Manufacturas Oria SLU is a global company (member of Egaña Group) specialized in industrial air spring product design and manufacturing. Established in 1970, we rely on more than 50 years of manufacturing knowledge and experience, counting with advanced technologies and qualified personnel.
Air springs general information
The Oria bellow is a corrugated flexible body composed of high-quality materials. An inner and outer rubber cover with reinforcing fabric plies in between and steel beads are joined vulcanized together, producing single, double and triple convoluted bodies with central rings among convolutions.
The complete air spring is set up fitting the metallic end closures to the bellow ends, offering the following three design alternatives:
- Dismountable Design: Removable set assembled with two clamping bead rings and top and bottom plates, with an air inlet connection in the top plate and studs or threaded holes for fixation. Available in D Series air springs.
- Crimped Design: Not dismountable set assembled mechanically crimping top and bottom bead plates, with blind nuts for fixation and with an air inlet connection in the top plate. Available in F Series air springs.
- Bead Ring Design: Dismountable set assembled with socket head, threaded, or countersunk type bead rings. The scope of supply lacks of plates, so the air spring is directly assembled to the machine or the customer supplies the plates. Available in F Series air bellows.
The air bellow sealed with the metallic end closures are single-acting air containers that operate with air pressure, exerting internal force in the axial direction to produce an upward stroke, thrust and tension for actuator applications, or to provide a high-performance vibration isolation with more than 99% of isolation of unwanted vibrations.
The simplicity of its construction provides an extremely long, virtually maintenance-free service life even under harsh conditions, having available different rubber and metal materials to obtain the optimum performance of the Oria air bellow for your application, even working as an isolator or actuator.
Features of air springs as actuators
The air actuator has been developed to be used instead of traditional rigid actuators such as pneumatic or hydraulic cylinders. The air pressure inside the rubber air bellow creates an axial force that produces an elevation stroke, pushes, tensions and swivel and fast fixation movements, making the air springs (air actuators) the best substitutes for traditional cylinders.
If we compare the air actuator with the pneumatic cylinder, we have to outline that the air actuator has much lower purchasing and operational cost, a compact installation height, an extended product life, a guarantee of uniform movements without stick-slip effect, and a flexibility to operate with lateral movements up to 30 mm and a tilt motion up to 25º.
All this advantages, and many more that you can see here, with a wide air spring size range which covers dimensions from 120 to 950 mm with loads from 0,5 to 450 kN.
Features of air springs as isolators
Due to its extremely low natural frequency, air springs can be used instead of coil springs, rubber-metal dampers or other types of isolators. The rubber air springs can isolate a large percentage of the vibrations, being able to reduce more than 99% of the unwanted vibrations arising from most industrial applications.
The advantage of using the air spring isolator consists on obtaining the most effective reduction of all these vibrations, noise and shocks at the same time, extending the machinery life and obtaining a more comfortable workplace.
Furthermore, adding the advantage of having a compact installation height and its control for a uniform operation with alternating loads, uniform isolation properties, a size range to isolate loads up to 380 kN, and being suitable for use in harsh ambient conditions, makes the perfect product to achieve the optimal result of your application.
Here you can see all the advantages of air spring isolator.
Materials in the air springs industry
Standard rubber
It is the most widely used material in the air springs industry. Oria manufactures more than 100 models with this material.
Lowest temperature = -40ºC. Highest temperature = +70ºC.
Other compounds
ORIA also manufactures air springs for special applications. Almost 95% of all our range can be manufactured in the next materials:
- Butyl (IIR): material widely used in the industry due to its ozone and solar light endurance.
Lowest temperature = -25ºC. Highest temperature = +90ºC.
- Nitrile (NBR): material widely used in applications where oil can be found thanks to its excellent resistance to hydrocarbon oils and fuels, ozone and adverse weather conditions.
Lowest temperature = -25ºC. Highest temperature = +110ºC.
- Ethylene-propylene (EPDM): material with excellent resistance to high temperatures.
Lowest temperature = -20ºC. Highest temperature = +115ºC.
- Chloroprene (CR): material with excellent resistance to the sea water and medium resistance to acids.
Lowest temperature = -20ºC. Highest temperature = +110ºC.
Stainless steel
ORIA Air Springs can be provided with stainless steel closures and bead rings with the purpose of increasing their corrosion resistance. The most commonly used materials are: AISI 304 (DIN 1.4301) and AISI 316 (DIN 1.4401).
Application fields of the rubber air spring
The rubber air spring actuator can be applied in paper mills, cheese industry, wood pilling machines, agriculture machines, scissor lifts, vibrating table, compressors, screeners, delicate electronic equipment, ripper machines, mining construction areas, food industry, etc.
More information about the application fields is detailed in the following link: Application fields of the rubber air spring