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OC Sportsplex Pool HVAC Unit Replacement <br />PDC Project 23022 Hydronic Specialties 23 21 14 - 3 <br />10.Taco,Inc <br />11.Victaulic <br />12.Or Approved Equal <br />B.Size 2 inch and Smaller: <br />1.Provide ​globe​style with ​flow balancing​,shut-off capabilities,memory stops,and minimum of <br />two metering ports and ​female sweat,NPT threaded,press,or soldered​connections. <br />2.Metal construction materials consist of bronze. <br />3.Non-metal construction materials consist of Teflon or EPDM. <br />4.Maximum Service Operation: 300 psi at 250 degrees F. <br />C.Size 2-1/2 inch and Larger: <br />1.Provide ​globe or butterfly​style with ​flow balancing​,shut-off capabilities,memory stops,and <br />minimum of two metering ports and ​flanged or weld-end​connections. <br />2.Valve body construction materials consist of ​cast iron or ductile iron​. <br />3.Internal components construction materials consist of bronze. <br />4.Maximum Service Operation: 175 psi at 250 degrees F. <br />2.05 CALIBRATED BALANCING VALVES <br />A.Manufacturers: <br />1.Victaulic Company of America <br />2.Armstrong International <br />3.Tour &Anderson <br />4.Grinnell <br />B.All balancing valves shall be of globe style design to offer the widest range of adjustment accuracy <br />in the flow rate. All balancing valves must offer a minimum of 720 degrees rotation of the <br />handwheel for accurate adjustments and acceptable control range. <br />C.All balancing valves shall exhibit accuracy in flow measurement of +/-5%in the normal operating <br />range of the valve. <br />D.All balancing valves shall have provisions for measuring differential pressure from both sides of the <br />body,flow temperature,and flow rates. Also to include a 1/4”drain connection as an integral part <br />of the valve body. <br />E.All balancing valves must offer 100%positive,leakproof shutoff against the same fluid pressure as <br />the valve body pressure rating. <br />F.All balancing valves must offer a preset function with a locking device to prevent tampering and <br />allow return to the original balanced setting after shutoff. This feature shall be hidden within the <br />design of the valve. <br />G.All balancing valves 1/2”to 2”shall have a digital handwheel for display and presetting accuracy. <br /> A drain/fill connection with integral stop valve shall also be included on sizes up to 1-1/2” Sizes 2- <br />1/2”to 12”shall have a ring scale sleeve under the handwheel for reading. <br />H.All balancing valves in sizes 1/2”to 2”shall be shipped in a container which shall be used as <br />insulation after valve installation. The flame retardant insulation shall have an “R”value of 4.5 <br />minimum. <br />I.All balancing valves in sizes 1/2”to 2”shall be manufactured in such a way which does not require <br />dielectric fittings. Valves in sizes 2-1/2”to 12”shall be manufactured from ductile iron equivalent <br />to ASTM-A536,GR-65,and 4542. <br />J.For valves 1/2”NPT to 12”grooved ends or flanged,the nominal ratings shall be 250 psig at 230 <br />degrees F. <br />K.All balancing valves shall be sized so as to perform in a normal operating range of 50%to 100%of <br />full open position. <br />L.Provide a portable meter kit within a durable case. Meter to have dual 4-1/2”diameter gauges with <br />a range of 0-120 ft.w.g.differential. Accuracy to be +/-3.0%. Provide in kit with hoses. Meter to <br />become property of the Owner. <br />Docusign Envelope ID: D4F3B98E-0756-4A0C-A3AD-05AA32D39F1C