A metal sealing ring (1) for forming a metal-to-metal seal between two opposing metal surfaces. The metal sealing ring (1) comprises a tubular metal body (3) and an inlet tube (7) extending from the body (3) for introducing an internal pressure into the body (3). The body is adapted to deform under the internal pressure against each of the opposing metal surfaces to form the seal (1).

A node may be additively manufactured. The node may include a first surface and a second surface, and the second surface may bound a recess of the node. A structure may be inserted into the recess. A sealing member extend away from the second surface and contact the structure, such that a sealed space may be created between the node and the structure. An adhesive may be applied in the sealed space to at least partially attach the structure to the node.

A system includes a pressure ring positioned to abut a fluid end face, the pressure ring having a pressure ring bore with a diameter larger than a fluid end bore diameter. The system also includes an adjacent ring coupled to a fluid end, the pressure ring positioned between the adjacent ring and the fluid end face. The system further includes a face seal positioned at an interface of the pressure ring and the fluid end face, the face seal containing pressurized fluid associated with the fluid end. The system also includes packing material positioned within at least a portion of the pressure ring bore.

Embodiments of the present disclosure are directed toward a sealing system for a motor that includes a first sealing element configured to be circumferentially disposed around a rotor shaft of the motor. The sealing system also includes a second sealing element configured to be circumferentially disposed around the rotor shaft. A sealing tip of the first sealing element is configured to lift from a surface of the rotor shaft in response to a pressurized fluid directed between the first sealing element and the second sealing element. Additionally, the first sealing element and the second sealing element are configured to radially float around the rotor shaft.

An elevator car, an elevator car door and an elevator system. The elevator car includes an elevator car door and a jamb, the elevator car door having a gap communicating with an exterior of the elevator car when in a closed state, wherein the elevator car further comprises a fire-proof seal disposed on the elevator car door and/or the jamb, and intumescing to at least partially fill the gap when the temperature of an environment in which the fire-proof seal is located exceeds a preset value.

An elevator car, an elevator car door and an elevator system. The elevator car includes an elevator car door and a jamb, the elevator car door having a gap communicating with an exterior of the elevator car when in a closed state, wherein the elevator car further comprises a fire-proof seal disposed on the elevator car door and/or the jamb, and intumescing to at least partially fill the gap when the temperature of an environment in which the fire-proof seal is located exceeds a preset value.

A transboundary-area water-body monitoring and early warning system includes a monitoring device placed in water body to monitor the water body. The monitoring device comprises a housing body. A control mechanism, a communication mechanism, a sensor and a power box are arranged within the housing body. Power ends of the control mechanism, of the sensor, and of the communication mechanism are electrically connected to an output end of the power box. Control terminals of the communication mechanism and of the sensor are electrically connected to a control terminal of the control mechanism. The control mechanism is configured to receive a signal sent by the sensor, and send the signal from the sensor to a background computer through the communication mechanism. The housing body comprises a lower housing and an upper housing. The lower housing is sealably connected to the upper housing.

Embodiments of the invention provide a knife gate valve for flow along a flow path. The knife gate valve can include a body structure that includes a gate passage, a gate disposed to move within the gate passage between open and closed positions to selectively open or close a fluid aperture, and a gate seat configured to engage a free end and lateral edges of the gate. A transverse element can be formed from resilient material and can extend laterally across the gate passage to form a seal with a first side of the gate and with the gate seat.

There is disclosed a packer and/or gripper element (10), beneficially for use offshore and/or underwater, the packer and/or gripper (10) comprising an inflatable element or cushion (15a, 15b, 15c, 15d), wherein a periphery of the/each inflatable element or cushion (15a, 15b, 15c, 15d) comprises at least one corner, the at least one corner comprising a concave portion (30a, 30b, 30c, 30d). The disclosed packer and/or gripper element (10) comprises a plurality of inflatable elements (15a, 15b, 15c, 15d), each inflatable element (15a, 15b, 15c, 15d) being communicably coupled to an adjacent inflatable element (15a, 15b, 15c, 15d) by a port (155a, 155b) disposed between the inflatable elements (15a, 15b, 15c, 15d).

The invention relates to a turbine assembly (1) comprising an annular structure extending circumferentially about an axial direction (DA) and comprising ring segments (10) arranged circumferentially end to end and comprising adjacent connection faces (13a), linked by linked by sealing tabs (21, 22) in the wall (11) and in the flange (12). The invention is characterised in that the grooves (31, 32) and tabs (21, 22) are curved, the tabs (21, 22) having a bending degree of freedom starting from their mounting position in the presence of an air pressure exerted from upstream to downstream between the adjacent connection faces (13a, 13b) of the at least two adjacent ring sectors (10) during operation of the turbine, the tab (22) having a second point (220) which is in contact with a point (213) of the tab (21).