2
-Allow sufcient space for maintenance and inspection.
-Keep the valve out of direct sunlight, water and dust. Use cover to shield
the valve. (The valve will not operate properly.)
-Install the piping in such a manner that it will not be exposed to direct
sunlight. (The body may otherwise get discolored or the screen may get
distorted, resulting in failure to function.)
-Perform periodic maintenance. (Leakage may develop due to temperature
changes or periods of prolonged storage, rest, or operation.)
-When installing pipes and valves, ensure that they are not subjected to
tension, compression, bending, impact, or other excessive stress.
-When installing, disassembling, or reassembling the piping, x the End
Connector.
-Fasten the Union Nut while avoiding the parallelism and axial misalignment
of the ange surface.
-When connecting an ASAHI AV Valve to metal piping, take care not to let
pipe stress to ASAHI AV Valve.
-The Y-SEDIMENT STRAINER is so structured as to be vulnerable to
repeated stresses due to internal pressure changes in the corner. Damage
may therefore occur in a line subject to pulsation. (including air hammering
and water hammering)
-Use the valve at a level less than the permissible ow speed.
(The screen may otherwise get distorted or damaged.)(Scheme 1)
-Periodically clean the screen in accordance with use.
-Before a water test, be sure that the Union Nut is tightly fastened.
-Plumb in the strainer considering the uid direction (the arrow is shown on
the body) so that the screen points downward.(Fig.1)
General Operating Instructions
Flanged End
Installation Procedure
The connection method of the SEDIMENT STRAINER, there are Flanged End, Socket End, Threaded End. Install according to
the preferred method of joining for the particular application. As for details, refer to the User's manual separately.
-Take care not to over-tighten the Union Nut. (The valve can be damaged.)
-The parallelism and axial misalignment of the ange surface should
be under the values shown in the following table to prevent damage to
the valve.（A failure to observe them can cause destruction due to stress
application to the pipe）
-Use at faced anges for connection to AV Valves.
-Ensure that the mating anges are of the same standards.
-Be sure to use sealing gaskets (AV Gasket), bolts, nuts, and washers
and tighten them to specied torques.
1. Cleaning: Conrm the ange face area is clean and free of dirt or
foreign materials.
2. Set the AV gasket between the anges. Insert washers and bolts
from the pipe side, insert washers and nuts from the valve side, then
temporarily tighten them by hand. Tighten the bolts and nuts gradually
with a torque wrench to the specied torque level in a diagonal manner.
Table. 3 < Recommended Torque Value > Unit: N･m {kgf･cm} [lb･inch]
Nom. Size 15, 20 (1/2"-3/4") 25 - 40 (1"-1 1/2") 50, 65 (2", 2 1/2") 80, 100 (3", 4")
PTFE, PVDF coated
17.5 {179} [155] 20.0 {204} [177] 22.5 {230} [200] 30.0 {306} [266]
Rubber 8.0 {82} [71] 20.0 {204} [177] 22.5 {230} [200] 30.0 {306} [266]
Table. 2 < Axial Misalignment and Parallelism of Flanged face > Unit: mm (inch)
Nom. Size Axial Misalignment Parallelism （a-b）
15 - 32 (1/2"-1 1/4") 1.0 (0.04") 0.5 (0.02")
40 - 80 (1 1/2"-3") 1.0 (0.04") 0.8 (0.03")
100 (4") 1.0 (0.04") 1.0 (0.04")
Fig.3
(Axial Misalignment) (Parallelism)
a
Fig.2
User's Guide
For the Owner and the Installing Contractor
Serial No. :UA－006E
Fig.1
Horizontal Piping Vertical Piping
T
able.1 <Permissible ow speed>
Nominal Size
mm (inch)
Permissible Flow
Speed (m/s)
15 - 25 (1/2"-1") Less than 5m/s
32 - 50 (1 1/4", 2") Less than 3m/s
65, 80 (2 1/2", 3") Less than 2m/s
100 (4") Less than 1.5m/s
Direction of Flow
Designation
Designation
Y-SEDIMENT STRAINER
