-7-
■
EPDT-318a
■
Pressure
gauge
CT-1 Control valve
(EP-1)
DC4-20mA
Input signal
Level sensor
Tank
Pressure
gauge
CT-1 Control valve
(EP-1)
Controller
DC4-20mA
Input
signal
Controller
Temperature
sensor
Storage
Tank
【
Example of water level control
】
【
Example of temperature control
】
Signal
Valve action
（
Open degree of
valve
）
Tank
20mA
Signal
increase
4mA
Full opened
(100%)
Open
Full closed
(0%)
Water level
：
Surge
Water level
：
Increase
Water level
：
No change
Signal
Valve action
（
Open degree of
valve
）
Fluid
Fluid in the tank
20mA
Signal
increase
4mA
Full
opened
(100%)
Open
Full
closed
(0%)
Steam flow rate
：
Max.
Steam flow rate
：
Increase
Steam flow rate
：
Flow rate 0
Temperature
：
Max.
Temperature
：
Increase
Temperature
：
No change