Installation, Operation and Maintenance Manual
󲷇H-A069-E󲷈 Ball Valve Type2121α Pneumatic Actuated Type AR 15-50mm (1/2”-2”) 30
23. Troubleshooting
Problem Cause Treatment
The spanner does not
turn (or cannot rotate)
during manual
operation at double
acting type.
Already fully open or fully shut. Turn the spanner in the opposite
direction.
Air is supplied to the actuator. Close the master valve for operation
air, and open the bypass valve.
Foreign matter is in the valve. Disassemble valve to remove foreign
matter.(Refer to pages 28)
Valve torque is increasing due to piping
stress. Remove the piping stress.
The torque is increased by the influence
(temperature, components, pressure) of
fluid on the valve.
Check the service condition.
(Refer to pages 5)
The valve does not
operate by air
operations.
The power source of the control panel is
Turned off. Turn on the power source.
The solenoid valve is disconnected. Check the connection again.
(Refer to page 7 and 18)
Air is not supplied to the solenoid valve. Supply air to solenoid valve.
The supply voltage to the solenoid valve
is wrong. Check voltage with a tester and set
specified voltage.
The voltage to the solenoid valve is low.
The bypass valve opens.
Close bypass valve by turning the
bypass valve knob in a clockwise
direction.
The speed controller’s knob is fully
turned in a clockwise direction.
Turn speed controller’s knob in a
counterclockwise direction.
(Refer to pages 21)
Foreign matter is in the valve.
Disassemble valve to remove foreign
matter.
(Refer to pages 28)
Valve torque is increasing due to piping
stress. Remove the piping stress.
The torque is increased by the influence
(temperature, components, pressure) of
fluid on the valve.
Check the service condition.
(Refer to pages 5)
Fluid leaks from the
valve even when the
valve is closed fully.
The Carrier is loosened. Adjust the face pressure between the
ball and the seat.(Refer to pages 27)
The seat is worn. Replace the seat with a new
one.(Refer to pages 28)
The seat and ball are scratched. Replace scratched parts with new one.
(Refer to pages 28)
Foreign matter is in the valve.
Discharge the foreign matter from the
valve by opening and closing the valve
several times.
Fluid leaks from the
valve.
The Union nut is loosened. Tighten the Union nut.
The O-ring is scratched or worn. Replace the O ring with a new one.
(Refer to pages 28)
The O-ring is projected from the groove.
The sliding face or the fixed face of the
O-ring is scratched or worm.
Replace scratched parts with new one.
(Refer to pages 28)
The actuator
operates, but the
valve does not open
or close.
The stem or the shaft adapter is broken.
Replace scratched parts with new one.
(Refer to pages 28)
The engagement between the stem and
the ball is broken.
Terms of Use | Privacy Policy | DMCA Policy
2006-2021 Rsmanuals.com