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Shurjoint 7771 Tongue and Groove Ductile Iron Standard Rigid Coupling

The Shurjoint Model 7771 Standard Rigid Coupling is the ideal choice for risers, mechanical rooms or other applications where rigidity is required. The tongue and groove design and mechanisms provide a rigid connection to reduce and or eliminate flexural and torsional loads. The Model 7771 coupling sizes 1 1/2″ – 12″ (40mm – 300mm) are comprised of two identical housing segments. Sizes 14″-18″ (350mm – 400mm) are comprised of three identical segments. Sizes 20″ – 24″ (500mm – 600mm) are comprised of four identical segments. All include an EPDM rubber gasket, and plated track bolts and nuts. Housing segments are supplied with standard orange or RAL3000 red painted finishes. Optional finishes such as hot dipped zinc galvanized, and custom epoxy coatings are available.

Features

Housing: ductile iron to ASTM A536, Gr. 65-45-12 and/or to ASTM A395, Gr. 65-45-15, minimum tensile strength 65,000 psi (448 MPa)
Rubber Gasket: Grade E-pw EPDM (Color code: Double Green stripe), approved under NSF/ANSI 61 and NSF/ANSI 372 for potable water service to 180°F (+82°C)
Rubber gasket is also used for services for water with acid, water with chlorine, deionized water, seawater and waste water, dilute acids, oil-free air, and many chemicals
Surface finish: standard painted finishes in orange or RAL3000 red, hot dip zinc or colored epoxy coatings optional
Nuts and bolts: Heat treated carbon manganese steel track bolts to ASTM A449-83a (or A183 Gr. 2), minimum tensile strength 110,000 psi (758 MPa), zinc electroplated, with heavy-duty hexagonal nuts to ASTM A563
Type 304 or 316 track bolts with heavy-duty nuts (optional)