TLV A-COS-10, Инструкция по эксплуатации

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172-65254MA-04 (A-COS-10) 22 Apr 2020
20
Problem Symptom Cause Remedy
The secondary
pressure cannot
be adjusted or
increases
abnormally
(continued) Adjustment is
difficult, and set
pressure varies There is a build-up of dirt
on the sliding surfaces of
the pilot, piston or main
valve Clean
The adjustment screw
has seized Replace with a new
adjustment screw
The small hole on the
piston is clogged Clean
The diaphragm is
distorted or damaged Replace with a new
diaphragm
There is fluctuation in air
consumption Check the flow rate,
replace the product if
necessary
The selected model is
inappropriate for the
service conditions
(specifications) Check the model
selection, replace the
product if necessary
Upon closing the
valves on the
secondary side, the
secondary
pressure abruptly
rises as high as the
primary pressure The bypass valve is
leaking Check, clean, and replace
with a new valve if
necessary
There is a build-up of dirt
on or damage to the pilot
valve seat or main valve
seat Clean
Align
Replace if necessary
Hunting or
chattering occurs Occurs at low air
demand It is being operated below
the lower flow rate limit Check the volume of air
supply, replace with a
smaller diameter valve
Hunting never
stops There is too high a
reduction ratio (operated
at below 10% of the
primary pressure) Change to an acceptable
operating range
The selected model is
inappropriate for the
service conditions
(specifications) Check the model
selection, replace the
product if necessary
Chattering never
stops Condensate is contained,
or the trap is blocked Check the trap
Check the piping
The selected model is
inappropriate for the
service conditions
(specifications) Check the model
selection, replace the
product if necessary
Abnormal noises Makes a high-
pitched noise There is too high a
reduction ratio Use two-stage reduction
Check the flow rate and
use a larger size valve
Install the valve as far
away as possible
The flow is too great
There is a high-speed
open/close valve nearby
Faulty air trap Air is blowing There is a build-up of dirt
on the trap valve seat or
at the float base Clean
The body is installed tilted Check the piping
The float is deformed Check for water hammer
Replace with a new float
Continued on the next page