VALQUA, LTD.

Ring Joint Gasket

Detail

：Detail

Download

：Download

VALQUA No.	Product Name	Description	Application	Detail
550-ZA	Ring Joint Gasket (API-RX)	This gasket is used for oil drilling and other applications that requires pressure resistance, thanks to its octagonal shape.	It is used as a gasket in high pressure joints, such as in oil drilling equipment.
550-ZB	Improved Bridgeman Gasket (Wedge)	This unique self-seal type gasket applies Bridgeman’s “Principle of Unsupported Area” to use the pressure applied to the edge face of the floating head to increase tension force.	It is often used as a gasket for high temperature/high pressure valve bonnets (9.8 MPa or higher), heat exchangers, autoclave cover packing, etc.
550-ZD	Delta Ring (Triangle)	This self-seal type gasket has a triangular cross section, and is used for pressurized container covers and valve bonnets up to 343 MPa.	It is used as a cover gasket for high temperature/high pressure autoclaves and heat exchangers, or as a gasket for valve bonnets.
550-ZE	Diamond Shaped Ring	This comparatively small metal ring has a diamond shaped cross section, and is often used in locations such as nipples that are tightened with screwing force.	It is used as a gasket for high temperature/high pressure pressure gauge installations, nipple type joints, etc.
550-ZL	Lens Ring (Lens)	This gasket has a cross section similar to a convex lens. It is self-sealing as it is wedged between flanges formed into a cone shape with a 20° angle and sealed with line contact.	It is used as a gasket for high temperature/high pressure ammonia methanol synthesis line pipe flanges, pressurized containers, 294 MPa high pressure method polyethylene polymerization lines, etc.
550-ZO	Ring Joint Gasket (Oval)	This metallic ring is formed by processing the cross section of a metallic material into an oval shape. Its dimensions and materials are based on JPI-7S-23 or ASMEB1620.	It is often used as a gasket for pipe flanges, pressurized containers, towers, tanks, valve bonnets, etc., that handle high temperature/high pressure steam, gas, oil, solvent, etc., in oil refining/chemicals, electricity, ships, etc.
550-ZP	Ring Joint Gasket (API-BX)	This gasket is used for oil drilling and other applications that requires pressure resistance, thanks to its octagonal shape.	It is used as a gasket in high pressure joints, such as in oil drilling equipment.
550-ZR	Circle Shaped Metal Gasket (Circle)	This gasket has a round-shaped cross section, and is used for high pressure joints with comparatively small dimensions.	It is used as a gasket for valve bonnets, compressors, vacuum pumps, reactors, high pressure unions, nipples, etc.
550-ZS	Ring Joint Gasket (Octagonal)	This metallic ring is formed by processing the cross section of a metallic material into an octagonal shape. Its dimensions and materials are based on JPI-7S-23 or ASMEB1620.	It is often used as a gasket for pipe flanges, pressurized containers, towers, tanks, valve bonnets, etc., that handle high temperature/high pressure steam, gas, oil, solvent, etc., in oil refining/chemicals, electricity, ships, etc.
550-ZW	Double Cone Shaped Gasket (Double Cone)	This self-sealing gasket has a double cone cross section. It is often used by wedging an aluminum board or graphite tape between it and extremely soft iron, then sealing. In addition to reducing the amount of precision work, this causes no damage to the seal surface.	It is used as a gasket for high temperature/high pressure tank heat exchanger covers.