An Ermeto Fitting is an industrial pipe or tube fitting used globally. Fittings of this type are ideal for high-pressure pneumatic and hydraulic applications. It offers good corrosion resistance, stability, improved durability, excellent construction, and high-temperature tolerance.
Ermeto created and patented this fitting in Germany in the early 1930s. The nut, a cutting ring, and the body are the three main components of an Ermeto fitting. To be useful for high-operating pressure systems, the ring’s two cutting edges carve into the tubing’s outer surface when assembled, ensuring proper sealing and holding. The ring’s dual cutting edges make sure that the tube is double-stapled.
Ermeto Fittings are extremely popular because of their straightforward construction, which can be completed with just two wrenches and doesn’t require welding, tapping, or flaring. This “maximum simplicity” design is what gives the fittings their name.
Tightening the nut causes the ring to deform by the bore of the 24 degree cone and bite into the steel tube, creating deep cuts that guarantee a perfect seal and balance of the whole ring, thus eliminating vibrations.
In order to provide a reliable, leak-proof connection, Ermeto Tube Fittings are made with three precision-machined components: the body, the ferrule, and the nut. To provide leak-tight connections in a wide range of applications, the single ferrule design accounts for the variation in tubing materials, hardness, and thickness of the tube wall through the spring-like action of the ferrule during make-up.
Advantages and Benefits of Ermeto Fittings
Durability: Despite years of operation under extreme conditions, the elastomeric seal does not require retightening.
Reliability: Millions of fittings are reliable and in operation in situations like Mobile Construction, without military issue apparatus, stationary machinery, hydraulic presses, plastic injection moulding machines, ships, submarines, trains, and offshore exploration apparatus.
Reusability: Fittings can be taken apart and put back together numerous times. There the weak inner cone has not gotten wider or worn down.
Seals that are damaged can be easily replaced.
Maintenance: A set of wrenches is needed to maintain and replace ermeto fittings. To an existing assembly, extra in-line parts can be quickly added, such as test points (GMA), ball valves (KH), or Tee-fittings.