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   PART 1 - GENERAL

    01 WORK INCLUDED

    A. Contractor shall provide all labor, materials, tools, and services required to install all valves in the HVAC Piping Systems, Including but not limited to Gate Valves, Globe Valves, Drain Valves, Ball Valves, Butterfly Valves, Check Valves and Plug Cocks.

    02 SUBMITTALS

    A. Submit manufacturers product data to Architect for approval in accordance with Section 15010.

   PART 2 - PRODUCTS

    03 MANUFACTURERS

    A. Provide products as manufactured by Crane, Powell, Jenkins, Lunkenheimer, Nibco or Walworth.

    04 GATE VALVES

    A. Packing: Select valves designed for repacking under pressure when fully opened, equipped with packing suitable for intended service. Select valves designed so back seating protects packing and stem threads from fluid when valve is fully opened, and equipped with gland follower.

    B. Comply with the following standards:

    1. Cast-Iron Valves: MSS SP-70.

    2. Bronze Valves: MSS SP-80.

    3. Steel Valves: ANSI B16.34.

    B. For HVAC Hot, Chilled and Condenser Water Service:

    1. Threaded Ends 2" and Smaller: Class 125, bronze body, union bonnet, rising stem, solid wedge.

    2. Flanged Ends 2-1/2" and Larger: Class 125, iron body bronze mounted, bolted bonnet, rising stem, OS&Y, solid wedge.

    C. For HVAC Water Service Exceeding 300 Feet Static Head:

    1. Threaded Ends 2" and Smaller: Class 300, bronze body, union bonnet.

    2. Flanged Ends 2-1/2" and Larger: Class 300, steel body, bolted bonnet.

    2.02 GLOBE VALVES

    A. Packing: Select valves designed for repacking under pressure when fully opened, equipped with packing suitable for intended service. Select valves designed so back seating protects packing and stem threads from fluid when valve is fully opened, and equipped with gland follower.

    B. Composition Discs: Where required, provide suitable material for intended service. For stem throttling service, fit composition disc valve with throttling nut. For metal seated globe valves, provide hardened stainless steel disc and seat ring.

    C. Comply with the following standards:

    1. Cast-Iron Valves: MSS SP-85.

    2. Bronze Valves: MSS SP-80.

    3. Steel Valves: ANSI B16.34.

    D. For HVAC Hot, Chilled and Condenser Water Service:

    1. Threaded Ends 2" and Smaller: Class 150, bronze body, union bonnet, rising stem, composition disc.

    2. Flanged Ends 2-1/2" and Larger: Class 125, iron body, bolted bonnet, rising stem, OS&Y, renewable seat and disc.

    2.03 DRAIN VALVES

    A. For Low Pressure Drainage Service:

    1. Threaded Ends 2" and Smaller: Class 125, bronze body, screwed bonnet, rising stem, composition disc, 3/4" hose outlet connection.

    2. Soldered Ends 2" and Smaller: Class 125, bronze body, screwed bonnet, rising stem, composition disc, 3/4" hose outlet connection.

    2.04 BALL VALVES

    A. General: Select with port area equal to or greater than connecting pipe area, include seat ring designed to hold sealing material.

    B. Comply with the following standards:

    1. Cast-Iron Valves: MSS SP-72.

    2. Steel Valves: ANSI B16.34.

    C. For HVAC Hot and Chilled Water Service:

    1. Threaded Ends 2" and Smaller: Class 125, bronze 2 piece body, bronze ball, bronze stem.

    2. Soldered Ends 2" and Smaller: Class 125, bronze 2 piece body, bronze ball, bronze stem.

    2.05 BUTTERFLY VALVES

    A. General: Comply with MSS SP-67. Where butterfly valves are used as shutoffs for terminal or equipment removal or repair, select lug type valves. Select wafer type valves for other applications. Provide gear operators on butterfly valves 4" and larger.

    B. For HVAC Hot and Chilled Water Service:

    1. Lug Type 2" and Larger: Class 150, ductile iron body, lever operated, cadmium plated ductile iron disc, Type 410 stainless steel stem, EPT seat.

    2.06 SWING CHECK VALVES

    A. General: Construct pressure containing parts of valves as follows:

    1. Bronze Valves, 125 or 150 psi: ASTM B 62.

    2. Metallic Seated Bronze Valves, 200 or 300 psi: ASTM B 61.

    3. Iron Body Valves: ASTM A 126, Grade B.

    B. Comply with the following standards for design, workmanship, material and testing:

    1. Cast-Iron Valves: MSS SP-71

    2. Bronze Valves: MSS SP-80

    3. Steel Valves: ANSI B16.34

    C. Construct valves of pressure castings free of any impregnating materials.

    D. Construct valves of bronze, regrinding, with seating angle 40 degrees to 45 degrees, unless composition disc is specified.

    E. Provide stop plug as renewable stop for disc hanger, unless otherwise specified.

    F. Construct disc and hanger as separate parts, with disc free to rotate.

    G. Support hanger pins on both ends by removable side plugs.

    H. For HVAC Hot and Chilled Water Service:

    1. Threaded Ends 2" and Smaller: Class 125, bronze body, screwed cap, horizontal swing, bronze disc.

    2. Flanged Ends 2-1/2" and Larger: Class 125, iron body bronze mounted, bolted cap, horizontal swing, cast-iron disc.

   PART 3 - EXECUTION

    05 INSTALLATION

    A. General: Except as otherwise indicated, comply with the following requirements.

    1. Install valves where required for proper operation of piping and equipment, including valves in branch lines where necessary to isolate sections of piping. Locate valves so as to be accessible and so that separate support can be provided when necessary.

    2. Install valves when stems pointed up, in vertical position where possible, but in no case with stems pointed downward for horizontal plane unless unavoidable. Install valve drains with hose-end adapter for each valve that must be installed with stem below horizontal plane.

    B. Insulation: Where insulation is indicated, install extended-stem valves, arranged in proper manner to receive insulation.

    C. Mechanical Actuators: Install mechanical actuators with chain operators where indicated, and where valves 4" and larger are mounted more than 7'-0" above floor in mechanical rooms, boiler rooms; and where recommended by valve manufacturer because of valve size, pressure differential or other operating condition making manual operation difficult. Extend chain to about 5'-0" above floor and hook to clips to clear aisle passage.

    D. Valve System: Select and install valves with outside screw and yoke stems, except provide inside screw non-rising stem valves where headroom prevents full opening of OS&Y valves.

    E. Non-Metallic Disc: Limit selection and installation of valves with non-metallic discs to locations indicated and where foreign material in piping system can be expected to prevent tight shutoff of metal seated valves.

    F. Renewable Seats: Select and install valves with renewable seats, except where otherwise indicated.

    G. Fluid Control: Except as otherwise indicated, install gate, ball, globe, and butterfly valves to comply with ANSI B31.9. Where throttling is indicated or recognized as principal reason for valve, install globe or butterfly valves.

    H. Swing Check Valves: Install in horizontal position with hinge pin horizontally perpendicular to center line of pipe. Install for proper direction of flow.

    I. Wafer Check Valves: Install between 2 flanges in horizontal or vertical position, position for proper direction of flow.

    J. Horizontal Lift Check Valve: Install in horizontal piping line with stem vertically upward, position for proper direction of flow.

    K. Spring Loaded Horizontal Lift Check Valve: Install in horizontal piping line with stem vertically upward, position for proper direction of flow.

    L. Sizes: Unless otherwise indicated, provide valves of same size as upstream pipe size.

    M. Operators: Provide handwheels, fastened to valve stem, for valves other than quarter-turn. Provide lever handle for quarter-turn valves, 6" and smaller, other than plug valves. Provide one wrench for every 10 plug valves. Provide gear operators for quarter-turn valves 8" and larger.

    06 ADJUSTING AND CLEANING

    A. Valve Adjustment: After piping systems have been tested and put into service, but before final testing, adjusting, and balancing, inspect each valve for possible leaks. Adjust or replace packing to stop leaks, replace valve if leak persists.

    B. Valve Identification: Tag each valve in accordance with Division-15 section "Mechanical Identification".

    C. Cleaning: Clean factory-finished surfaces. Repair any marred or scratched surfaces with manufacturer's touch-up paint.

   END OF SECTION