Metallic Gasket
INSULATION GASKET AND KITS
R type
R type ring Joint gaskets comprises of two types such as Oval cross section and an Octagonal cross section. These types of gaskets are used in pressures up to 10,000 PSI. The dimensions are standardized and require specially grooved flanges. Sealing occurred in Octagonal cross section with the wedge contact, Oval cross section with single line contact. The flat bottom groove design will accept both the Octagonal and Oval cross section. The sealing surfaces on the Ring Joint Gasket and Grooves must be smoothly finished to 63 micro inches and to be free of objectionable ridges, tool or chatter marks.
Bx type
The BX Ring Gasket differs from the standard RX, Oval or Octagonal shape since it is square in cross section and tapers in each corner. BX is used at pressures up to 20,000 PSI. The BX Gaskets will have pressure relief hole at mid portion of C. The sealing surfaces on the Ring Joint Gasket and Flange Grooves must be smoothly finished to 32 micro inches and to be free of objectionable ridges, tool or chatter marks
Rx type
RX ring gaskets are similar in shape to the standard octagonal ring joint gasket but their cross section is designed to take advantage of the contained fluid pressure in effecting a seal. They are both made to API 6A and interchangeable with standard Octagonal and Oval rings for oil field drilling and production applications in API 6B flanges. RX is used at pressures up to 5,000 PSI. The sealing surfaces on the Ring Joint Gasket and Grooves must be smoothly finished to 63 micro inches and to be free of objectionable ridges, tool or chatter marks. The hardness of the Ring Gaskets should always be less than the hardness of the flanges to prevent flange deformation. Dimensions Ring Joint Gaskets are covered in ASME B16.20 and API 6A standard. These Gaskets are used in ASME B16.5 flanges, API 6B flanges and API 6BX flanges.
Rubber Coated Gasket
Rubber coated Ring Gasket (usually steel) used in pressure testing to minimize damage to flanges. The rubber contact points provide additional seals while protecting the flange surfaces.
LENS GASKET
Lens Gasket
A lens type gasket is a line contact seal for use in high pressure piping systems and in pressure vessel heads. The lens cross section is a spherical gasket surface and requires special machining on the flanges. These gaskets will seat with a small bolt load since the contact area is very small and gasket seating pressures are very high. Normally the gasket materials should be softer than the flange. In ordering lens gaskets, complete drawings and material specifications must be supplied.
DELTA GASKET
Delta Gasket
A delta gasket is a pressure actuated gasket used primarily on pressure vessels and valve bonnets at very high pressures in excess of 5000 PSI. As with the lens gasket, complete drawings and material specifications must be supplied. Internal pressure forces the gasket material to expand when the pressure forces tend to separate the flanges. Extremely smooth surface finishes of 63 micro inches or smoother are required when using this type of gasket.