Metal sealing rings are designed for high pressures and temperatures - depending on the properties of the ring, they are able to seal joints with pressures up to 1500 bar and temperatures up to 1000 ° C.
- RTJ are offered in 2 basic shapes - oval and octagonal.
- The wide range of materials on offer guarantees tightness in various applications.
Ring Type Joints were originally developed for high pressure and high temperature applications in the petrochemical industry. Today we can also meet them in valve and piping systems, high pressure tanks and the like.
Care must be taken to select the correct material to avoid damaging the flange or the ring itself. The choice of ring material depends mainly on the chemical compatibility with the medium and on the hardness of the material of the flange.
The ring material should ideally be approximately 30 brinells softer than the flange.
- At this value, the ring is sufficiently deformed to ensure the tightness of the joint without damaging the flange.
RTJ metal sealing rings are divided into three basic groups:
- Available in two cross sections - oval and octagonal.
- Both of these versions are interchangeable in modern flat flanges with a groove.
- Standard "R" metal sealing rings are manufactured in size ranges according to API 6A and ANSI B 16.20.
- Type BX also uses an increase in the internal pressure of the medium to increase the effectiveness of the seal.
- It is manufactured according to API 6A and is designed up to a pressure of 20,000 psi (approx. 1380 bar).
- If the BX seal is installed correctly, it allows the flange surfaces to rest directly on the inside and outside diameters.
- The RX version uses an increase in the internal pressure of the medium to increase the sealing efficiency.
- It uses the same groove profile as type R - they are interchangeable.