Spears Y-Check Instrucciones De Instalación

Installation Instructions
Read all applicable instructions & procedures thoroughly before starting.
Suitability of the intended service application must be determined prior to
installation. Plastic piping systems must be engineered, installed, operated
and maintained in accordance with accepted standards and procedures for
plastic piping systems. It is absolutely necessary that all design, installation,
operation and maintenance personnel be trained in proper handling,
installation requirements and precautions for installation and use of plastic
piping systems before starting. Y-Check Valves are designed for direct in-
line installation without any adjustments.
See "Precautions and Warnings" for all installations in this
instruction.
SOLVENT CONNECTIONS
90°
90°
Y-Check Valve
YC-3A-0505
Y-Check Valves automatically stop
reverse fl ow by the dead weight of the
disc plug. The valve can be mounted
in either vertical up-fl ow or horizontal
positions. However, attention must
be paid to fl ow direction as indicated
on the valve body. The valve branch
must always be oriented up to properly
operate. Spears Y-Check Valves
®
feature replaceable Seat & Seals plus
an O-ring sealed Plug on the branch
Bonnet to allow quick fl ushing to clean
out the seat area.
STEP 1 Pipe Preparation
Prepare connecting pipes as required.
Pipe ends must be cut square at 90°
using a wheel type cutter or a saw and
miter box.
Regardless of the cutting method
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Deburr Bevel
CAUTION: Care must be taken to prevent primer or cement contact with
seat or internal valve components. True Union style End Connectors
should be removed from valve body for installation.
STEP 2 Primer Application -
Primer is necessary to penetrate
& soften both pipe and socket
connector surfaces in order for the
solvent cement to properly bond.
Using a brush or applicator size no
less than 1/2 the pipe diameter,
apply a liberal coat of primer with
a circular, scrubbing motion to the
inside socket of the Y-Check Valve
until the surface is softened and
semi-fl uid. This will occur in 5 to
15 seconds depending on size and
temperature. Apply primer to the
outside of new pipe ends in the same
manner extending application area
to slightly beyond the insertion depth
of the Y-Check Valve socket, or End
Connector on True Union style.
APPLY A SECOND COAT TO BOTH PIPE AND SOCKET.
REPEAT PRIMER APPLICATION IF NECESSARY.
THE MOST FREQUENT CAUSE OF JOINT FAILURE IS INADEQUATE
PRIMER PENETRATION AND SOFTENING OF BONDING SURFACES
DURING THE WELDING OPERATION.
STEP 3 Solvent Cement End
Connection - Solvent Cement must be
applied IMMEDIATELY to the primed
surfaces before the primer dries, in
an alternating 3-coat application.
Using a brush or applicator no less
than 1/2 the pipe diameter, apply
-
a liberal coat of solvent cement to
the primed pipe surfaces. Next,
apply a light to medium coat to the
primed socket surface, then apply
an additional liberal coat again to the
pipe.
used, burrs will be created, which must
be removed. All pipe ends should be
beveled at 10° to 15°. A deburring tool
is recommended, however a fi le may
be used in its place as shown.
Wipe away all loose dirt and moisture
from pipe end and valve socket.
Check the penetration and softening
by scraping the primed surfaces. A few
thousandths of the semi-fl uid surface
should easily be removed.
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