6.1 Before Disassembly; 6.2 Disassembling The Adjustment Section; 6.3 Disassembling The Pilot Section - TLV COS Série Manuel D'utilisation

CAUTION

6.1 Before Disassembly

Remove all steam from the piping (both upstream and downstream). If the steam supply to the
system cannot be shut off, change over to bypass operation. Close shutoff valves at the inlet
and outlet of the COS/COSR completely. Relieve residual steam pressure by loosening slightly
the spring housing bolt and pilot screen holder or sensing line plug. Wait for the body to cool
before attempting to remove the COS/COSR from the line. Then remove inlet and outlet flange
retaining bolts and trap discharge pipe union connection (COS) to permit removal of the
COS/COSR for disassembly and inspection. Secure the COS/COSR in a vise to perform the
inspection.

6.2 Disassembling the Adjustment Section

Loosen the adjustment screw completely and remove the bolts. Having removed the spring
housing, you will see the diaphragm support, coil spring, spring retainer and ball.
Check for seizure or any damaged screw threads.
/
1
15 - 150 mm (
2
Ball
Spring Retainer
Coil Spring
Diaphragm
Support

6.3 Disassembling the Pilot Section

The diaphragm is removed by utilizing the notch in the pilot body. Loosen and remove the pilot
valve seat with a box wrench. Pick up the pilot valve and the pilot valve spring with a pair of
tweezers. Loosen the pilot screen holder to remove the pilot screen.
• Installation, inspection, maintenance, repairs, disassembly, adjustment
and valve opening/closing should be carried out only by trained
maintenance personnel.
• Be sure to use the proper components and NEVER attempt to modify the
product.
" - 6")
Locknut
Spring
Housing
Bolt
Adjustment Screw
̶ 16 ̶
Spanner Cap
Nameplate