Cameron Demco Manuale di installazione, funzionamento e manutenzione - Pagina 11

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The valve
will not open.
The valve is leaking
around stem.
Handle or actuator does not provide
The valve closes with
line flow.
Flange seal surface on seat is damaged.
Flange leaks.
Clockwise rotation of
Gear Operator
handwheel opens
valve. Open-Shut
indicators do not
coincide with
valve disc position.
Automatic actuator
slams valve shut or
open.
Hard, soft or cracked
seat damage is
present.
* Contact your Cameron representative for repair manual.

CONTACT INFORMATION

HEADQUARTERS
3250 Briarpark Drive, Suite 300
Houston, TX 77042
USA
Tel 281 499 8511
MANUFACTURING
th
845 SE 29
Street
Oklahoma City, OK 73143
Tel 405 631 1321
For more information:
TC-003001-01 / Rev 2
Disc hits on side of pipe.
Seat is damaged or worn.
Disc is bent.
Flange seal is leaking
proper restraint.
Line flow too great.
Flange surfaces are damaged or
corroded.
Flange bore is too large.
Gear operator has been rotated
90° on valve top.
Handwheel shaft aligns with pipe
(should be perpendicular).
Speed control valves missing or not
adjusted.
Heat or chemical damage to seat
www.c-a-m.com/DEMCO
Check for proper pipe clearance.
Replace disc, stems and seat as required*
Correct flange seal leak to prevent fluid from migrating
Restrain disc with handle or actuator.
Choose larger valve or slow down flow.
Clean, repair or replace flanges.
Replace with proper flanges.
Rotate gear operator 90° on valve top to put input shaft
perpendicular with pipe axis.
Install and/or adjust speed control valves.
Replace elastomer seat with compatible material and/or
correct offending fluid conditions.
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11
Replace Seat.*
behind seat and out stem.
Replace seat.*