172-65604MA-00 (
PN-COSR
Pneumatic Control Valve) 10 Sep 2014
13
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
Pilot Body
15 – 25 mm (
1
/
2
– 1 in)
40, 50 mm (1
1
/
2
, 2 in)
Body
Piping Example:
PN-COSR
15 d
or more
10 mm (
3
/
8
in)
Pressure Sensing Line
(with a slightly falling pitch
towards the sensing point)
Ball
Valve
1 m (3.3 ft) or 15 d,
whichever is larger
Steam-using
Equipment
12. 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.
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-COSR-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.
Blind Pin
Connecting Tube
