Troubleshooting - Yoshitake AF-10EN Product Manual

7.3 Troubleshooting

Trouble
Leakage
*
from outlet
Blows at a pressure
lower than the set
pressure
Does not blow at
the set pressure
Cause
1. Foreign substance is stuck
between valve and valve seat.
2. Sealing surface of valve seat is
damaged.
3. Vibration transmitted from the piping, on
which the product is installed, causes
malfunction of the product.
4. The pressure momentarily exceeds
the set pressure because of fluid
pulsation.
5. Difference between the set pressure
and the normal working pressure is
too small.
6. Fluid flows into the outlet piping.
1. Product specifications are not
consistent with the usage conditions.
2. Pressure gauge is out of order.
3. Sealing surface of valve seat is
damaged.
4. The product does not keep the
accuracy of its set pressure.
1. Product specifications are not
consistent with the usage conditions.
2. Pressure gauge is out of order.
3. The product does not keep the
accuracy of its set pressure.
4. Sliding parts of the valve and valve
seat do not move smoothly.
5. There is a back pressure at the piping
of the product outlet.
1. Follow the procedure described in
7.2 (2) to operate the product and
eliminate the foreign substances.
Please contact us if the leakage
does not stop.
2. The product needs to be replaced.
Please contact us.
3. Do not use the product to
equipment or device that vibrates
excessively.
4. In view of fluid pulsation, the set
pressure needs to be raised
(readjusted) or the normal
working pressure needs to be
lowered. The product needs to be
returned to Yoshitake to raise
(readjust) the set pressure.
5. The product needs to be returned
to Yoshitake.
6. Change the piping layout to keep
the fluid from flowing into the
outlet piping.
1. Check the set pressure value
shown on the nameplate. If the
product is not suitable for the
usage conditions, replace it with a
proper one.
2. Calibrate or replace the pressure
gauge.
3. The product needs to be
replaced.
Please contact us.
4. The product needs to be returned
to Yoshitake for set pressure
adjustment.
1. Check the set pressure value
shown on the nameplate. If the
product is not suitable for the
usage conditions, replace it with
a proper one.
2. Calibrate or replace the
pressure gauge.
3. The product needs to be returned
to Yoshitake for set pressure
adjustment.
4. The product needs to be
returned to Yoshitake, and
disassembled and cleaned.
5. Remove the back pressure.
Change the piping layout to
eliminate the back pressure.
9
Remedy
■EPDT-395■