Spears GV-3A-1006 Manual Del Usuario

GATE & PLUG GATE VALVES
Installation Information
These instructions apply to all Spears
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, 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
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 the Solvent Cementing, Threading or
Flanging procedures listed on the following
pages.
Repeat Step 1 to attach opposite
STEP 3
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.
GV-3A-1006
®
Regular and Plug Gate Valves.
' THERMOPLASTIC
®
1
SOLVENT CEMENT WELDED JOINTS
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
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 - Pipe ends must be cut square, using a
wheel-type cutter or saw & miter box. A fi ne-toothed hand saw (16-18 teeth/
inch) with little or no set is recommended. A power cut-off saw with carbide
blade is recommended for high volume cutting.
STEP 2 Deburr & Bevel Pipe - Regardless of cutting method used in
Step 1, burrs are created which must be removed from both the pipe I.D. and
O.D before joining. All pipe ends must be beveled 10° to 15°. Commercially
available deburring & beveling tool is recommended, or a mill fi le may be
used.
Deburr Bevel
2