OSYBR23B-EN
8/9
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
HANDLING & STORAGE
HANDLING
Do not drop or throw the product as it may break.
STORAGE
• Store away from dust, moisture and direct sunlight.
If possible, store in the original package.
• Do not remove a dust proof cap until the piping.
CHECKING
• Check the product code before installation.
• Make sure that the bolts are not loose.
INSTALLATION
PRECAUTIONS
• Flush the pipeline carefully before installing the valve.
Foreign particles, such as sand or pieces of welding
electrode, will damage the ball and seats.
• For valves with specified flow direction (VR) or with
ST / SC option, check the arrows on the product
before piping.
• When the flow path is subjected to a high pressure
from arrow, it may leak slightly to the low pressure
port. (TR, LR)
PIPING FLANGES
• Gasket should be selected appropriately to suit the
fluid, pressure and temperature.
Use spring washer to prevent from decreasing surface
pressure gasket when the temperature change
happens frequently.
• Tighten all bolts using crossover method to load the
joint evenly.
• Wafer type ball valve is put between two seats of
flanged-end and tightened with long bolts. (BS)
ENVIRONMENT
If there is a possibility that the fluid and drive part
freeze, please take measures to prevent freezing.
POSITIONING
Should be positioned through 90° upward from
horizontal. Provide space around the product to allow
manual operation, inspection and replacement work.
CAUTIONS FOR MAINTENANCE (T3, L3)
Do not keep warm for maintenance of the valve gland.
TIGHTEN THE GLAND NUTS (T3, L3)
• Check that there is no leakage from the gland
packing.
• If it leakage, tighten gland nuts by alternately.
Do not over-tighten the gland nuts.
Valve size [mm] T Recommended
torques [Nm]
T3 L3
025 025 3.5
040 040
050 7
050
065
065
080 10
080
100
100
125 14
125
150 150 20
MAINTENANCE
Do the routine maintenance at least once in half a
year.
Inspection items
• Confirm operation of opening and closing.
• Confirm whether screws are loose or not.
• Confirm the fluid temperature or pressure.
• Confirm the leak from valve stem.
• Confirm the bolt tightening torque.
Packing
Gland nut
