Spears DV-3A-0313 Instrucciones De Instalación

Diaphragm Valve
Installation Instructions
These instructions cover general installation for
all Spears PVC, CPVC & PP Diaphragm Valves.
®
All applicable instructions & procedures should
be read thoroughly before starting. Suitability
of the intended service application should be
determined prior to installation. Plastic piping
systems should be engineered, installed,
operated & maintained in accordance with
accepted standards & procedures.
SPECIAL INSTALLATION INFORMATION
True Union type diaphragm valves use removable end connectors. To avoid
problems, NEVER ASSEMBLE THE JOINT TO THE END CONNECTORS
WHILE THEY ARE ATTACHED TO THE VALVE CARTRIDGE.
IMPORTANT: Read Precautions & Warnings for all Valve Installations at the
end of these instructions. It is absolutely necessary that all design, installation,
operation & maintenance personnel be trained in proper handling, installation &
precautions for installation & use of plastic piping systems before starting.
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 Spears ® Valves.
CRITICAL INFORMATION
VALVE BONNET BOLT TORQUE CHECK: Valve and elastomer diaphragm
materials generally "relax" after initial assembly and a quick check of bonnet
bolt torque should be made prior to fi eld installation. Bonnet bolts should be
evenly tightened to the following specifi cations using an opposing sequence.
Bonnet Bolt Torque by Valve Size
Size Torque (in-lbs.) Size Torque (in-lbs)
1/2" 50 2" 170
3/4" 50 2-1/2" 125
1" 80 3" 125
1-1/4" 140 4" 125
1-1/2" 140 6" & 8" 125
INSTALLATION INSTRUCTIONS FOR SOLVENT
WELDING APPLICATIONS
Remove Union Nuts (1) and End Connectors (2) from the Valve Body (3) -
(instructions do not apply to spigot and fl anged valves). All components
should be removed from packaging & exposed to the installation environment
for a minimum of 1 hour to thermally balance the components. Wipe clean and
match all components to their assigned identifi cation numbers.
1
DO
REMAINING UNION NUT
TO DRAW TOGETHER
ANY GAPS BETWEEN
THE END CONNECTOR
AND THE VALVE BODY.
STEP 8
Pressure test the system only after all solvent cement
joints have fully cured. If any leaks are found at End Connectors during
pressure check, tighten Union Nut 1/16 turn to stop the leak.
DO NOT OVER TIGHTEN AS DAMAGE MAY OCCUR. DO NOT OVER TIGHTEN AS DAMAGE MAY OCCUR.
THREADED CONNECTION
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.
STEP 1
RECOMENDED SEALANT
2-3 Wraps
2.5 Mil Thick
TAPE SEALANT
4
STEP 1
Cut pipe square, de-burr, and bevel
DV-3A-0313
STEP 2
Wipe away loose dirt & moisture from pipe & components
- Slide Union Nuts over pipe ends
STEP 3
Check the Joint Interference fi t
FULL INTERFERENCE FIT
End
Connector
O-ring
End
Connector
O-ring
NOT USE THE
STEP 2
1 to 2 turns beyond
"FINGER TIGHT"
Unnecessary OVERTIGHTENING will cause damage to both pipe and valve.
Follow Step 7 and Step 8 from Solvent Welding Instructions.
STEP 1
Apply thread lubricant
STEP 2
Hand tighten only
1/8" Full Faced Gasket
STEP 3
Tigten bolts in 5 ft.
OR
lbs. increments
½
Socket
Depth
PIPE
Socket
Depth
NET FIT
Socket
Depth
2
APPLY THREAD
SEALANT
FLANGED CONNECTIONS
3 3
1 1
2 2
4 4
5
STEP 4
Apply Primer
STEP 5
Apply Cement
STEP 6
Assemble joint IMMEDIATELY - Hold for 30 seconds
Allow joint to cure according to solvent
cement manufacturer's instructions
STEP 7
Tighten Union Nuts
Hand tighten only. Hand tighten only.
3
DO NOT USE BOLTS TO BRING TOGETHER
IMPROPERLY MATED FLANGES
OFF-CENTER NOT SQUARE
CRITICAL INFORMATION
FLANGE BOLT TORQUES
Valve Size
1/2" to 1-1/2"
2" to 4"
6" to 8"
Tighten bolts in 5 ft. lbs. increments
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; 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.
SPEARS ® MANUFACTURING
COMPANY
CORPORATE OFFICE
15853 Olden Street, Sylmar, CA
91342
PO Box 9203, Sylmar, CA 91392
(818) 364-1611
www.spearsmfg.com
© Copyright 2013 Spears Manufacturing Company. All Rights Reserved.
®
Printed in the United States of America 03/13.
GAP
Torque Value
12 ft. lbs.
25 ft. lbs.
40 ft. lbs.
DV-3A-0313