Conventional fasteners, such as nuts, bolts, rivets, and screws, are relatively efficient at mounting a broad range of items to surfaces, or surfaces to each other. However, in some industrial applications, regular fastening is not enough to prevent the unintentional and unwanted flow of potentially damaging liquids and gases.
Fasteners integrated with embedded O-rings compress when torqued. This compression causes the elastomeric (typically silicone rubber) O-ring material to distort and form an effective seal between the mating surfaces.
In fasteners subjected to internal or external pressures and excessive vibrations, the thread and bearing faces can act as ideal pathways for the seepage of fluids. Selecting the right sealing hardware is, therefore, essential to ensure that electronic, hydraulic and pneumatic systems operate at maximum efficiency.
Improper sealing can result in unwanted leaks and loss of pressure in some applications. This can lead to equipment damage, inefficient processes, and cross-contamination which can ultimately lead to reduced productivity, operational downtime, and expensive maintenance or repair operations.
Chemical processing industries, in particular, rely on sealing hardware to prevent the leakage of potentially hazardous gases and liquids. Other sectors, such as the petrochemical industry, require reliable sealing fasteners to contain flammable substances and mitigate the risk of ignition or explosion.
Sealing hardware technology is used in a variety of machinery applications, particularly in harsh or hazardous environments. Sealing hardware ensures that a proper 360° seal is achieved around the base of the fastener through the compressive action of the O-ring. This attribute makes sealing hardware ideal for various hydraulic and pneumatic systems, including:
A major advantage of sealing hardware compared to traditional sealants (such as deformable washers and liquid thread sealers) is its reusability. This means that sealing hardware products can be easily removed and reapplied with the same sealing pressure when torqued.
In APM Hexseal’s sealing hardware, the silicone rubber is positioned within an asymmetrical groove which requires minimum compression and deformation when the desired torque is applied. This results in a reliable 360° metal-to-metal fastener contact and minimum friction even over multiple reinstallations.
The silicone rubber sealing material is also resistant to myriad aggressive chemical compounds, making APM Hexseal’s fastener solutions capable of operating in harsh environments without the risk of seal degradation. For additional vibrational resistance, self-sealing fasteners may be integrated with locking features, including self-locking pellets, strips, and patches.
APM Hexseal offers numerous types of sealing hardware for almost any metal-to-metal fastening and sealing needs. Our range of sealing hardware can achieve pressure seal ratings of up to 20,000 psi. These products include:
APM Hexseal’s range of sealing hardware is designed to meet the needs of any metal fastening application. Our engineers can also customize products for more unique sealing requirements. If you are interested in increasing the longevity of your equipment with effective sealing solutions, feel free to contact us or request a quote today.