Spears YC-3A-0314 Instrucciones De Instalación

Y-Check Valve
Installation Instructions
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.
be paid to fl ow direction as indicated
on the valve body. The valve branch
must always be oriented up to properly
operate. Spears
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.
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
STEP 1
Pipe Preparation
1
STEP 2
Assemble Joint
"HAND TIGHTEN ONLY"
STEP 3
No more than 1 to
2 turns beyond fi nger-tight thread
engagement. Care must be taken
in fi nal positioning so as to avoid
the need to "Back-up" the wrench
assembly.
Unnecessary OVER TIGHTENING will cause damage
to both pipe and Y-Check Valve.
FLANGED CONNECTIONS
Once a fl ange is attached to the pipe or valve,
the method of joining two fl anges are as follows:
STEP 1
Use of well lubricated
bolts & fl at washers are required.
Use an anti-seize lubricant, such
as IMS Copper Flake.
STEP 2
With a 1/8" gasket having a shore "A" durometer of
approximately 60 in place, align the bolt holes of the mating fl anges by
rotating the ring into position. Insert all bolts, washers, and nuts. Tighten the
nuts by hand until they are snug.
AT THIS TIME, BE SURE THAT THE FLANGE AND GASKET SURFACES
ARE FLUSH AND SQUARELY ALIGNED.
SPECIAL SPLIT RING FLANGE INSTRUCTIONS FOR 3" & 4" Y-CHECK VALVES
Place rings as shown over the fl ange
hubs at each end of the valve body.
Insert new bolts, washers and nuts into
new pipe system fl anges, through gasket
and into the split ring fl ange in alignment.
Continue to instruction 3.
DO NOT USE BOLTS TO BRING TOGETHER
IMPROPERLY MATED FLANGES.
4
Deburr and Bevel
YC-3A-0314
STEP 2
However, attention must
® Y-Check Valves
THE MOST FREQUENT CAUSE OF JOINT FAILURE IS INADEQUATE
PRIMER PENETRATION AND SOFTENING OF BONDING SURFACES
DURING THE WELDING OPERATION.
STEP 3
Use dauber no less
than 1/2 the size of
pipe diameter
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 3
The valve Seat and internal O-ring Seals can be easily accessed from the
Bonnet Nut for replacement or internal cleaning and service. CAUTION:
Before servicing, the system should be shut down, depressurized and
drained.
STEP 1
Remove Bonnet Nut by turning counterclockwise direction. Pull Bonnet
assembly, then Disc & Seat assembly from body branch. Remove O-ring
sealed Plug from Bonnet and remove Plug O-ring. Remove Bonnet O-ring
from Bonnet assembly. Remove fl at, washer-style Seat from Disc stub.
Examine O-rings and Seat for debris or damage. Clean or replace as
necessary, then reinstall on components.
Retaining Clip
Wipe away all dirt and moisture
Apply Primer
Liberal Coat
Medium
Coat
Use dauber no less
Solvent Cement End Connection
Liberal Coat
Medium
Coat
2
Tighten Bolts in 5 ft. lb. increments. . lb. increments.
1 1
5 5
8 8
3 3
4 4
7 7
BOLT TORQUE
6 6
Valve
2 2
Size
1/2" to 1-1/2" 12 ft. lbs
2" to 4" 25 ft. lbs
DO NOT USE BOLTS TO BRING TOGETHER
IMPROPERLY MATED FLANGES.
MAINENANCE & SERVICE INSTRUCTIONS
Remove the plastic Retaining Clip located at top of Bonnet.
Plug
Plug O-ring
Bonnet Nut
Bonnet
Bonnet O-ring
Disc
Seat
Body
5
STEP 4
Immediately Assemble Joint
Allow joint to cure according to solvent cement manufacturer's instructions.
STEP 5
Attach Valve Body to
End Connector Socket and tighten
Union Nut.
than 1/2 the size
of pipe diameter
DO NOT USE THE REMAINING UNION NUT TO DRAW TOGETHER ANY
GAPS BETWEEN THE END CONNECTOR AND THE VALVE BODY.
WARNING: SOME PIPE JOINT COMPOUNDS OR PTFE PASTES MAY
CONTAIN SUBSTANCES THAT COULD CAUSE STRESS CRACKING
TO PLASTIC. TRANSITIONS TO METAL PIPE REQUIRE THOROUGH
CLEANING AND DEGREASING TO REMOVE ANY PIPE THREAD
CUTTING OIL.
Spears ® Manufacturing Company highly recommends the use of Spears
BLUE 75™ thread sealant, which has been tested for compatibility with
Spears products.
®
STEP 1
Apply Joint Sealant
STEP 2
Reinstall Disc & Seat assembly into valve, Seat end fi rst.
Thread O-ring sealed Plug into bonnet until snug. Apply a mild soap & water
solution to Bonnet O-ring and slide the Bonnet assembly into the Valve body.
Install Bonnet Nut, turning in a clockwise direction until properly seated.
Reinstall Retaining Clip on groove in Bonnet at top of Nut.
STEP 1
Depressurize system
and remove O-ring
sealed drain plug.
STEP 2
Flush through valve to
remove debris.
Torque
Value
STEP 3
Reinstall O-ring
sealed plug.
Tighten snug.
CAUTION: The system must be designed and installed so as not to pull the
components in any direction. Pipe system must be cut and installed in such
a manner as to avoid all stress loads associated with bending, pulling, or
shifting. All piping systems must be supported.
CAUTION: BEFORE THE VALVE IS CYCLED, all dirt, sand grit or other
material shall be fl ushed from the system. This is to prevent scarring of
internal components; e.g. ball, cup, wedge, seats, etc.
WARNING: System should not be operated or fl ushed out at fl ow velocities
greater than 5 feet per second.
NOT FOR DISTRIBUTION OF COMPRESSED AIR OR GAS
All air must be bled from the system during the initial fl uid fi ll. Pressure testing
of the system must not be made until all solvent cement joints have properly
cured. Initial pressure testing must be made at approximately 10% of the
system hydrostatic pressure rating to identify potential problems prior to
testing at higher pressures.
15853 Olden Street, Sylmar, CA
PO Box 9203, Sylmar, CA 91392
© Copyright 2014 Spears
Printed in the United States of America 03/14.
Hold for 30 seconds
"HAND TIGHTEN ONLY"
THREADED CONNECTIONS
3
QUICK FLUSH CLEANOUT
PRECAUTIONS AND WARNINGS
SPEARS MANUFACTURING
®
COMPANY
CORPORATE OFFICE
91342
(818) 364-1611
www.spearsmfg.com
Manufacturing Company. All Rights Reserved.
®
YC-3A-0314
®