Hydraulics and pneumatics use fluids under pressure to generate, control and transmit energy. They can use a liquid, such as mineral oil or water (hydraulics) or a gas such as air or other gases (pneumatics).

As we know, these are transmission systems, also called fluid dynamics, composed of many elements that work together or in sequence to carry out an activity, such as pumps, pipes, valves, actuators and other components.

How to use adhesives and glues in hydraulics and pneumatics

Anaerobic Adhesives provide a series of very useful solutions in the installation and maintenance phases of hydraulic and pneumatic transmission systems. In particular, adhesives are especially used for the system of pipes and fittings that carry the high-pressure fluid through the system.

Adhesives and glues: main benefits

• They prevent oxidation and corrosion of the parts.
• High resistance to temperature, pressure, vibration, oils and chemicals.
• Excellent resistance to thermal and mechanical shocks.
• Customized solutions for particular designs and for different materials.
• Approvals according to international standards, i.e. DVGW, NSF, WRAS, TZW, BAM, GLOBAL MARK.

Adhesives and glues: main applications

• They seal and lock threaded joints and screws.
• They seal and act as a gasket for coupled flat surfaces.
• They lock the cylindrical couplings.
• They facilitate the coupling and positioning of the parts.

How to choose adhesives and glues in hydraulics and pneumatics
To make a correct choice of use, we recommend that you follow the manuals in your possession and the instructions for the individual products. In general, it is however possible to consider the following indications from the manufacturer.

Adhesives and glues: when to use threadsealing
Anaerobic threadsealing guarantee the tightness of gases, compressed air, water, hydrocarbon oils, LPG, CFC GAS and other chemical agents in hydraulic and pneumatic systems. These adhesives harden between the joint threads due to contact with the metal and the absence of oxygen. They are approved according to the regulations of various international bodies such as DVGW, AGA, WRAS, BAM, NSF. In some specific applications, they can replace hemp, green pulp, PTFE tape.

Adhesives and glues: when to use threadlocking
Anaerobic threadlocking are formulated to lock and brake threaded couplings such as bolts, nuts, studs, etc. They harden between the threads of the joint thanks to the contact with the metal and the absence of oxygen, forming a tough film that avoids spontaneous loosening of the parts, caused by vibrations, stress and thermal expansion-contractions. They are DVGW approved for use with gas according to EN 751-1 and comply with the UBA declaration.In some specific applications, they can replace classic washers, spring washers, rosettes and grovers.

Adhesives and glues: when to use Glues instead of Gaskets
Liquid sealants allow you to simply and effectively seal surfaces and flanged joints of pumps, gearboxes, differentials, regardless of the position (horizontal or vertical). They are available in different technologies: anaerobic, silicones, MS polymers. In some specific applications, they can replace classic gaskets (paper, cork, plastic materials, etc.).

Adhesives and glues: when to use retaining
The anaerobic retaining adhesives allow the high mechanical resistance assembly of cylindrical couplings such as bearings, gears, pulleys, pins, bushings, guaranteeing resistance to slipping and the transmission of high torques. They avoid the development of internal stresses in the material due to the forced assembly of the parts.

Adhesives and glues: when to use instant adhesives - Instant
Instant adhesive cyanoacrylates are designed for the instant and structural bonding of small components. They guarantee high performance on a wide variety of materials such as rubber, metals, plastics, wood, leather, ceramics and others, in the presence of limited clearances between the parts. Polymerization occurs at room temperature and is triggered by the humidity present in the environment and on the bonding surface.

Adhesives and glues: when to use two-component acrylic adhesives
Acrylic adhesives are tough two-component structural adhesives, highly resistant to peeling, impact and vibrations and suitable for bonding different types of materials such as steel, aluminium, metals (even if not perfectly degreased), magnets, ferrites, plastics and wood. They polymerize rapidly at room temperature as soon as the two components are brought into contact with each other and the development of resistance occurs in a short time. Designed to provide engineers and manufacturers with extreme flexibility when designing the bonding process. They guarantee long-lasting and resistant bonds even to chemical agents and high temperatures.

Adhesives and glues: when to use Two-part epoxy adhesives
Two-part epoxy resins are structural adhesives that offer excellent mechanical strength and durability, ideal for bonding metals, composites (CFRP, GFRP.), marble, stone and various plastics. They polymerize at room temperature following the careful mixing of the two components (resin and hardener) and are able to fill large gaps between the parts. They can replace mechanical fasteners helping to lighten the load structures, optimizing the distribution of loads and the absorption of impacts and vibrations.

Adhesives and glues: when to use surface conditioners
The surface treatment of substrates is a fundamental phase of the bonding process. Through cleaning and specific treatments, all types of contaminants present on the surface of the substrate are removed, allowing the adhesive to actually wet the material and not its apparent surface. This leads to maximizing the adhesion and durability of the joint thanks also to the creation of chemical and physical bonds between the adhesive and the substrate.

Conclusion. How to choose adhesives and glues in hydraulics and pneumatics
In conclusion, to make a correct choice of use, we recommend that you follow the manuals in your possession and the indications of the individual products, checking the suitability of the individual adhesive or glue in the specific application.