TLV A-DR20, Инструкция по эксплуатации

Страница: 15 / 32

8. Troubleshooting
This product is shipped after stringent checks and inspection, and should perform its intended
function for a long period of time without failure. However, should there be any problem
encountered in the operation of the DR20/A-DR20, Consult the troubleshooting guide below.
Problem Cause Remedy
No steam/air is being supplied Check the primary/secondary piping
and valves of the unit The secondary
pressure does
not increase
The valve at the primary side is closed
The entrance to the screens or strainer is clogged Clean or blow down
Flow rate exceeds specifications Check the flow rate; check the model selection,
replace with a more suitable unit if necessary
Pressure fluctuation at the primary side
is large Check the primary pressure; check the
model selection, replace with a more
suitable unit if necessary
Buildup on the valve stem prevents
smooth movement through the spacer Clean and inspect the valve stem and
spacer
Flow rate fluctuation is too large Check the flow rate, re-set the pressure;
check the model selection, replace with a
more suitable unit if necessary
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
The bypass valve is leaking Check, clean, and replace with a new valve if necessary
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
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
Flow rate exceeds specifications Check the flow rate; check the model selection,
replace with a unit that has larger nominal
diameter or a more suitable unit if necessary
The valve installed close to the reducing
valve opens/closes too quickly Install the valve at as great a distance
away as possible
There is a build-up of dirt on or damage
to the main valve or the valve seat Clean and align
It exceeds the adjustable pressure
range Check the model selection, replace
with a more suitable unit if necessary
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 Adjustment is
difficult and set
pressure varies
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 or chattering
occurs at low
steam/air demand
The required pressure reduction exceeds specifications Use two-stage reduction Makes a high-
pitched noise
Hunting never
stops
Chattering
never stops
Upon closing the valves at the secondary side, the secondary pressure abruptly rises as high as the primary pressure
̶ 14 ̶
English