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12
12
-7
Air Operated V
alve/Contr
ol V
alve
Air Operated Valve/Control Valve
Warning and caution for installation
1. Before connecting the product to piping, remove foreign substances and scales inside the piping. Note that
the seal material must not flow into the inside of the product.
* Contamination of foreign substances can cause valve seat leakage and malfunction.
2. When installation, check the direction of the product so that the fluid flowing and the arrow marked on the
product are in the same direction.
3. As shown in the above figure, it is recommended that stop valves, strainers, pressure gauges and
bypass line are installed to the piping. For screwed valve, a union joint is recommended to install for easy
maintenance and inspection.
4. Make sure to install a strainer with the mesh size 80-100 at the inlet side of the product.
5. Avoid over-tightening of screw and excessive stress imposed from the piping in order to prevent malfunction
due to the distortion of the body.
6. Recommend the upright installing position for the control valve (top drive unit).
7. Secure a space required for disassembly or removal of the product at the time of maintenance and inspection.
8. Control Valve is not explosion-proof. Do not use in the area or ambience where explosive gasses accumulate.
9. When using at the outdoor, set eaves to avoid direct rain.
Piping example
DC: 4-20 mA
Input Signal
Storage tank
Sensor
Pressure
gauge
Stop valve
CT-1 Control valve
Strainer
Bypass
Stop valve
Pressure
gauge
Stop valve
[For temperature control]
·Standard opening signal and valve opening, flow rate, temperature relationship.
·Installation posture
Recommend the upright installing position
for the control valve (top drive unit).
Driving part
Signals (DC)
20 mA
Fully open
(100%)
Steam amount:
Maximum
Temperature:
Maximum
Increase
signal
Open
Steam amount:
Increase
Temperature:
Slow increase
4 mA
Fully close
(0%)
Steam amount:
Flow rate 0
Temperature:
Stable
Valve operation (valve opening) Condition of fluid
Condition of fluid inside of tank
Controller
Guidelines for Installing Control Valve