DIVISION 1 - GENERAL REQUIREMENTS - IDEAS-EC

2 .2 VALVESa. Solder: ASTM B32-96, 95-5 Tin-Antimony solder for above ground lines.b. Brazing: AWS A5.8-92, Classification BAg 1 (silver) where copper pipe isconnected to brass.3. Unions: ASME B16.22-95. Wrought copper solder joint, ground seat.4. Flanges: Class 125 cast bronze flanges.a. Bolts and Nuts: ASME B18.2.1-96, carbon steel square head machine bolts withgalvanized heavy hex nuts.b. Gaskets: ASME B16.21-92, nonmetallic, flat, 1/16-inch (2 mm), full faced, forwater service.5. Dielectric Unions: Threaded or soldered end connections for the pipe materials in whichinstalled. Constructed to isolate dissimilar metals, prevent galvanic action, and preventcorrosion.A. Gate Valves:1. 2-inch and smaller: Class 150, 300 psi ASTM B62-93 cast bronze body and union bonnet,solid bronze wedge, rising stem, integral seat, threaded ends, and aluminum or malleableironhandwheel.2. 2-1/2 inch and larger: Class 125, 200 psi, ASTM A126-95 cast-iron body and bonnet,solid cast-iron wedge, brass-alloy stem, outside screw and yoke, flanged end connectionsand cast-iron handwheel.B. Ball Valves: 2-inch and smaller: Class 150, 600-psi, ASTM B584-96 bronze body and bonnet,two-piece construction, chrome-plated brass ball, conventional port, bronze or brass stem, teflonseats and seals, threaded end connections, vinyl-covered steel handle and handle memory stop.C. Butterfly Valves: 2-1/2-inch and larger: 200 psi, ASTM A126-95 cast iron body and bonnet,stainless steel stem, field replaceable EPDM or Buna-N sleeve and stem seals, wafer, lug orgrooved style, nickel-plated ductile iron disc, lever operators with locks.D. Check Valves:1. Swing Check Valve: 2-1/2 Inch and Smaller: Class 150, 300-psi CWP, ASTM B62-93cast-bronze body and cap, horizontal swing, regrinding type, Y pattern, renewable bronzedisk. Threaded or soldered end connection.2. Wafer Check Valve: Class 125, 200-psi CWP, ASTM A126-95 cast iron body, bronzedisc/plates, stainless steel pins and springs, Buna N seals, installed between flanges.Valves designed to open and close at approximately one foot differential pressure.E. Balancing Valves: 125-psig working pressure, 250 degrees F maximum operating temperature,bronze body balance valves with connections for portable differential pressure meter. Meterconnections with integral check valves and seals, integral pointer and calibrated scale to registerdegree of valve opening. Threaded connections on valves 1-inch to 2-inches.15500-3HYDRONIC SYSTEMS