Spears GV-3A-1212 Instrucciones De Instalación

GATE & PLUG GATE VALVES
Installation Information
These instructions apply to all Spears ® Regular and Plug Gate Valves.
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
VALVE PRODUCT GUIDE & ENGINEERING SPECIFICATIONS, SSB-1,
for important additional considerations related to valve installations. 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.
Valves are designed for direct in-line installation without any adjustments.
(See "Precautions and Warnings For All Valve Installations" on back page.)
STEP 1 Prepare connecting pipe as required for solvent cement,
thread, or fl anged connections.
STEP 2
Open the valve completely and
support valve body to hold its weight. Attach
one end connector of valve to pipe, making
sure valve is aligned with pipe, according to
the Solvent Cementing, Threading or Flanging
procedures listed on the following pages.
STEP 3 Repeat Step 1 to attach
opposite end connector of the valve to pipe,
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.
1
STEP 7
Join Components IMMEDIATELY
HOLD FOR 30 SECONDS
STEP 8
Remove Excess Cement
STEP 9
Initial Set & Cure Time - Initial Set & Cure Time must be
followed in accordance with the solvent cement manufacturer's instructions.
THREADED CONNECTION
WARNING: SOME PIPE JOINT COMPOUNDS OR PTFE PASTES MAY CONTAIN
SUBSTANCES THAT COULD CAUSE STRESS CRACKING IN 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 Manufacturer's 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
25 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.
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
GV-3A-1212
the installation environment for a minimum of one hour in order to thermally
balance all components. All joining components must be clean and dry.
Be sure the valve is in the open position to aid in evaporation of solvent
vapors which can attack internal components. TAKE EXTRA CARE THAT
NO PRIMER OR SOLVENT CEMENT IS ALLOWED TO COME IN CONTACT
WITH INTERNAL VALVE COMPONENTS.
STEP 1
Cut Pipe Square
® THERMOPLASTIC
STEP 2
Deburr & Bevel Pipe
STEP 3
Clean Joint Components
STEP 1
Apply Joint Sealant to Male Threads
STEP 2
Assemble Joint by Hand - Threaded pipe and valves must
be initially assembled "fi nger tight" (just enough to fully engage thread
clearance).
Full faced, 1/8"
Elastomer Gasket
Connecting Pipe
HAND
TIGHTEN
ONLY
SOLVENT CEMENT WELDED JOINTS
DO NOT ATTEMPT
TO JOIN WET
SURFACES
2
FLANGED CONNECTIONS
Gate Valve Body
Bolt, Washers, Nut
DO NOT USE BOLTS TO
BRING TOGETHER
IMPROPERLY MATED
FLANGES
IMPORTANT
IMPORTANTE
5
STEP 4
Check Joint Interference Fit
FULL INTERFERENCE FIT
½
Socket
Depth
PIPE
Socket
Depth
Do not use components which improperly mate.
STEP 5
Apply Primer
THE MOST FREQUENT CAUSE OF JOINT FAILURES IS INADEQUATE
SOLVENT PENETRATION AND SOFTENING OF BONDING SURFACES
DURING THE WELDING OPERATION.
STEP 6
Apply Solvent Cement IMMEDIATELY
VALVE INSTALLATION CAUTION: TAKE EXTRA CARE THAT NO PRIMER
OR SOLVENT CEMENT IS ALLOWED TO CONTACT INTERNAL VALVE
COMPONENTS.
3
Use full faced, 1/8" thick gaskets of a material suitable for the intended
application having a Shore "A" durometer of approximately 60. Use of well
lubricated bolts and fl at washers is
required. Bolts must be tightened
in a 180° opposing pattern. The
recommended torques are 12 ft. lbs. for
Valve Size
1/2" - 1-1/2" sizes, 25 ft. lbs. for 2" - 4"
sizes and 40 ft. lbs. for 6" and 8" sizes.
1/2" to 1-1/2"
2" to 4"
6" Flange
8" Flange
PRECAUTIONS AND WARNINGS
FOR ALL VALVE INSTALLATIONS
CAUTION:
The system must be designed and installed so as not
to pull the valve in any direction. Pipe must be cut and installed in
such a manner as to avoid all stress loads associated with bending,
pulling, or shifting. Valve must be supported.
CAUTION:
BEFORE THE VALVE IS CYCLED, all dirt, sand, grit or
other material must be fl ushed from the system. This is to prevent
scarring of internal components; e.g., ball, cup, wedge, seats, etc.
WARNING:
SOME LUBRICANTS, INCLUDING VEGETABLE OILS,
ARE KNOWN TO CAUSE STRESS CRACKING IN THERMOPLASTIC
MATERIALS. A mild soap solution or commercially available pipe
gasket lubricant suitable for PVC and CPVC is recommended for use
where lubrication is needed for installation or maintenance service.
Choice of lubricant is at the discretion of the installer.
WARNING: Systems must not be operated or fl ushed out at
fl ow velocities greater than 5 feet per second.
WARNING:
ALL AIR MUST BE BLED FROM THE SYSTEM DURING INITIAL
FLUID FILL. 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 2012 Spears Manufacturing Company. All Rights Reserved.
®
Printed in the United States of America 03/13.
NET FIT
PIP P E E
Socket
Depth
BOLT TORQUES
Torque Value
12 ft. lbs.
25 ft. lbs.
40 ft. lbs.
40 ft. lbs.
GV-3A-1212