Q1 Fluid can't be flowed.

The valve is piped together with the dust seal.

Please remove the valve from pipe and install in pipe after removed the dust seal from the valve.

Q2 Leakage from ball seat.

The ball seat is damaged by foreign object.

Please replace ball seats, washing, flashing and install the valve.

The ball seat is transforming because of used by half open position(in case of soft seat ball valve).

Please replace ball seats.
Note: It must not be used a soft seat ball valve by half open position, because it causes the ball seat transformation.

The ball seat is transfomed by themal expansion inside cavity of valve.

1. Please replace the ball seat and countermeasure thermal expansion inside cavity problem.
2. Please replace to the 1-way valve or the trunnion type ball valve.

The ball seat is transformed by abnormal increasing pressure in the piping.

Please countermeasure at system side, because this case can't solve at valve side.

1-way direction valve is installed on piping with wrong direction.

Please install in the correct direction after confirmed the pressurized direction of when valve is closed.

Mis-selection for material of ball seat.

1. Please reconfirm the operation condition.
2. Please replace ball seat or ball valve.

Q3 Leakage from body gasket.

Looseness of the fitting flange's stud bolt & nut

Please increase of tightening bolts by diagonal turns and equal torque.

Looseness of the fitting flange's stud bolt & nut by the piping-stress

Please install the piping-support so that piping-stress is not affected, and increase of tightening bolts by diagonal turns and equal torque.

The body gasket is damaged by thermal expansion inside cavity.

1. Please replace body gasket and countermeasure thermal expansion inside cavity problem.
2. Please replace to the 1-way valve or the trunnion type ball valve.

Q4 Leakage from gland packing.

Looseness of the gland bolt.

Please increase of tightening bolts by diagonal turns and equal torque.

The gland packing wears away.

Please replace the gland packing

Leakage by thernal expansion inside cavity.

1.Please increase of tightening bolts by diagonal turns and equal torque, and countermeasure thermal expansion inside cavity.(if the gland packing lose the sealing, please replace to new one.)
2. Please replace to the 1-way valve or the trunnion type ball valve.

Transformation of the gland packing by heat cycle

Please recheck the material of gland packing and replace it.
Please replace the valve that have a gland O-Ring.

Q5 Valve can't be operated.(Manual/On-Off valve)

Foreign object into valve body.

Please replace ball seats, and do the flushing for cleaning.

Ball seat wears away hardly.

1. Please replace the ball seats. (if it is a necessity, please replace the ball also.)
2. Please change to the metal seats ball valve.

Powder material has been compressed & cristalized.

1. Please wash & flush inside body, periodicity.
2. Please replace ball seat.(depends on neccesity to replace ball also).
3. Please recheck the sizing torque of actuator.

Q6 Valve can't be operated.(On-Off Valve)

Shortaged supply pressure/air volume for operation.

Please secure the pressure according to neccesity(Please install air tank according to neccesity.)

Compressor trouble

Please check the compressor.

Clogged and broken air tubing.

Please repair the air tubing.

Troubled filter regulator.

1. Please discharge the drain.
2. Please replace the filter regulator.

Narrowed speed controller too much.

Please do re-setting the speed controller

Wearing piston o-ring of actuator.

Please replace the O-ring

The bypath valve is opened.

Please close the bypath valve.

Vent hole of solenoid valve is plugged by dust cap.

Please take off the dust cap

Air tubing is blinding by seal tape.

Please repair the air tube.

Q7 Solenoid valve can't be operated correctly.

The coil is transformed by too much tightening the conduit to the solenoid valve.

Please replace the solenoid valve

The spool is transformed by too much tightening the ring joint to the solenoid valve.

Please replace the solenoid valve

The electric voltage is incorrect

1. Please check the voltage
2. Please check the specification of solenoid valve
3. Please replace the solenoid valve

Mis-operated manual switch.

Please operate manual switch with correct.

Incorrect wiring or leaking current inside solenoid valve.

Please check the wiring and repair it

Breaking of Wire.

Please check the wiring and repair it

Mis-connecting air tubing.

Please check the air tubing and repair it

Foreign material (like seal tape) into solenoid valve.

1. Please remove the foreign material.
2. Please replace the solenoid valve

The rainwater into the solenoid valve.

1. Please use the solenoid valve of weather proof type
2. Please check the conduit/the piping connection of wiring and repair them.

There is the extraordinary vent from the solenoid valve

Please check the bypath valve and repair it.

The pilot port is closed.

Please open the pilot port.

Q8 Limit switch can't be operated correctly.

Incorrect wiring or leaking current inside limit switch.

Please check the wiring and repair it

Breaking of Wire.

Please check the wiring and repair it

The striker position is incorrect.

1. Please do the setting of the striker position.
2. Please tighten the fixing bolt of striker additionally.

Q9 Proximity sensor can't be operated correctly.

The detection distance is incorrect

Please re-set the position of proximity switch.

The wiring mistake / breaking of wire.

Please check the wiring and repair it.