RX Ring Joint Gasket (Pressure-Energized)

At Kriloha Ltd., we understand that as drilling goes deeper and pressures climb higher, static seals must evolve. While the standard R-series gaskets provide excellent service, the Kriloha RX Ring Joint Gasket is engineered for the next level of performance: pressure-energization. As the top supplier of heavy-duty industrial seals, Kriloha Gaskets manufactures the RX series to provide an “active” seal that responds to the environment it protects.

The RX gasket is a masterclass in asymmetrical engineering. While it appears similar to an octagonal gasket, its outer sealing face is slightly wider than the groove it sits in. This creates an initial “interference fit” upon installation. However, the true brilliance of the RX design is revealed once the system is pressurized. Internal fluid pressure acts upon the inner slanted faces of the gasket, pushing the outer sealing faces even harder against the flange groove walls. In essence, the higher the pressure in your pipe, the tighter the Kriloha RX gasket seals.

Manufacturing a Kriloha RX gasket requires extreme metallurgical control. Because the gasket must “flex” slightly to achieve its pressure-energized state, the material hardness is critical. We utilize vacuum-heat-treated forgings to ensure that the gasket remains tough enough to hold pressure but soft enough to conform to the flange groove without causing “coining” or damage. Every RX gasket from Kriloha undergoes 100% dimensional inspection to ensure the height and angle tolerances meet API 6A specifications exactly.

By choosing Kriloha Ltd., you are investing in a “High-Recovery” metal seal. The increased height of the RX profile allows the gasket to act as a heavy-duty spring, maintaining a seal even if the bolts experience slight relaxation due to vibration or thermal cycling. Whether you are managing a high-pressure gas well or a subsea injection line, Kriloha RX Ring Joint Gaskets provide the mechanical intelligence and metallurgical integrity required to keep your most hazardous operations leak-free.

Primary Use Cases

Wellhead & Christmas Tree Assemblies: The preferred seal for high-pressure oil and gas production headers.
Blowout Preventers (BOP): Providing critical safety sealing in drilling stacks where sudden pressure spikes occur.
High-Vibration Manifolds: Ideal for offshore and onshore manifolds subject to mechanical stress and pulsation.
Subsea Completion Equipment: Used in deepwater environments where the pressure-energized effect provides an extra layer of security.
Water Injection Systems: Reliable sealing for high-pressure secondary recovery operations.

FAQs

Is an RX gasket interchangeable with a standard R-series octagonal gasket?

Yes. The RX gasket is designed to fit the same flange groove as the R-series (Oval or Octagonal). However, because the RX is taller, the standoff distance between the flange faces will be greater.

What is the purpose of the small hole in some RX gaskets?

This is a “Pressure Equalization Hole.” It prevents fluid or air from becoming trapped in the space behind the gasket during installation, which could otherwise interfere with the gasket seating properly.

Why is the RX gasket considered “pressure-energized”?

The design allows internal process pressure to push against the inner walls of the ring, forcing the outer sealing surfaces more firmly against the flange groove, creating a tighter seal as pressure increases.

Can I reuse a Kriloha RX gasket?

Like all metal ring joints, reuse is strongly discouraged. The metal undergoes plastic deformation during the initial torque-down to create the seal. A used gasket will not have the necessary ductility to reform a gas-tight seal.

What materials are best for sour gas (H2S) service?

For NACE-compliant service, Kriloha recommends 316L Stainless Steel or Inconel 625, with hardness strictly controlled to below 22 HRC to prevent sulfide stress cracking.