Shurjoint 7707 Heavy Duty Flexible Grooved Coupling, Galvanized

Reliable Vibration Dampening and Corrosion Resistance for High-Pressure Systems

Shurjoint Model 7707 Heavy Duty Flexible Coupling is engineered for industrial piping systems where moderate to high-pressure performance is required. Made from durable ductile iron and finished with a hot-dipped zinc galvanized coating, this coupling provides enhanced corrosion resistance for demanding environments like data center infrastructure, wastewater treatment, and maritime services.

Its flexible design is purpose-built to maintain joint integrity by accommodating axial displacement, thermal expansion, and seismic tremors. By absorbing vibration and noise, the Model 7707 protects sensitive equipment and compensates for minor pipe misalignments or distortions in the layout.This coupling is equipped with a high-performance Grade E-pw EPDM gasket, making it an ideal solution for potable water, deionized water, and glycol-based cooling loops.

Key features:

• Performance: Rated for working pressures up to 1000 PSI (69 Bar) depending on pipe wall thickness
• Temperature Range: Operates effectively from -30°F to +230°F (-34°C to +110°C)
• Compliance: The EPDM gasket is approved under NSF/ANSI 61 and 372 for potable water
• Hardware: Heat-treated carbon manganese steel track bolts (ASTM A449) with minimum tensile strength of 110,000 PSI
• Warranty: 10-year limited warranty against manufacturing defects

Note: EPDM gaskets are not recommended for petroleum, mineral oils, or steam applications.

Specifications

• Heavy duty flexible coupling
• Hot dip zinc galvanized ductile iron
• Available in sizes 2 in. to 6 in.
• Max temperature range -30°F to 230°F (-34°C to 110°C)
• Grade E pw-EPDM gasket approved under NSF/ANSI 61 & 372- *EPDM seat for water services are not recommended for steam services unless valves or components are accessible for frequent replacement
• Max working pressure 1000 PSI
• Ductile Iron to ASTM A536, Gr. 65-45-12 and or ASTM A395, Gr.65-45-15, min. tensile strength 65,000 psi
• Heat treated carbon manganese steel track bolts to ASTM A449-83a, minimum tensile strength 110,000 PSI w/zinc electroplated heavy-duty hexagonal nuts to ASTMA563
• For potable water service to 180°F(82°C).
• Also good for services for water with acid, water with chlorine, deionized water, seawater and wastewater, dilute acids, oil-free air and many chemicals.
• Not recommended for petroleum oils, minerals oils, solvents and aromatic hydrocarbons.
• 10 Year limited warranty

Downloads

Product Manual (PDF Download)