A hydraulic machine has a first assembly and a second assembly movable in rotation relative to each other along an axis of rotation. The hydraulic machine has a crankcase defining an internal volume, in which an interface between the fixed assembly and the movable assembly has a housing provided with a first sealing element ensuring the sealing of the internal volume relative to the external environment. A second sealing element is positioned between the internal volume and the housing. The second sealing element is adapted to allow a passage of fluid from the internal volume to the housing when the pressure deviation between the internal volume and the housing is less than or equal to a threshold value, and to isolate the housing from the internal volume when the pressure deviation is greater than the threshold value.

A double sealing device for a rotating shaft comprising a first and a second seal of annular form mounted side by side in a peripheral groove formed in a wall of a circular cylindrical housing through which the shaft to be sealed passes. At least one of a discharge or vent channel opens into the peripheral groove between the two seals. The seals comprise a carrier ring with an outer axial flange and an inner radial flange, and a sealing washer applied to each carrier ring to cover a part of an outer face of the axial flange. A sealing lip bearing is formed slidably on the shaft, the first seal sealing a first fluid medium and the second seal sealing a second fluid medium. The axial flange has an extension forming a pierced structure, not covered by the sealing washer of the seal, and disposed facing the peripheral groove.

An integrated seal backup system includes a guiding mandrel; opposing taper elements; a deformable element positioned around the mandrel and between the taper elements; opposing sets of rings adjacent the deformable element, each set having an inner solid ring having an outer diameter smaller than an inside diameter of the tubular to be sealed and at least one backup ring having an inner taper matching the taper element and adapted to fracture in a pre-determined location in response to a diameter expanding force.

A method for assembling a seal cartridge and a seal cartridge, wherein the seal cartridge includes a set of sealing components configured for being removably assembled to each other so as to form the seal cartridge and wherein at least one of said sealing components is configured for being secured to another sealing component and/or to a shaft casing by a tenon and mortise joint system.

In accordance with the resent invention, there is provided a fugitive emission detection system for use in conjunction with a valve having a packing deign which includes a primary packing and a secondary packing. The valve further includes a leak port which is disposed within the valve bonnet between the primary and secondary packings. The detection system is operative to maintain the leak port in a normally open state. As a result, any fluid leakage past the primary packing is normally sent to the detection system, as opposed to being applied to and thus pressurizing the secondary packing. In the event of that a prescribed level of fluid leakage beyond the primary packing is detected, the leak port will be closed. The closure of the leak port facilitates the pressurization of the secondary packing.

A multi-part sealing system is provided for a housing of a motor vehicle control unit. The housing includes a first housing part and at least one additional housing part, with at least one electronic component in the interior of the housing and at least one conducting structure which leads out of the interior of the housing and connects an electronic component in the interior of the housing to components outside the housing in an electrically conductive manner. At least one housing part has at least one device for accommodating at least one part of the multi-part sealing system. A first part of the sealing system is suitable for preventing liquid harmful or noxious substances from penetrating into the interior of the housing and additional parts of the sealing system are suitable for preventing gaseous harmful or noxious substances from penetrating into the interior of the housing.

A gasket for an interface between a light emitting diode (LED) and a light emitting panel (LEP) includes a first segment and a second segment. The gasket also includes a first blade extending out from a surface of the first segment and a second blade extending out from a surface of the second segment. The surface of the first segment faces the surface of the second segment.

The invention relates to a shaft seal arrangement, comprising a first seal, a second seal and a third seal which are arranged in series between a product side to be sealed and an atmosphere side, wherein the second seal is arranged between the first seal and the third seal, wherein a first pressure is present in a space adjacent to the second seal in the direction towards the product side, and a second pressure is present in a space adjacent to the second seal in the direction towards the atmosphere side, wherein the space that is adjacent to the atmosphere side is connected to a pressure supply line via which a pressure medium can be supplied into the space, and wherein the first pressure is equal or substantially equal to the second pressure, so that the second seal can be operated with a pressure difference of zero between the first pressure and the second pressure.

An agitator shaft seal assembly for use on industrial mixers, particularly horizontal dough mixers, that includes a stator plate that is adapted to be mounted on a rotary seal adapter plate; a rotor mounted on the stator plate; a push ring mounted on the rotor; a seal gland disposed between the rotor and the push ring; and a locking ring mounted on the push ring.

A polished rod sealing device for an oil pumping machine includes a built-in stuffing box. The built-in stuffing box is arranged inside oil pipe enlargement press cap and can seal the polished rod of the oil pumping machine. The sealing device maintains dynamic coaxiality between the polished rod and the stuffing box, and reduces eccentric wear of the sealing packing resulted from the polished rod. The sealing device also provides lubrication between the polished rod and the sealing packing.