13
14. Internal sensing for North American models
All models except North American models are factory prepared for internal sensing.
When internal pressure sensing is required for North American models, please
contact the nearest TLV representative to request both a connecting tube, which
must be installed in place of the blind pin, and a threaded secondary pressure
sensing plug. Follow the connecting tube installation procedure shown below:
1) Loosen and remove the four (4) bolts that attach
the pilot body to the main body and remove the
pilot body.
2) Install the connecting tube by first removing the
blind pin from the secondary side of the main body
and then substituting the connecting tube.
Blind Pin
Connecting Tube
3) Re-install the pilot body and fasten the four (4) bolts evenly.
See the torque chart in the “Reassembly” section in this manual for torque
requirements of these bolts.
4) If a secondary pressure sensing pipe has previously been installed, remove it
and be certain to install the threaded secondary pressure sensing line plug in its
place.
NOTE: When 15 mm (
1
/
2
in) or 20 mm (
3
/
4
in)
PN-COS-16
is used below 0.3 MPaG
(45 psig) and 0.1 MPaG (15 psig) respectively, and below 50% of primary
pressure, internal sensing may provide decreased capacity (Rated Flow
Rate) compared to external sensing.
Verify the capacity before switching to internal sensing.
172-65588MA-02 (
PN-COS
Pneumatic Control Valve) 5 Sep 2014
