Finding the Suitable Injection Packer
Mechanical packers and injection ports are the gateway to successful injection. Le Fong offers a very large selection of injection packers. It can be a daunting task to choose a packer without prior experience. Below we briefly introduce different packer types and their features. We offer mechanical packers varying in all key designs including Packer Material Type, Diameter, Length, and Ball & Valve Location.
Packer Material Type
Mechanical Injection Packer Body
Mechanical packers are made from different material including steel, brass, aluminum, zinc, various metal alloys and plastic. There are important differences in design and functionality for a variety of products, substrates and objectives. Contractor preferences and comfort levels are also a deciding factor.
Steel Injection Packers
Steel offers the most strength and good resistance to oxidizing components found in acrylate/acrylic gels.
Brass , Aluminum, Zinc Injection Packers
Brass, aluminum & zinc packers are economical alternatives to steel packers with similar functionality. The overall strength is lower than steel, brass, zinc and aluminum packers bodies are softer. In some designs, the shaft can be broken off by hammer after injection thus leaving a flush surface. This is an advantage if removal of packer prior to patching is not specified.
Plastic Injection Packers
Some permit low resistance, high volume product flow and very quick installation.
Button Head / Button Top Injection Packers
Button Head packer offers high volume flow with a button head (button top) coupler to minimize leakage. Insert the plastic sleeve in the drill hole and thread the plastic packer into the sleeve for a compression fit via the hex button head. Anti return valve: A steel ball placed in the shaft of the packer prevents product back-flow.
Hammer-In / Bang-In Injection Packers
The Hammer-In port (Bang In Packer) is 3/8” (10mm) or 1/2” (13mm). The ports are inserted into the drill hole with the tap of a hammer. The plastic body of the packer creates a compression seal. The packers are set very quickly increasing productivity on the job site. Due to the lower friction fit, injection pressures are limited with this packer type.
Packer Construction Variations – Diameter, Length, Valves, Diameter
As a rule, and in addition to the packer material, a larger mechanical packer diameter permits higher injection pressures. 5/8” (16mm), ½” (13mm), 3/8” (10mm) and 1/4” (6mm) are most common diameters for man made structures, larger diameters are mostly utilized in rock and other natural structures. Caution: Packers and ports can exit the drill hole at high velocities under pressure. Correctly installed packers of the right dimensions will minimize this probability. In general, larger diameter packers prevent blow-out better than smaller packers.
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