| SealBoss is an industry leading supplier of packers and ports
Since 1988 we have been supplying companies worldwide with millions of packers of all sizes and shapes. Mechanical packers and injection ports are the gateway to successful injection. We strive to provide the most comprehensive packer selection in the industry. We maintain a very large inventory to meet customer preference, job requirements and to offer fastest delivery times. We offer mechanical packers varying in all key designs including Packer Material Type, Diameter, Length, and Ball & Valve Location.
In addition to our very large packer inventory we offer custom manufacturing for specialty designs, sizes, materials and one-off applications.
The Mechanical Packer and common variations
There are two primary categories of packers available. Insertable mechanical packers
and surface mounted ports.
Packer Materials & Types
Mechanical Packer Body Type
SealBoss mechanical packers are made from 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.
Premium mechanical packers feature a rubber sleeve with a threaded shaft. As the threaded shaft is tightened, the rubber sleeve is compressed, creating a compression seal inside the drill hole.
A medium soft, 'made to stick' rubber
that evenly expands diameter while compressed provides the best grip and highest possible injection pressures.
Steel
SealBoss offers many heavy-duty steel packer variations. Steel offers the most strength and good resistance to oxidizing components found in acrylate/acrylic gels. SealBoss offers a wide variety of steel packers to suit all injection needs. Most packers are equipped with a rubber sleeve, some have a larger washer on the top of the packer to assist in the installation.
Brass , Aluminum, Zinc
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
SealBoss Plastic packers come in many versions. Some permit low resistance, high volume product flow and very quick installation.
Zerk Fitting or Button Head / Button Top
Packers are often equipped with either a zerk fitting or a button head as connective mechanism.
The zerk type is most commonly used. It easily connects
and disconnects and works with medium to high injection pressures.
The button head type can be of advantage in high volume applications and
it offers a superior connection which is helpful for single operator injection, over head
and large applications.
The SealBoss 5/8” (16mm) 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
The SealBoss 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. These packers do away with the sleeve and compression sleeve mechanism as the plastic body of the packer itself 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.
Diameter, Length, Valves
Diameter
Packers are inserted into pre-drilled holes in a concrete or rock substrate at various diameters.
The size of the packer selected depends on the volume to be pumped, drill
depth, injection pressures to be applied, as well as cosmetic and other
considerations.
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 such as concrete substrates and seem to be the best compromise in strength and size
and can be called a standard.
Larger diameters are mostly utilized in rock and other natural structures as found in tunnel and mining applications.
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.
The size of the drill hole equals the diameter of the packer. We discuss diameters and drilling angles and techniques in detail in our 1-2-3 at 45 Degree Crack Injection TM Guideline.
Length
The shaft of the mechanical packer must be recessed into the drill hole deep enough to create an adequate compression seal in the substrate and to prevent spalling of the substrate during installation and injection. For a weak substrate and deteriorated concrete longer packers of 4” to 6” (10-15 cm)are recommended. During injection, the drill hole itself acts as a channel through which the product will travel. However, extended shaft length can be advantageous when the contractor is attempting to bridge a gap in the substrate. For such cases SealBoss provides special length packers to carry the material to a specific point within the substrate.
Low & High Pressure Valves
An anti-return ball valve that opens under pressure is found in most packers to prevent material back flow on disconnecting the pressure line.
Upon depressurizing, the ball valve closes, prohibiting injection resin to flow back from the port hole. The ball valve is either located on the top of the packer, in the base of the packer, or in the packer shaft of the plastic packer type to allow for maximum flow. In standard high pressure valves the ball is pressure loaded with a small spring. Low pressure valves omit the spring to permit lower injection pressures.
Top Mounted Valves
Top mounted valves include zerk-valves and button-head (button-top) valves. Button-head valves offer the most secure connection with minimal leakage. Some top-mounted zerks are supplied separately to observe port-to-port travel of injection grout during the injection process. Once material is leaking from the next packer(s), the contractor immediately installs the valve at that time.
Bottom Mounted Valves
Bottom or stem installed valves allow removal of the top portion of the packer early after injection while keeping the drill holes sealed for patching of the hole with the remainder of the packer in the substrate.
As a rule packers should not be removed before the injected product has fully cured.
Surface Ports
Surface ports are typically used for epoxy injection.
A surface port is a surface-mounted version of packer for lower injection pressures and circumstances where drilling into the substrate is not possible. Surface ports are commonly used for epoxy injection at relatively low injection pressures.
These ports are glued to the surface or glued inside a drill hole. Many surface ports have an open/valve free design to work with quick release connectors with a multiple port injection option. They are typically supplied with caps to prevent epoxy back flow. There are also surface ports with a zerk fitting for a very secure fit at higher injection pressures. We also offer corner ports for placement in 90 degree construction corners.
SealBoss ® Quality Packers
We generally recommend mechanical type packers for most jobs. Their design
can cope with most demands found at an injection job and the 'problem
rate' is very low - a packer for all conditions. If high product flow
at lower pressures is desired, the 5/8" button head packers achieve
good results. The 3/8 Hammer-In packer performs at low pressures in excellent
concrete. Precise round drill holes are important for a snug fit.
Always keep in mind that a strong and reliable fit of the packers is essential for the safety
of the technician and a key factor for successful injection work.
For specialty applications, we supply modified packer and port designs. Such as
surface ports
equipped with a zerk fitting to utilize single component injection systems for
small epoxy and polyurethane jobs, Injection Screws for the SealBoss
Injection Tube Systems for cold joints and other specialty packers.
SealBoss has been offering an industry leading selection of packers for over 30 years. Furthermore we provide all the required couplers, valves, hoses and pumps to complete a professional injection system.
We carry a very large inventory and strive to supply you with the most suitable product.
We also custom produce almost any design to meet our customers needs.
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(714) 662-4445
