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Temperature Regulator – Annex
CAUTION
Trouble
Temperature
does not rise.
Temperature
rises
excessively.
Large error of
temperature
control.
Outside
leakage.
Special specifications
· OB-2000
13
Completely discharge the internal pressure from the valves before disassembly.
-41
13
Please refer to the manual attached to the product for procedures for installation and operation.
Cause
Inadequate adjustment. .....................................
Nominal size of the product is too small ...........
for the specifications of the system.
Temperature range of sensor is not proper. ......
Ambient temperature exceeds set temperature. .....
Insufficient drainage from the trap of heat exchanger. ...
Main diaphragm is damaged. ............................
Joint C orifice is clogged. ..................................
There is no orifice in Joint B. .............................
Inadequate adjustment. .....................................
Foreign substances are stuck between main ....
valve and main valve seat, or either of the
parts is damaged.
Foreign substances are stuck between pilot ....
valve and pilot valve seat, or either of the
parts is damaged.
Joint B orifice is clogged. ..................................
Thermal bulb or bellows is damaged. ...............
Leakage from by-pass line. ...............................
Thermal bulb and thermometer are ...................
installed in wrong positions.
Inlet pressure is too high. ..................................
Spindle and guide, or, pilot valve and ...............
guide do not move smoothly.
Leakage from the gasket. .................................. Retighten or replace the gasket.
Seal bellows is damaged. .................................. Replace the seal bellows.
Readjust according to the adjustment procedures.
Replace the product with one of proper nominal size.
Check the label and replace the sensor.
Lower the ambient temperature by providing fans
or ventilation windows.
Open the trap's by-pass line and check the condition.
Detach Joint C and open the by-pass valve. If the fluid flows
out from the diaphragm chamber, replace the diaphragm.
Disassemble and clean.
Replace it with proper one.
Readjust according to the adjustment procedures.
Release the adjusting spring and detach the pipe D, and
supply fluid from the inlet. If the fluid flows out from the tee,
disassemble and clean. In case of damage, lap the parts.
Detach pipe D and apply fluid to the inlet, while applying thermal bulb
with a temperature higher than set temperature. If the fluid flows out
from elbow, disassemble and clean. In case of damage, lap the parts.
Disassemble and clean.
Replace the sensor.
Repair or replace.
Reinstall them at points where the circulation is
best.
When steam consumption is small, lower the inlet
pressure for better temperature control.
Disassemble and clean, or replace.
Thermal well
(stainless-steel made)
www.yoshitake.jp
Remedy
Temperature regulator
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