1. Design Advantages • Lowest pressure drop compared to other check valve designs. • Can be installed in either vertical or horizontal piping system. • Minimal required back pressure to fully seat disc. • No metal internals to prevent the possibility of corrosion. • Full faced seat for drop tight shut-off. • Stainless steel external fasteners. • Easily modified for spring assist option. • Designed to fit between ANSI B16.5 Class 150 flanges. 2. Swing Check Valves ( 3/ 4" - 8" Flanged) Design Specifications Thermoplastic Swing Check Valves 3/ 4" -8" flanged design shall employ molded thermoplastic body, disc assembly, bonnet, and shaft. Metal internals are not acceptable. Valves have a full faced disc seal. Valves require low back pressure for drop-tight seating. Valves are of low pressure drop design. Body has a full open disc stop to prevent over travel and insure proper closing action. Bonnet is full gasketed and fastened using stainless steel hardware. Valves are top entry design for ease of maintenance. Valves are suitable for vertical and horizontal installation. Flanged ends are designed for installation between ANSI B16.5 Class 150 flanges. Materials of construction shall be as follows: ( select as required for service) * Body/ Bonet PVC, CPVC, ASTM D-1784 PP, ASTM D-4101 PVDF, ASTM D-3222 * Disc Assembly / Shaft PVC, CPVC, ASTM D-1784 PP, ASTM D-4101 PVDF, ASTM D-3222 For superior corrosion resistance and added tensile strength ~ Internals parts are PVDF * Seat/ Seal EPDM, Ethylene propylene diene monomer Fluorocarbon, Viton® ( DuPont Performance Elastomers) Fluorel ( 3M Corp.) PTFE ( Polytetrafluoroethylene) , Teflon® ( DuPont Performance Elastomers) NOTE: Can be easily modified for spring assist operation. * External Fastners 304 Stainless Steel * Flanged ANSI - B16.5 Class 150 .
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