Overview
Non-contacting mechanical seals operate with inert gas as a seal face lubricant.
They provide a highly durable mechanical sealing solution for demanding refinery and chemical processing applications. Because the seal faces don’t touch, non-contacting sealing technology can also be used to preserve product purity.
John Crane non-contacting mechanical seals can assist companies seeking a zero-emission or zero-leakage mechanical seal solution to meet environmental and safety regulations.
For applications that require both contacting and non-contacting mechanical seal solutions, contact John Crane to discuss our complete portfolio engineered for efficiency, compliance and operational excellence.
Explore our non-contacting seal solutions
Type 8628VL multiphase lubricating pipeline seal
A fully non-contacting mechanical seal designed specifically for ethane and ethylene pipeline operators....
Type 2874
Non-contacting dual gas seal cartridge for pumps
The Type 2874 is an internally pressurized, gas-lubricated, non-contacting dual cartridge seal....
Type 2874HTC
Non-contacting, metal bellows, outward pumping dual pressurized gas lubricated seal
Reliably sealing high and low temperature process fluids up to 425°C (800°F...
Type 28SCB
Non-contacting secondary containment seal
The Type 28SCB is a gas-lubricated, non-contacting secondary containment seal, which is applied as a component of a multiple seal cartridge....
Type 2800E
Non-contacting, gas-lubricated seals for small-bore rotating equipment
The rotating mating ring features micromachined spiral grooves that compress an inert barrier gas...
Type 2800EH
Externally mounted, gas-lubricated, non-contacting cartridge double seal for pumps
The John Crane Type 2800EH is a non-contacting dual seal for non-turbo small-bore…
Type 2800EX
Externally mounted, gas-lubricated, non-contacting cartridge double seal for pumps. Unique spiral groove technology
Patented John Crane spiral grooves are machined into the mating ring faces…
Type 2800XA
Non-contacting gas-lubricated dual cartridge seal for large-bore pumps
The patented technology and tolerant design make these seals ideally suited for applications...
Type 2800XP
Non-contacting, gas-lubricated dual cartridge seal for large-bore pumps
The John Crane Type 2800XP is a non-contacting dual seal for non-turbo, large-bore rotating equipment…
Type 2800XS
Non-contacting, gas-lubricated dual cartridge seal for large-bore pumps
Type 2800XS is the designation used for specially engineered seals designed…
John Crane Performance Plus™
John Crane Performance Plus™ is our modular service framework, supported by the largest mechanical seal service network, with over 200 manufacturing, sales and service centres globally. That means we are where you need us, when you need us – empowering people, plant and performance.
Common questions
What is a non-contacting seal?
A non-contacting seal is a mechanical seal that operates with a thin gas film separating the seal faces. Because the faces never touch, it reduces wear, heat generation and leakage, offering reliable sealing for demanding industrial applications.
What is the difference between a contacting and non-contacting mechanical seal?
Contacting seals rely on physical contact between seal faces for sealing, which creates friction and wear. Non-contacting mechanical seals use a gas film to separate the faces, eliminating contact, reducing heat and wear, enabling lower leakage and longer operating life.
What are non-contacting seals made of?
Non-contacting seals are typically made of hard, durable materials such as silicon carbide, tungsten carbide and carbon. These materials withstand high temperatures, chemical exposure and continuous operation without wearing down.
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