Troubleshootingt - Cepex PVC-U Manual De Instalación Y Mantenimiento

ENGLISH
10. TROUBLESHOOTING
FAULT
The disc does not fully open
or close.
Excessive opening or closing
torque.
The valve is not completely
watertight in the sockets.
The valve is not completely
watertight at the sealing
gasket.
The valve does not open or
close.
The valve does not close
completely.
EXTREME ELECTRIC BUTTERFLY VALVE
T 9.1
POSSIBLE CAUSE
The sockets were not correctly bevelled.
Foreign materials in the compartment (adhesive, etc.).
The valve has been inactive for a long time.
High temperatures or chemicals can cause damage to
the gasket.
Excessive flange torque.
Misalignment between sockets and valve.
Misalignment between sockets and valve.
Flange screws not tight enough.
Inadequate chemical resistance.
Temperature out of range.
Lack of current.
The actuator stroke is not well adjusted to the valve.
The torque of the valve has increased above the
calculated value.
FAULT CLEARANCE
Disassemble the valve and bevel the sockets as indicated
in table T5.2.
Disassemble the valve and check for obstructions in the
disc and gasket contact area.
Operate with an auxiliary release key (not the plastic
handle).
Disassemble the valve and lubricate the sealing gasket.
Check the chemical compatibility of the liquid with the
disc and the working temperature. Replace the gasket.
Tighten flanges as indicated in table T5.1.
Disassemble the valve and reassemble with concentric
alignment (observe the correct tightening sequence and
torque).
Disassemble the valve and reassemble with concentric
alignment (observe the correct tightening sequence and
torque).
Tighten flanges as indicated in table T5.1.
Check compliance with the specifications in this
document.
Replace the gasket.
Check power supply to the actuator.
Check adjustment limits according to the actuator manual.
Check the valve: obstructions in the disc or malfunction
of the valve.
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