PPM Double Seal Pipe Purging System - to 330°C (Pipe I/D 16-320mm)

PPM Double Seal Pipe Purging System to 330°C (Sizes 16mm – 320mm) – Supplied with Rigid Connector as Standard

Purge pipes fast with minimal gas usage.

The Silicone Double Seal purging system has been designed to further reduce both inert gas use and purging time. These systems use silicon discs to form an air tight seal, reducing purge times and gas usage for maximum efficiency.

There are 2 styles of silicon double seal systems available:

1. Gas Finger system – designed for small pipes and tubes from 16 – 38mm i/d
2. Double Seal systems – made for pipes from 1 1/2″ to 12″

Features and Advantages

• Typical purge times of less than 2 minutes (e.g. an 8″ pipe will purge to below 0.01% oxygen in less than 2 minutes)
• High quality silicon sealing disks that prevent them tilting or falling over inside the pipe
• Guaranteed gas tight seal
• UV and temperature resistant up to 330°C continuously or 450°C for short periods
• Suitable for purging pipes, elbows and fittings
• The silicon seal units can be separated and used as a gas finger and pipe stopper respectively
• Single Gas Finger for smaller pipes and tubes
• Shown with flexible hose connection for purging elbows and fittings
• Available in 3 x kit form (DSK16-165/16-220 and 16-320mm)

How It Works

The gas inlet and outlet are provided with twin sealing discs separated by a flexible, rigid or spring-type tube. The design guarantees that at least one disc will always remain tight to the pipe wall, creating a 100% seal. The discs are UV and temperature-resistant up to 330°C for up to one hour.

The gas is diffused into the chamber via the built-in sintered diffuser and exits through the exhaust holes in the secondary twin disc unit. This process of gas diffusion provides an even flow of gas and prevents any gas turbulence behind the weld, thereby minimizing the risk of oxygen in the welding chamber while achieving an extremely short purge time. These extremely short purge times result in valuable cost savings in gas and time.

Besides the very short purging time, the Silicon Seal System also offers the possibility to cover various nominal pipe diameters by one pair of baffles, enabling highly economic use of the device.

The double seal system can be purchased individually or in kit form for a range of pipe diameters. Gas inlet push fitting universal on all sizes. Supplied with a carabiner and insulated withdrawal cable for sizes 38mm upwards for ease of withdrawal from the pipe.