7
P29-30
P29-30
P24-25
P31-32