Spears USCV-3A-0613 Instrucciones Generales De Instalación

PVC Utility & True Union
SWING & SPRING CHECK VALVES
Installation Instructions
U.S. Patent No. 7,004,194
Read all applicable instructions and
procedures thoroughly before starting.
Suitability of the intended service
application must be determined prior
to installation. Please review "Material
Considerations in Application and
System Design", in the Materials section
of Spears ® ' THERMOPLASTIC VALVE
PRODUCT GUIDE & ENGINEERING
SPECIFICATIONS, V-4, for important
additional considerations related to
valve installations.
systems must
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.
Swing Check & Spring Check Valves are designed for horizontal installations,
but may be installed in up-fl ow only vertical applications.
Check valves must be installed with the valve fl ow arrows pointing in the
direction of fl ow. Do not install upside down. A minimum of 10 pipe diameters
should be maintained from any pump or turbulent source.
GENERAL INSTALLATION INSTRUCTIONS
Prepare connecting pipe as required for solvent cement or thread
STEP 1
connections.
Support valve body to hold its weight. Make sure valve is positioned
STEP 2
as indicated "This Side Up" with proper flow direction. Attach one end connector of
valve according to Solvent Cementing or Threading Procedures on the following
pages.
Repeat Step 1 to attach opposite end connector of valve to pipe,
STEP 3
making sure valve is aligned with pipe.
STEP 4 Pressure test system only after all solvent cement joints have fully
cured. Flanged connections may require additional tightening after initial pressure
testing.
True Union Valve Assembly
Must be installed
"THIS SIDE UP"
and in proper
flow direction
Socket/Thread Valve Body
1
TRUE UNION CONNECTIONS
SPECIAL INSTALLATION INFORMATION
True Union type ball valves use removable end connectors. To avoid problems, NEVER
ASSEMBLE THE JOINT TO THE END CONNECTORS WHILE THEY ARE ATTACHED
TO THE VALVE CARTRIDGE.
2. End Connector
3. Check Valve Body
1. Union Nut
Must be installed
"THIS SIDE UP"
and in proper
flow direction 4. Typical Valve Support
LUBRICATION WARNING: Some Lubricants, including vegetable oils, are known
to cause stress cracking in thermoplastic materials. Formulation changes by
lubricant manufacturers may alter compatibility of previously acceptable materials and
are beyond our control. Lubricants are not required for installation of valves.
STEP 1
Pipe Preparation - See STEP 1, Sovent Cement Welded Joints.
STEP 2
Remove Union Nuts (1) and End
Connectors (2) from the Valve Body (3). Wipe
away all loose dirt & moisture from the pipes &
components with a clean dry cloth. Slide Union
Nuts (1) over pipe ends where each End Connector
Socket is to be installed, being sure that the Union
Union Nut threads face Valve Body
Nut threads will be facing the Valve body.
STEP 3
Check the Joint Interference fit
Do not use
components
which do not
properly mate.
BE SURE THAT THE FACE OF EACH END CONNECTOR
SOCKET IS AT A SQUARE 90° ANGLE WITH THE PIPE END.
4
For best results, installation must be made at temperatures between 40°F and
110°F. All joint components must be inspected for any breaking, chipping,
gouging or other visible damage before proceeding. All pipe, fi ttings and
valves must be removed from their packaging or containers and exposed to
USCV-3A-0613
the installation environment for a minimum of one hour in order to thermally
balance all components. All joining components must be clean and dry.
TAKE EXTRA CARE THAT NO PRIMER OR SOLVENT CEMENT IS ALLOWED
TO COME IN CONTACT WITH INTERNAL VALVE COMPONENTS.
STEP 1 Pipe and Component Preparation
Plastic piping
be engineered,
STEP 2
Check Dry Joint Interference Fit
valve socket. DO NOT FORCE. Interference between pipe and valve must occur between
½ of the socket depth (full interference fit) and the socket bottom (net fit). Do not use
components which improperly mate
NET FIT
Socket Depth
STEP 3
Apply Primer
THE MOST FREQUENT CAUSE OF JOINT FAILURES ARE INADEQUATE SOLVENT
PENETRATION & SOFTENING OF BONDING SURFACES DURING THE WELDING
OPERATION.
STEP 4
Apply Cement
PIPE
STEP 5
Join Components
STEP 4
Apply Primer
STEP 5
Apply Cement
Slide Union Nut onto pipe FIRST
PIPE
Valve Body
STEP 6
Join Components
Repeat STEP 6 to attach opposite end connector to pipe. Allow joint to cure
according to solvent cement manufacturer's instructions.
STEP 7
Attach Valve Body to End Connector
Socket and begin to tighten Union Nut.
BE SURE THAT THE FACE OF THE END CONNECTOR SOCKET IS SQUARELY
ALIGNED (FLUSH) WITH THE VALVE BODY AND IS FLUSH AGAINST THE O-RING.
MUST BE INSTALLED "THIS SIDE UP" AND IN PROPER FLOW DIRECTION
SOLVENT CEMENT WELDED JOINTS
- To check, lightly insert pipe into
½
Socket
FULL INTERFERENCE FIT
Depth
PIPE
PIPE
Socket Depth
Apply a second coat to both.
SOCKET
IMMEDIATELY
Hold for 30
seconds
2
PIPE
UNION NUT
ONE-WAY
MOTION
Apply a second
coat to both.
PIPE
UNION NUT
ONE-WAY
MOTION
IMMEDIATELY
Hold for 30 seconds
g g
"HAND TIGHTEN ONLY"
CE OF THE END CONNECTOR SOCKET IS SQUARELY
5
STEP 6
Initial Set & Cure
Time
- Initial Set & Cure Time must
12
1 1 1
be followed in accordance with the
1 0 2
solvent cement manufacturer's
3
9
instructions. Pressure test the
system only after all solvent 8 4
7 6 5
cement joints have fully cured.
THREADED CONNECTIONS
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.
RECOMMENDED SEALANT
: Spears ® Manufacturing Company highly recommends
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 another appropriate thread sealant is at the discretion of the
installer.
IF A TAPE SEALANT IS USED:
1. Use TFE tape no less than 2.5 mil thick.
2. Initial wrap must fully cover the thread end.
3. Wrap clockwise with standard pipe threads.
4. Use only 2-3 wraps of tape.
STEP 1 Apply Joint Sealant
STEP 2
Assemble Joint by Hand
HAND TIGHT ONLY
STEP 3
Wrench Make-Up
Apply wrench make-up of no more than one to two turns beyond hand tight thread
engagement. Care must be taken in final positioning so as to avoid the need to "back-up"
the wrenched assembly.
3
Attach fi nal Union Nut to Valve Body.
"HAND TIGHTEN ONLY"
DO NOT USE THE REMAINING UNION NUT TO T TO
DRAW TOGETHER ANY GAPS BETWEEN THE THE
END CONNECTOR AND THE VALVE BODY. Y.
STEP 8
Initial Set & Cure Time must be followed in accordance
with the solvent cement manufacturer's instructions. Pressure test the
system only after all solvent cement joints have fully cured. If any leaks
are found at End Connectors during pressure check, use a strap wrench
to tighten Union Nut 1/16 turn to stop the leak. p
1/16 TURN
DO NOT OVER TIGHTEN AS DAMAGE MAY OCCUR.
PRECAUTIONS AND WARNINGS
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.
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.
SPEARS ® MANUFACTURING
COMPANY
CORPORATE OFFICE
15853 Olden Street, Sylmar, CA
91342
PO Box 9203, Sylmar, CA 91392
(818) 364-1611
www.spearsmfg.com
© Copyright 2015 Spears ® Manufacturing Company. All Rights Reserved.
Printed in the United States of America 02/15. USCV-3A-0613