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John Crane Lemco PR52/PR53A Reservoirs
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John Crane Lemco PR52/PR53A Reservoirs


The PR 52/53A are reservoir-based seal support systems designed to provide pressurized and unpressurized buffer/barrier fluid to dual mechanical seals for API 682 Plan 52 and 53A applications. Buffer/barrier fluid is circulated by using a pumping ring or circulating pump. 

Integrated pumping rings, instrumentation, and heat exchangers maintain optimal barrier fluid conditions to prevent process contamination and enhance seal reliability. Optional features like flanged removable heads simplify maintenance. The systems safeguard seals across demanding oil and gas, chemical and general industries, and high-purity and organics applications.


  • Designed per API 682 4th Edition. 
  • Standard tubing or welded pipe construction with flanged connections available.
  • Heat exchanger options available to meet facility needs.
  • Removable head variants (API G35) for streamlining maintenance.


  • Process pumps.
  • Pipeline pumps for highly abrasive products.
  • Mixers and agitators.
  • Slurries.
  • Organic and high-purity applications.
  • Oil and gas processes.


  • Capacities from 3 gal to 5 gal (12 l  to 20 l). 
  • 316/316L stainless steel construction.
  • Temperatures up to 350°F standard.
  • Viscous fluid compatible.
  • Handles particulate contamination.
  • Ensures low seal face temps.


Crane Engineering recommends John Crane seals for many sealing applications throughout your facility. We've seen them be put to the test in harsh environments and difficult to seal applications, and succed. Their lines of single cartridge seals offer fast and easy installation for maintenance teams with little time for seal maintenance.


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It’s all about helping our customers succeed. We make substantial investments in technology and people to meet the demands of our customers so you stay in control and accomplish more.

At Crane Engineering, your experience as our customer matters.

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