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Stein uses traditional face seal design characteristics and incorporates lift-off and hydrodynamic circumferential sealing technologies to design, engineer, and manufacture some of the most robust seals designed for oil service.

The oil seal product line operates at 5–20 psi above process pressure, one of the lowest in the industry. Pressurized gas is delivered to the seal body, either to face-sealing elements or Stein’s innovative circumferential carbon elements. The dynamic and active sealing elements and Stein’s patented element geometry reduce oil flow and migration to sour gas sumps.

Stein oil seals are integral to many critical industrial contexts, including:

  • Gas pipelines
  • Petrochemical processing plants
  • Natural-gas processing plants
  • Oil refineries

Our seals can be custom-designed for applications involving extreme conditions and toxic or volatile gases and liquids, such as propylene, propane, polypropylene, styrene, carbon monoxide, methanol, ammonia refrigeration, polyethylene, and others.

Widely known in the compressor industry, Stein oil seals are called upon to provide robust and reliable sealing systems in countless industrial applications.

Built to Deliver Every Time

In many industries, fans, pumps, compressors, and other equipment with rotating components rely on oil seals to keep them functioning effectively. In these machines, oil seals occupy the space between moving and stationary mechanical parts, making it easier to control lubricant leakage while preventing the intrusion of dirt and other contaminants into the workings of the machine.

Custom-engineered and machined to the specific requirements of each application, Stein custom oil seals are valued for their durability, dependability and performance. To arrive at the optimal seal construction, our engineers consider the anticipated operating environment for the seal, including temperature range, maximum pressure, and other factors, in addition to performance parameters, such as shaft rotation speed. Next, they calculate the necessary capacities and sizes of each component of the seal and determine the best materials for optimal performance in the intended application.

Stein oil seals are constructed from various materials, including metal, carbon and synthetic materials, like nitrile, PTFE, FKM and other fluoropolymer materials. Stein’s metallic seals are designed in cartridge style to incorporate carbon or copolymer sealing elements.

Proprietary Solutions for shaft movement

Stein Seal incorporates pressure-balanced, face-seal designs as well as dynamic secondary seal assemblies. The axial-float allowance integral to our design allows for generous shaft movement. In this way, Stein designs its cartridges to accommodate greater lateral movement.