Description The LEDE Model 1G ST (4-inch) is a precision-engineered rigid coupling designed to provide a secure, non-rotational connection between grooved-end pipes. Unlike flexible couplings, the Rigid 1G ST utilizes an “Angle-Pad” or “Tongue & Groove” mechanism that grips the pipe ends firmly, eliminating linear and angular movement at the joint. This coupling is essential for applications where pipe alignment must remain fixed, such as vertical risers, mechanical rooms, and valve stations. Manufactured from high-strength Ductile Iron (ASTM A536) and finished with a Red Fusion Bonded Epoxy (FBE) coating, it provides exceptional durability and corrosion resistance. The pressure-responsive EPDM gasket creates a bubble-tight seal under both internal pressure and vacuum conditions, ensuring the integrity of the fire suppression system. Key Features Zero-Movement Joint: Rigid design eliminates snaking, rotation, and angular displacement for stable pipe runs. 1G ST Design: Features a standard/single bolt-pad style that facilitates quick “metal-to-metal” contact installation. Resilient Gasket: Includes a high-grade, Grade E EPDM gasket suitable for hot and cold water services (-34?C to 110?C). High Strength: Cast from Ductile Iron (ASTM A536 65-45-12), offering superior performance over cast iron or steel. Fast Assembly: Requires only two bolts and a standard wrench for installation, making it significantly faster than welding or flanging. Certified Safety: Fully UL Listed and FM Approved, specifically rated for 300 PSI fire protection service. Technical Specifications Brand: LEDE Model Number: 1G ST (XGQT1-100) Nominal Size: 4 Inch / DN100 Pipe Outer Diameter: 114.3 mm (4.500 in) Working Pressure: 300 PSI (21 Bar) / PN16 Body Material: Ductile Iron ASTM A536 65-45-12 Gasket Material: EPDM (Grade E) Standard Bolt & Nut Size: 1/2″ x 2-3/4″ (M12 x 70mm) – Track Head Finish: Red Fusion Bonded Epoxy (FBE) Certifications: UL Listed, FM Approved, VdS
