Overview
The Tuf-Lok® Ring Grip Pipe Coupling Series 688 and 698 is a robust, self-aligning, and self-grounded pipe coupling designed for heavy-duty applications. It facilitates quick installation and reinstallation, making it ideal for scenarios requiring frequent assembly and disassembly. The coupling ensures pipeline integrity without damaging the pipe ends.

Key Features

• Self-aligning and self-grounded
• High end pull capability
• Leakproof under high pressure and vacuum conditions
• Reusable and absorbs vibration
• Compatible with various metal pipes, including mild steel, stainless steel, and aluminum
• Externally leakproof and provides a smooth internal connection

Specifications
The coupling is available in different sizes, accommodating nominal pipe sizes from 2 inches (50 mm) to 10 inches (250 mm). It supports a maximum working pressure of 150 PSIG (10.34 barg) and varying end loads depending on the size.

Assembly Procedure

1. Place a Tuf-Lok coupling ring over each deburred pipe end.
2. Use nylon ring gauges to hold the coupling rings in place for correct welding position.
3. Tack weld the coupling ring between the ring gauges.
4. Remove the nylon ring gauges and continuously weld the ring on the pipe end side.
5. Lubricate the Tuf-Lok gasket with a soap solution for easy installation.
6. Position the rubber gasket on one pipe end and butt the pipe ends together.
7. Slip the Tuf-Lok cover over the rings and against the rubber gasket.
8. Position bonded metal tabs on the gasket between cover halves and tighten the covers evenly.

Options

• Covers available in mild steel, zinc plated, and stainless steel
• Rings available in mild steel, stainless steel, and aluminum
• Custom gaskets available in EPDM, Buna-N, Silicone, Fluoroelastomer, and others
• High temperature design up to 350°F (176°C)

Contact Information
TUF-LOK International, Madison, Wisconsin USA. Phone: 608.270.9478, Fax: 608.270.2080, Website: www.tuflok.com