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INDUSTRIAL O-RING PUSHER SEALS

O-ring pusher seals

John Crane O-ring pusher mechanical seals are engineered for reliability, ease of maintenance and long service life.

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O Ring Pusher Overview 800X600

OVERVIEW

What is an O-ring pusher seal?

An O-ring pusher seal is a type of mechanical seal that uses a circular elastomeric ring as the secondary sealing element.

The O-ring provides both static and dynamic sealing by maintaining tight contact between the seal faces and housing components. The O-ring mechanism allows the seal to move axially, compensating for face wear, misalignment or shaft movement while maintaining consistent sealing performance.

Our portfolio of O-ring pusher mechanical seals includes cost-effective component designs and high-duty and API 682-qualified solutions.

Each solution is developed to provide dependable sealing for some of the industry’s most demanding applications.

O Ring Pusher Seal 800X600

IN MORE DETAIL

What are O-ring pusher seals used for?

O-ring seals are widely used across industrial pumping equipment and rotating machinery due to their versatility and robust operating capabilities.

These seals perform reliably in applications in these industries:

  • Chemical
  • Waste and water treatment
  • Oil and gas
  • Food and beverage
  • HVAC systems

Their ability to handle moderately high pressures, combined with straightforward replacement, makes industrial O-ring pusher seals a dependable choice for both OEM manufacturers and maintenance teams.

As a trusted global provider, John Crane’s O-ring pusher seals offer proven performance, extended seal life, and reduced operational downtime.

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.

More about our John Crane Performance Plus™ service solutions
FREQUENTLY ASKED QUESTIONS

Common questions

How do O-ring seals work?

O-ring pusher seals work by compressing an elastomer ring to create a secure sealing interface. In John Crane designs, the industrial O-ring pusher seals support axial movement, keeping seal faces correctly loaded to deliver reliable, controlled leakage performance in demanding pump applications.

How should you fix leaking O-rings?

To resolve leaking O-rings, John Crane recommends inspecting for wear, chemical incompatibility or incorrect sizing, then replacing the element with a high-quality O-ring sealer. Clean all hardware surfaces and install the new O-ring correctly to restore optimal sealing performance.

How to replace the O-ring on a push valve?

Shut down the system, remove the valve assembly and replace the worn O-ring with a correctly sized O-ring pusher seal. Lubricate the elastomer if suitable, reassemble the valve, and verify sealing integrity in line with John Crane best practices.

How long should O-ring seals last?

Service life varies by material and conditions, but high-quality John Crane O-ring pusher mechanical seals typically deliver extended performance in pumps and rotating machinery. Proper installation, material compatibility and stable operating conditions help maximise longevity.

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