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piston for operating a valve seat arrangement. This switches the compressed air flow between several external connectors. The control piston may be pressurized for axial positioning by means of at least one electromagnetic pilot valve housed in a pilot valve housing. The pilot valve housing is detachably connected to the relay valve housing by means of a seal arrangement, which is embodied as an essentially annular combination seal element between the relay valve housing and the pilot valve housing with a seal section on the external radius for static sealing of the housing, and a seal section on the internal radius for dynamic sealing of the control piston.
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An injection-moulding machine has been developed that uses a seal on the stem of the valve pin to prevent leakage of molten material.
A metal edge seal ring is formed in a trench made up of a large number of short, connected legs arranged in a perpendicular fashion. Metal is deposited in the trench, and because the metal comprises many short segments, rather than several long, straight sections, the subsequent chemical-mechanical
Constant velocity joint having a non-rotating boot
Applicant: Mahle Metal Leve S/a, Brazil This patent describes a piston ring, particularly devised for use in internal combustion engines or compressors. It consists of a metallic base to which is applied -by physical vapour deposition -a coating of chromium nitride that has a periodicity (P), formed