OSBPA225-EN
7/13
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
HOW TO INSTALL A PLASTIC BALL VALVE
WARNING
• When suspending and supporting a valve, take care
and do not stand under a suspended valve.
• Be sure to conduct a safety check on all hand and
power tools to be used before beginning work.
• Wear protective gloves and safety goggles as fluid
remain in the valve even if the pipeline is empty.
(You may be injured.)
CAUTION
• When installing a pipe support by means of a U-band
or something similar, take care not to over-tighten.
(Excessive force may damage the pipe.)
• When installing pipes and valves, ensure that they
are not subjected to tension, compression, bending,
impact, or other excessive stress.
• When installing a piece of equipment at the end of
the piping line, be sure to keep the secondary
(Downstream) Body Cap and Union Nut installed on
the valve.
• When installing Ball Valve, 15 to 50 mm (1/2" to 2")
at the end, note the direction of flow.
• Find the mark molded on the Carrier-side body.
• The mark side is the primary side (upstream side).
• On the secondary (Downstream) side, the Carrier is
integral with the valve body.
• This is the preferred method if installation when
installing the equipment at the end of the line for
safety purposes.
• When installing, disassembling, or reassembling the
piping, fix the Body Cap.
• Before a water test, be sure that the Union Nut is
tightly fastened.
• Fasten the Union Nut while avoiding the parallelism
and axial misalignment of the flange surface.
• When connecting an ASAHI AV Valve to metal
piping, take care not to let the pipe stress on the
ASAHI AV Valve.
• When screwing in a Metal Insert (Ensat), install it
vertically. Refer to the User's Manual for Metal Insert
(Ensat) by the Maker.
• When loosening the union nut on the union side, fix
the body cap (hold it with your hand) and do work.
(If the body cap turns, the union will turn together,
resulting in the union and ball separating from the
body.) If the union is loosened, retighten the union.
• Take care not to over-tighten the Union Nut.
(The valve can be damaged.)
• Do not use the pipe wrench.
(The valve can be damaged.)
FLANGED END
CAUTION
• Do not use the valve to fluid containing slurry.
(The valve will not operate properly.)
• The installed valve must never be opened or closed
when foreign matter such as sand is present in the
pipeline.
• Use flat faced flanges for connection to AV Valves.
• Ensure that the mating flanges are of the same
standards.
• Be sure to use sealing gaskets (AV Gasket), bolts,
nuts, and washers and tighten them to specified
torques. (When a non-AV gasket is used, a different
tightening torque specification should be followed.)
Necessary items
Torque wrench Spanner wrench
AV gasket Bolt Nut
Washer (For many flanges specification)
PROCEDURE
1) Set the AV gasket between the flanges.
2) Insert washers and bolts from the pipe side,
insert washers and nuts from the valve side, then
temporarily tighten them by hand.
The parallelism and axial misalignment of
the flange surface should be under the
values shown in the following table to
prevent damage the valve. (A failure to
observe them can cause destruction due
to stress application to the pipe)
Valve size [mm] 015 to
032
040
080 100
Axial Misalignment [mm] 1 1 1
Parallelism (a-b) [mm] 0.5 0.8 1
3) Tighten the bolts and nuts gradually with a torque
wrench to the specified torque level in a diagonal
manner.
4) Tighten it more than 2 turns clockwise with
specified torque.
Do not tighten above the specified torque value.
(The valve can be damaged or leaks.)
Flange tightening specified torque value [Nm]
Valve size [mm] 015
020
025
032
040
050
065
080
100
Material PTFE coated
PVDF coated 17.5 20 22.5 30
Rubber 8 20 22.5 30
Union Nut
Body Cap
Designation
(Carrier side)
Body
a (Parallelism)
b
(Axial misalignment)
