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    John Crane


    With a history steeped in a long tradition of innovation, John Crane is globally renowned for its ongoing commitment to research and development. The company’s pioneering spirit was first sparked back in 1910 when John Crane himself, inspired by a scrap of foil from a tobacco packet, invented a novel new design for packing. The advancements continued with the design of the world’s first automotive mechanical seal in 1939, followed closely by the Type 1 end-face elastomer bellows shaft seal just a few years later. Then in 1968, the first gas seal spiral groove patent launched the company’s reputation as a world leader in sealing technology — a distinction that endures today.

    Mechanical Seals and Systems

    From improving product modularity to meeting changing emissions standards, we’re constantly developing new solutions and improving on our best designs to offer our customers superior dependability. Today, our durable, versatile Type 28 non-contacting gas seals boast more than 750 million combined hours of operation, and our Type 2800 Series mechanical seals offer superior containment of fugitive emissions.

    The problem-solving nature of innovation often manifests as improvements to existing solutions. This is particularly evident in our redesign of the traditional API 682 water cooler, the vertical design of which made venting difficult. By re-engineering the water cooler to include a horizontal cooling coil instead, John Crane was able to increase the reliable operation of water-cooled heat exchanger units.

    Power Transmission Couplings

    In 1949, John Crane received the first patent for a membrane coupling designed for oil and gas applications, a major advancement that improved coupling service life from five years to 30 years. The UK Navy adopted it for use on its ships 10 years later, and since then it has been fitted to more than 30 navies worldwide. Similarly, when the T Series coupling was introduced into the oil and gas market in 1970, its features were used as a benchmark for API 610 — the industry’s new standard for safety and reliability.

    Hydrodynamic Bearings

    We first began developing technology that would limit power losses while allowing for larger, faster compressors, turbines and gearboxes with our multi-lobe fixed geometry journal bearings in 1954. Then, in 1998, we unveiled bearing and John Crane OCI® lubrication systems, which improve not only load and speed capability but also safety.

    Filtration Systems

    Well-designed filter units play an important role in maximizing reliability and safety, which is why John Crane developed its series of specially designed fluid and gas filtration products. In 1990, we introduced non-welded, bolted filter constructions that resulted in significant space and cost savings and enabled easy maintenance. Other innovative features include integral double-block and bleed transfer valves, triple-stage filtration that addresses particle and liquid contamination within a single filter, and double O-ring sealing on gas filters.




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