TLV A-DR20-10, Инструкция по эксплуатации

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172-65634MAJ-03 (A-DR20) 6 Oct 2021
16
Problem Symptom Cause Remedy
The
secondary
pressure
cannot be
adjusted or
increases
abnormally Adjustment is
difficult and set
pressure varies The adjustment handle has
seized Replace with a new
adjustment handle
The holes in the spacer are
clogged Clean
The slide bearing is
distorted or damaged Replace with a new spacer
(when replacing the slide
bearing or snap ring, these
parts need to be replaced
as a set with the spacer)
The bellows is distorted or
damaged Replace with a new bellows
The selected model is
inappropriate for the service
conditions (specifications) Check the model selection,
replace with a more suitable
unit if necessary
Upon closing the
valves at 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 main
valve or the valve seat Clean and align
Hunting or
chattering
occurs Occurs at low air
demand The flow rate is too low Check the flow rate; check
the model selection, replace
with a unit that has smaller
nominal diameter or a more
suitable unit if necessary
Hunting never
stops There is too high a reduction
ratio Use two-stage reduction
The selected model is
inappropriate for the service
conditions (specifications) Check the model selection,
replace with a more suitable
unit if necessary
Chattering never
stops Condensate is entrained Install a steam trap; check
the piping
The selected model is
inappropriate for the service
conditions (specifications) Check the model selection,
replace with a more suitable
unit if necessary
Abnormal
noises Makes a high-
pitched noise The required pressure
reduction exceeds
specifications Use two-stage reduction
Flow rate exceeds
specifications Check the flow rate; check
the model selection, replace
with a unit that has a larger
nominal diameter or a more
suitable unit if necessary
A valve installed close to
the reducing valve
opens/closes too quickly Install the valve at as great
a distance away as possible
NOTE: When replacing parts with new, use the parts list for reference and replace with parts
from the Maintenance Kit, Repair Kit, etc. (Please note that replacement parts are only
available in pre-packaged kits.)