Injection Packers for Crack, Water Stop and Leak-Seal Injections

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3 March 2022 - 16:02, by , in Grouting and Injection, No comments

As the port of entry or filler neck for a large variety of injection resins and chemical grouts, injection packers connect the injection equipment (applicator and injection pump) with the structural substrate.

Steel, brass, zinc, aluminum/aluminum, and plastic are among the metals used for packaging.  For easy and secure connection to the applicator, many packers have either zerk fittings or button heads. For overhead, high pressure, and high volume applications, the button head type offers the most secure connection.

Conditions of the jobsite, environment and material determine the type and built of packer required to achieve the best injection results.

Injection Packers – Installation Types

Based on injection requirements and injection products used we distinguish between borehole packers and surface mount packers, also known as surface ports.

Typical applications of cylindrical borehole injection packers include polyurethane bases and other leak-sealing resins and foams. In wet or demanding conditions, borehole packers perform well. Further, we distinguish between mechanical packers with a tightening mechanism and hammer-in packers. In a drill hole, friction between the packer body and the substrate allows the seal of the packer to be achieved.

Ports mounted on the surface are mostly used for structural epoxy injections and where non-destructive injection (no drilling) is required. Surface ports or surface packers are glued to the substrate’s surface and rely on the strength of its adhesive.

Preparatory work

Step1 – Structure / Substrate / Product Analysis

  • Condition of structure, environment and climate
  • Chemical rout / resin specified
  • Injection pressures expected  (high pressure vs low pressure)

Step 2 – Packer Choice

  • Select suitable injection packers.

Installation

Installation procedures are determined by the conditions found on the jobsite.

The diameter of the drill holes is the same as the diameter of the mechanical packers and hammer-in packers, and the borehole depth varies depending on the conditions and requirements.

The typical angle at which drill holes are made is approximately 45 degrees.  The exact angle will depend on the thickness of the wall.  The boreholes must be cleaned completely of drill dust and debris.

Final work

  • Remove or knock-off the mechanical packers / hammer-in ports/surface packers as specified
  • Patch the drill holes with suitable mortar
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