AB-7356-U
9
Mounting position
The ACTIVAL can be mounted in any position ranging from upright to sideways (90
tilted). The ACTIVAL should be installed
with its actuator vertically positioned above the valve body. (See Fig. 9.) However, the ACTIVAL must be installed always in
upright position outdoors.
Figure 9. Mounting position
Piping
Check that the model number of the product is what you ordered. The model number is shown on the label attached to the
yoke.
Install a bypass pipe and gate valves on the inflow, outflow, and bypass sides. If difference between the coil side pipe
resistance (which contains coil resistance) and the bypass side pipe resistance are extremely large, use the gate valves to
adjust the pressure. Also, install a strainer with 40 or more meshes on the inflow side.
When installing the ACTIVAL to pipes, do not allow any object, such as chips, to get inside a pipe or valve. Valve cannot fully
close, or the valve seat may get damaged causing fluid leakage, due to an object jammed inside the valve.
When piping, do not apply too much sealing material, such as solidifying liquid and tape, to the pipe connection sections so
that these materials flow into the valve. Valve cannot fully close, or the valve seat may get damaged causing fluid leakage,
due to the sealing material jammed inside the valve.
Before activating the ACTIVAL, fully open (in 100 % position) the valve and flush the pipes (flush per each port) at the
maximum flow rate to remove all the foreign substances. (Factory preset position: Port A in 100 %)
Flow direction
Figure 10. Flow direction
Identification between Ports A and B
Valve body without heat insulation wrapped:
Identify ports A and B with the letters ‘A’ and ‘B’ marked on the valve body.
Valve body with heat insulation wrapped:
Identify ports A and B with the raised bar shape on the valve bonnet, as
shown in Fig. 8.
Figure 8. Identification between Ports A and B
Mixing:
Port A/Port B to Port AB
Diverting:
Port AB to Port A/Port B
Correct mounting
Incorrect mounting
Bar shape
Facing the bar shape,
Left:
Port A
Right:
Port B