Vulco Sa.

Weir Vulco, S.a.

Weir Slurry Group, Inc.

Ricardo Abarca Melo

Rodrigo Guzman Castro

Osvaldo Quiroz Venegas

Jaime Ramirez Toledo

Wilfredo San Martin Cisterna

Ricardo Fernandez Daberti

Ronald J Bourgeois

Aleksander S Roudnev

Ricardo Fernandez Doberti

A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device comprises one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.

Mechanical seal

Mechanical seals, seal assemblies and pumps are disclosed. A mechanical seal includes a sealing member and a mount that forms part of a mounting assembly to mount the sealing member to a support structure of the seal. In an embodiment, the mount forms part of a seal assembly and is an elastomeric ring bonded to the sealing member.

Mechanical seal with improved seal assembly

A mechanical seal is disclosed that has first and second sealing faces that are urged into contact to form a seal therebetween. One sealing face is mounted on a rotatable portion of the seal and the second sealing face is mounted on a support assembly. The joint further includes a joint permitting rotary movement between the support assembly and a stationary portion of the seal to allow adjustment of the portion of the rotatable portion relative to the stationary portion without affecting the alignment of the first and second sealing faces.

Adjustable mechanical seal

Apparatus () for enabling a coating to be applied to an internal surface of a pipe elbow or bend C comprises a flexible body () adapted for location to extend within the pipe elbow or bend, and a bendable core () extending through the body. Bending of the core causes the flexible body to be bent in a similar manner. A method for applying the coating to the internal surface of the pipe elbow or bend (C) comprises the steps of shaping the flexible body () and locating it to extend within the pipe elbow or bend, and introducing a coating material so as to flow around and into a space defined between the flexible body and the internal surface of the elbow or bend.

Pipe coating

A method of manufacturing a mandrel for use in the internal coating of a pipe elbow or bend comprises the steps of: (i) adjustably positioning a bendable elongate member in a hollow template for the pipe elbow or bend, whereby the elongate member is bent so as to extend generally centrally through the template; and (ii) introducing a flexible material into, and allowing the material to cure in a space between the elongate member and an internal surface of the template.

Method for manufacturing a mandrel

A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device includes one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.

A method for enabling a lining () to be applied to a pipe elbow or bend C comprises the steps of connecting a tie member () to an end of a flexible elongate mandrel (), drawing the tie member through the elbow or bend so as to draw the mandrel therethrough and locate opposing ends of the mandrel adjacent to opposing respective ends of the elbow or bend, and securing the mandrel ends in relation to the respective ends of the elbow or bend. The mandrel can be adapted to the elbow or bend by locating the elbow or bend in a given orientation and deriving a profile S of the elbow or bend while in that orientation, removing the elbow or bend and then locating the mandrel in the given orientation, and adjusting the mandrel in relation to the profile of the elbow or bend to adapt it thereto.

Method for lining a pipe or elbow

A cushioning element suitable for use in a liner assembly for a grinding mill, the liner assembly including a mounting element having a recess therein, the cushioning element being located within the recess, and a wear element operatively connected to the cushioning element, the cushioning element including a cushion body of elastomeric material including a side section and opposed end sections, a plurality of cavities within the cushion body and extending from at least one of the end sections towards the other end section.

Cushioning element for mill liner

An impeller fixing mechanism is provided in a centrifugal pump for immobilizing the impeller, relative to the pump shaft and drive shaft of the pump, while effecting repairs to the pump, thereby eliminating much of the labor-intensive need for realigning the pump shaft and drive shaft and assuring accurate positioning of the impeller relative to the pump shaft. A method for effecting repairs of centrifugal pumps employs use of the impeller fixing mechanism of the invention to immobilize the impeller relative to the pump shaft, thereby facilitating the repair.

Pump wet end replacement method and impeller fixing mechanism

A liner assembly for use in a grinding mill, the liner assembly including a liner body including a mounting member, and an elastomeric cushioning member operatively connected to the mounting member. The cushioning member includes a plurality of support cavities therein, and a plurality of wear elements mounted within the support cavities.

Mill liner assembly

A selectively configured volute for incorporation into a centrifugal pump of the volute type is disclosed for use in processing heavy duty slurries that are characterized by containing particularly large and/or abrasive particulates that are known to degrade the pump casing or pump casing liner. The configured volute of the present invention is particularly suitable for use in connection with the use of an impeller having expelling vanes that aggressively pump out slurry from the seal face of the pump. The configured volute of the present invention provides resistance to wear when processing heavy duty slurries and provides stable flow performance and improved pump performance.

Growing community of inventors

Santiago, Chile

Ricardo Abarca Melo