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John Crane has introduced a liveloaded mechanical packing cartridge, the Type LMPC seal, for static or dynamic sealing applications.
The one-piece seal is mechanically loaded in the axial direction by a gland follower and can be installed to new or existing equipment without modifications. It is a pre-assembled packing cartridge seal that is built to order. It can be designed and assembled with the right adaptive hardware and packing materials to suit a wide range of equipment and applications. Designed for both high and low temperature applications and a range of pressures the compact design is said to make it suitable for use in all types of process equipment such as mixers, agitators, positive displacement pumps, centrifugal pumps, hydraulic cylinders, valves and reciprocating pumps. The live-loading feature allows for in-service self-adjustment of the packing load with the aid of Belleville disc springs. This eliminates frequent manual gland bolt adjustment and increases intervals between manual retorquing. The design features a hard-coated shaft sleeve, positive mechanical drive and internal/external flush and lubrication capabilities. PTFE spacers hold all internal components of the seal together. Cartridges have been supplied for shafts from ยพ to 25inches diameter.
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