Spears SK-3A-0500 Información De Instalación

SWING CHECK VALVE
Installation Information
Read all applicable instructions and procedures thoroughly
before starting. Suitability of the intended service application
must be determined prior to installation.
"Material Considerations in Application and System Design",
in the Materials section of Spears
PRODUCT GUIDE & ENGINEERING SPECIFICATIONS, V-4, 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.
Swing Check Valves are designed for horizontal installations, but may be installed in up-fl ow
only vertical applications. Flanged ends are designed for connection to fl anges having an
ANSI Class 150 bolt pattern.
Caution: Valve must be installed with proper direction of fl ow. Do not install valve in upside
down position.
Required materials: 1/8" thick, full-faced gasket suitable for the intended application, having a
Shore-A durometer of approximately 60. Lubricated bolts, fl at washers, and nuts as required
for each end connection (see Bolt Specifi cation Table).
Step 1: Position and support valve with fl ow arrows in desired direction. Flanges must be
installed parallel face-to-face.
Step 2: With gaskets in place, install washers and lubricated bolts through mating fl ange
and gasket into fl ange of Swing Check Valve. Install washers and nuts from
valve-fl ange side of connection. Check alignment and make sure that the faces
of mating surfaces are fl ush against the gasket prior to bolting down.
Tighten nuts by hand until snug to hold assembly in place.
Step 3: Establish uniform pressure by tightening bolts to specifi cations in 5 ft-lb
increments using a 180° opposing sequence (see Bolt Specifi cation Table). Do
not use bolts to bring together improperly mated fl anges.
Step 4: Flush system and pressure test. Flanged connections may require additional
tightening to specifi cations after initial pressure test.
Bolt Specifi cation Table
Valve Size Flat Washers Bolts & Nuts
3/4" 8 4
1" 8 4
1-1/2" 8 4
2" 8 4
2-1/2" - 3" 8 4
4" 16 8
6" 16 8
8" 16 8
* = Bolt Length is based on mating Valve with Spears
SK-3A-0500
Please review
THERMOPLASTIC VALVE
®
Bolt Size Min. Length*
1/2 2
1/2 2-1/4
1/2 2-1/2
5/8 2-3/4
5/8 3
5/8 3
3/4 3-1/2
3/4 3-3/4
brand fl ange. Length may vary with use of other fl anges.
®
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.
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.
WARNING: Systems must not be operated or fl ushed out at fl ow velocities greater than
5 feet per second.
WARNING: NOT FOR DISTRIBUTION OF COMPRESSED AIR OR GAS
All air must be bled from the system during 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.
Torque
PACIFIC SOUTHWEST
12 ft-lbs
12 ft-lbs
12 ft-lbs
NORTHWEST
25 ft-lbs
25 ft-lbs
25 ft-lbs
40 ft-lbs
© Copyright 2007 Spears
40 ft-lbs
Printed in the United States of America 03/07.
SPEARS
®
®
ROCKY MOUNTAIN UTAH
SOUTH CENTRAL
NORTHEAST
Manufacturing Company. All Rights Reserved.
®
SOUTHEAST MIDWEST
FLORIDA INTERNATIONAL SALES
15853 Olden St.
SK-3A-0500