Yoshitake BLV-1S User manual

EPDT-363
BALL VALVE BLV-1S
PRODUCT MANUAL .
Thank you very much for choosing the Yoshitake product. To ensure the correct and safe use of the product,
please read this manual before use. This manual shall be kept with care for future references.
The symbols used in this manual have the following meanings.
Warning
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
Caution
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury or may result in only property damage.
1. Specification
Model
BLV-1S
Nominal size
8A-50A
Application
Steam,Air, Cold and hot water, Oil, Other non-dangerous fluids
Maximum pressure
According to pressure and temperature rating
Maximum temperature
Material
Body
Stainless steel
Ball
Stainless steel
Ball seat
PTFE
Connection
JIS Rc, NPT
Pressure and temperature rating
Caution
Please confirm that the indications on the product correspond with the specifications of the ordered
product model before use.
* If they are different, please contact us without using the product.

2. Storage / Installation / Operation
Warning
Before applying fluid, make sure that there is no danger if the fluid flow into the end of the piping.
*Failure to follow this notice may result in property damage due to fluid leakage.
Caution
(1) Store the product indoors in a dust free, low humidity, dry and ventilated environment.
(2) Installation should be conducted by suitably trained personnel, wearing protective head, eye, hand
and foot protection.
(3) The product can be used for “complete opening” and “complete closing”. If the product is used at
intermediate opening, ball and ball seat may be damaged.
(4) Be careful that the threaded connection between the mating pipe and the internal threaded
connections of the valves are in line to avoid piping stresses in the valves.
(5) During transportation or storage of the product leakage may occur from the packing due to
decreasing of tightening pressure by stress relaxation of the packing. Be sure to retighten the stem
nut before use.
(6) When connecting the product and the piping, apply seal agent (such as seal tape) to the screw part
of the piping. Use seal agent appropriate for temperature, fluid, etc.
(7) Slide the lock plate to operate the handle.
(8) To connect the product to piping, use appropriate tool such as spanner with spanner apply part near
the piping. In addition, do not make piping work with applying a pipe wrench to the product. If doing
so, it leads to malfunction of the product.
(9) There are no restrictions on the flow direction for the product.
3. Troubleshooting
Trouble
Cause
Remedy
Outside leakage
1. Tightening of the stem nut is
loosened.
1. Tighten the stem nut additionally.
2. The grand packing is damaged.
2. Replace the product with new one.
3. The stem is damaged.
3. Replace the product with new one.
Leakage from the
ball part on
complete closing
1. The ball and/or ball 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
washer of packing.
1. Loosen the stem nut and tighten it again
until leak stops.
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.
4. 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.

5. 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: [phone] Fax: [phone] E-mail: [email protected]