4.16 External Sensing Line - TLV COS Série Manuel D'utilisation

4.16 External Sensing Line

NORTH AMERICAN MODELS
North American models are factory prepared for external sensing.
An external sensing line MUST be installed.
DO NOT SUPPLY STEAM until all piping and a 10 mm (
with a slightly falling pitch have been properly installed. Install a shutoff valve in the pressure
sensing line for maintenance purposes.
CAUTION
OTHER MODELS
Other models are factory prepared for internal sensing.
A secondary pressure detection port has been added to all COS/COSR pilot bodies to allow
for installation of a 10 mm (
and increases valve capacity (flow rate). All except North American models are delivered with a
secondary pressure sensing line plug installed in this port.
When the external detection method is used, follow the installation procedure shown below:
(for North American models, the blind pin has been factory installed and no secondary
pressure sensing line plug is provided).
1. Loosen and remove the four (4) bolts (A) that attach the pilot body to the main body (15 - 50
/
mm, "- 2") or the pilot cover (65 - 150 mm, 2
1
2
2. Install the blind pin (B) provided by first removing the connecting tube (C) from the main
body or pilot cover and then substituting the pin.
Connecting tube
Keep the shutoff valve in the pressure sensing line open at all times
during operation. If the shutoff valve is closed, COS/COSR will fully open
and PRIMARY PRESSURE WILL BE SUPPLIED TO THE EQUIPMENT
(see 4.16 number 5).
/
") secondary pressure sensing line, which improves performance
3
8
15 - 50 mm
/
( " - 2")
1
2
○
D
○
A
○ ,○
C
B
Blind pin
̶ 12 ̶
/
") secondary pressure sensing line
3
8
/
"- 6"), and remove the pilot body.
1
2
○ ,○
C
B
Rc(PT)
/
3
NPT
/
3
BSP
○ ,○
B C
65 - 150 mm
/
(2 " - 6")
1
2
○
D
○
A
/
3
8
(stamped N)
8
(stamped B)
8