Which injector/injector do I need?
The purpose of this article is to help you choose a packer suitable for your chemical injection project.
The injection packer is the connection between the injection pump and the structural elements for injecting various sealing chemicals, including epoxy resin (EP), polyurethane (PU/PUR/SPUR), polyurea, acrylic gel, water active Foam grouting, siloxane, siliconized products, microemulsion, grout, cement and mortar…
There are steel packers and aluminum packers on the market, but we decided to only produce plastic injection ports because they cover a wide range of applications and can withstand low and high pressures. In addition, plastic packaging machines are inexpensive, can quickly increase productivity on the job site, and are easy to discard after use (called “one-day packaging machines”). Last but not least, their lightness allows you to save on transportation costs.
What are the different types of injection packers (connection types)?
To fix the hose or spray gun on the injection packaging machine, the top may be:
Elbow accessories/with head/nipple grease nipple/molded round nipple
Button head/flat head
Pneumatic head/air plug
The most popular connector is the Zerk type, which can be widely used for injection equipment with 4 jaw connectors and its quick setup/disconnection connection.
The button on the top can be more securely connected to the port, thereby minimizing leakage issues and allowing technicians to stand on the side if the packer bursts during injection (if they leave the borehole).
What diameter packer should I use?
In most construction materials, the size of the drill hole is equal to the outer diameter of the mechanical packer: for a 12mm packer, please use a 12mm drill bit. However, if the building material is fragile, a smaller drill bit can be used.
Generally, larger packers have better grip and allow higher injection pressures, but larger boreholes can damage the structure.
The choice of the inner diameter of the packer depends on the volume to be pumped and the thickness of the injected chemical resin.
Are there injection ports of different lengths available?
Our inlet size varies from 15 mm to 80 mm.
In some applications, such as curtain injection, where the chemicals injected into the building should reach the other side of the structure, an extension rod can be installed at the bottom of the injection packaging machine. The rod can be cut according to your needs.
What is the purpose of the check valve? What is its position inside the injection packer?
Some injection ports do not have any check valves and can freely pass through mud, cement or mortar. To prevent backflow, a cover can be installed on the top of the packer.
Most of our plastic injection packers have a 3mm metal ball valve to prevent chemical substances from splashing backwards and force the injected material to remain and diffuse into the structure.
When two-stage injection is required in a structure with cavities, recesses and voids, the two systems can be mixed and used:
–Cement grouting is carried out through the Ø12mm grouting device without valve to strengthen the structure
– Insert a Ø 6.5 mm syringe into a Ø 12 mm syringe to provide a non-return system and inject your chemical resin under pressure.
In low-pressure injection packers, the check valve is located at the top because after injection, the packer is pushed into the borehole and remains in a structure hidden with a suitable sealant.
In fact, the high pressure port cannot be pushed further into the borehole after injection and the top must be cut. After the packer is cut off, the check valve is in the middle position, which can keep the check valve in the structure, so the injected material will not leak back.
Post time: Apr-20-2021