12
sensing channel under the operational pressure reduction ratio of 2:1 or more.
Installation procedure
1) Loosen and remove the bolts that attach the pilot body to the main body and
remove the pilot body.
2) Install the blind pin (optional) by first removing the connecting tube from the
main body or pilot cover and then substituting the blind pin.
3) Re-install the pilot body and fasten the bolts evenly to the proper torque
(see the torque chart in the “Reassembly” section).
4) Remove the plug from the secondary pressure sensing line port and connect
the secondary pressure sensing line.
5) Install the secondary pressure sensing line with a slightly falling pitch. The end
of the secondary pressure sensing line should be connected to the place on
the main piping where the pressure is to be sensed (see the piping example on
the next page). A shut-off valve and union should be installed in the secondary
pressure sensing line.
Pilot Body
Body
Secondary Pressure Sensing Line Port
(Rc(PT)
3
/
8,
BSP
3
/
8
or NPT
3
/
8
)
Hex Bolt
Secondary Pressure
Sensing Port
Connecting Tube
Replace the factory-installed
connecting tube (has a hole)
with the optional blind pin
(has no hole).
Blind Pin
Connecting
Tube
Piping Example:
1 m (3.3 ft) or 15 d,
whichever is larger
Steam-using Equipment
Steam-using Equipment
PN-COS
15 d
or more
<
>
<
>
10 mm (3/8 in)
Pressure Sensing Line
(with a slightly falling pitch towards
the sensing point)
Ball
Valve
172-65588MA-02 (
PN-COS
Pneumatic Control Valve) 5 Sep 2014
