4. Troubleshooting
Trouble
Cause
Remedy
Outside leakage
1. The gland nut is loosened.
1. Tighten the gland nut additionally.
2. The gland packing is damaged. 2. Replace the product with new one.
3. The spindle is damaged.
3. Replace the product with new one.
Leakage from the
valve and/or valve
seat on complete
closing
1. The valve and/or valve seat is
damaged.
1. Replace the product with new one.
2. Foreign substance is stuck.
2. Remove the foreign substance.
Operation torque of
the
handle
is
abnormally large
1. Too much tightening of the
gland nut.
1. Loosen the gland nut and tighten it again to
the no leakage degree.
2. Foreign substance is stuck on
spindle and screw part.
2. Remove the foreign substance.
Abnormal sound
1. Each screw part is loosened.
1. Retighten the loosened parts.
5. Maintenance
Warning
Completely discharge the pressure inside of the product, line and equipment before inspection and
maintenance. For high temperature fluid, cool down the product till it can be touched with bare hands.
* Failure to follow this notice may result in injury or burns due to residual pressure.
Periodic inspection
Please conduct periodic inspection about once a year in order to maintain optimal performance and
function of the product.
Inspection item
●
Opening and closing operation
●
Abnormal sound
●
Outside leakage
If any abnormality is found, see “4. Troubleshooting” and conduct appropriate measure.
6. After service
1. Limited warranty
This product has been manufactured using highly-advanced techniques and subjected to strict quality control. Please be
sure to use the product in accordance with instructions on the manual and the label attached to it.
Yoshitake warrants the product to be free from any defects in material and workmanship under normal usage for a
period of one year from the date of receipt by the original user, but no longer than 24 months from the date of shipment
from Yoshitake’s factory.
2. Parts supply after product discontinuation
This product may be subject to discontinuation or change for improvement without any prior notice. After the
discontinuation of the product, Yoshitake supplies the repair parts for 5 years otherwise individually agreed.
3
．
This warranty does not cover the damage due to any of below:
(1) Valve seat leakage or malfunction caused by foreign substances inside piping.
(2) Improper handling or misuse.
(3) Improper supply conditions such as abnormal water pressure/quality.
(4) Water scale or freezing.
(5) Trouble with power/air supply.
(6) Any alteration made by other than Yoshitake.
(7) Use under severe conditions deviating from the design specifications (e.g. in case of corrosion due to outdoor use).
(8) Fire, flood, earthquake, thunder and other natural disasters.
(9) Consumable parts such as O-ring, gasket, diaphragm and etc.
Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product.
4
．
On repair request after warranty is expired
In case that performance of the product can be maintained, we repair the product with charge on customer’s request.
INTERNATIONAL DEPT. 955-5, Miyamae, Irukadeshinden, Komaki, Aichi, 485-0084, Japan
Phone: +81-568-75-4432 Fax: +81-568-75-4763 E-mail: [email protected]
