TLV COSR-16, Инструкция по эксплуатации

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172-65174MA-11 (COSR Pressure Reducing Valve) 16 Feb 2022
25
Problem Symptom Cause Remedy
The secondary
pressure
cannot be
adjusted or
increases
abnormally
(continued) Adjustment is
difficult, and set
pressure varies
(continued) The small hole on the
piston is clogged Clean
The diaphragm is
distorted or damaged Replace with a new
diaphragm
There is fluctuation in
steam consumption Check the flow rate,
replace the COSR if
necessary
The selected model is
inappropriate for the
service conditions
(specifications) Check the model
selection, replace the
COSR 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
steam demand It is being operated
below the lower flow rate
limit Check the volume of
steam 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) Use a two-stage reduction
arrangement
The selected model is
inappropriate for the
service conditions
(specifications) Check the model
selection, replace the
COSR 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
COSR if necessary
Abnormal
noises
Makes a high-
pitched noise
There is too high a
reduction ratio, Use two-stage reduction
The flow is too great, Check the flow rate, use a
larger size valve
There is a high-speed
open/close valve nearby Install the valve as far
away as possible
NOTE: When replacing parts with new for the COSR-3 and COSR-16, use the parts list for
reference, and replace with parts from the kits shown there. Please note that replacement
parts for the COSR-3 and COSR-16 are only available as part of a replacement parts kit.
Contact TLV if replacement parts for the COSR-21 are required.