Spears BV-3A-1006 Instrucciones De Instalación página 2

STEP 5
Apply Primer
Primer is necessary to penetrate and soften both pipe and valve socket
surfaces in order for the solvent cement to properly bond. THE MOST
FREQUENT CAUSE OF JOINT FAILURES IS INADEQUATE SOLVENT
PENETRATION & SOFTENING OF BONDING SURFACES DURING THE
WELDING OPERATION.
1. Using a brush or applicator size no less than 1/2 the pipe diameter, apply a
liberal coat of primer with a scrubbing motion to the valve socket until the
surface is softened and semi-fluid. This may take 5 to 15 seconds depending
on size and temperature (larger diameters and lower temperatures will
increase required time).
2. Apply primer to pipe in the same manner, extending application area to
slightly more than the insertion depth into the valve socket.
3. Apply a second coat to both the valve socket and the pipe.
4. Check penetration and softening by scraping the primed surfaces. A few
thousands of the semi-fluid surface must be easily removed. Repeat primer
application if necessary.
STEP 6
Apply Solvent Cement
Solvent cement must be applied IMMEDIATELY to primed surfaces before the
primer dries, in an alternating 3-coat application. Using a brush or applicator
size no less than 1/2 the pipe diameter, apply a liberal coat of solvent cement to
the primed pipe surface, then apply a light to medium coat to the primed valve
socket. If a "net fit" was experienced during dry fit check (Step 4), apply an
additional coat again to the pipe surface. BE SURE TO USE A VERY LIBERAL
AMOUNT OF SOLVENT CEMENT ON PIPE.
VALVE INSTALLATION CAUTION: TAKE EXTRA CARE THAT NO PRIMER
OR SOLVENT CEMENT IS ALLOWED TO CONTACT THE BALL OR OTHER
INTERNAL VALVE COMPONENTS.
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STEP 7
Join Components
IMMEDIATELY following
application of cement and
before it starts to set, insert the
pipe into the valve socket with
a 1/4 - turn, twisting motion
to evenly distribute cement
within the joint. A full bead of
cement must form around the
circumference of the joint. Hold
joint together for approximately
30 seconds to make sure the
pipe does not move or back out
of the socket.
STEP 8
Remove Excess Cement
Using a cloth, wipe clean all excess cement from
the exterior juncture of the pipe and valve.
STEP 9
Initial Set & Cure Time
Initial Set & Cure Time must be followed
in accordance with the solvent cement
manufacturer's instructions.
THREADED CONNECTIONS
STEP 1
Apply Joint Sealant
Threaded connections require
application of a quality grade
thread sealant to seal and
lubricate joint assembly.
Sealant must be applied to
male pipe threads.
WARNING: THREADED CONNECTIONS — Use a quality grade thread
sealant. WARNING: SOME PIPE JOINT COMPOUNDS OR TEFLON
PASTES MAY CONTAIN SUBSTANCES THAT COULD CAUSE STRESS
CRACKING TO PLASTIC. Spears
the use of Spears BLUE 75™ Thread Sealant which has been tested for
®
compatibility with Spears products. Please follow the sealant manufacturers'
®
application/ installation instructions. Choice of an appropriate thread sealant
other than those listed above is at the discretion of the installer. 1 to 2 turns
beyond FINGER TIGHT is generally all that is required to make a sound plastic
threaded connection. Unnecessary OVER TIGHTENING will cause DAMAGE
TO BOTH PIPE AND FITTING.
STEP 2
Assemble Joint by Hand
Threaded pipe and valves or fittings must be initially assembled "finger tight"
(just enough to fully engage thread clearance).
Manufacturing Company recommends
®
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