Seals are used to prevent fluids from passing through a specific point, as well as to prevent air and dirt from entering the system where they are used. The increasing use of hydraulics and pneumatics in aircraft systems has created the need for washers and couplings with different features and designs to cope with the wide range of speed and performance variations to which they are subjected. There is no one-size-fits-all connection or type of connection.
Some reasons for this:
– Pressure at which the system operates
– Type of fluid used in the system
– Metal surfaces and clearances between adjacent parts
– Type of movement (rotational or translational) if any.
Seals are divided into three main categories: Seals (O-rings), Seals and Sealing rings.
Watertight Seals
Seals are made of synthetic or natural rubber, also Viton, Nitrile, or any other material. They are often used as “working seals”, i.e. in assemblies containing moving parts, such as transformers, pumps, multi-way valves, etc. Seals are manufactured in the form of O-rings, V-rings and U-rings, each of which is designed for a specific purpose.
