Ring gasket for JIS flat seat pipe flange

For flat face flange

For large flat face flange

For small flat face flange

Product Specification

Specifications Table

Unit mm

• *Rubber sheet gaskets are compatible with nominal pressures up to 2K and 5K.
• *Valflon gaskets are not compatible with nominal pressures of 30K or higher.
• *Valcafoil gaskets are compatible with nominal pressures of 10K, 16K, and 20K.

Product Feature Details

VALQUA Part Number 6500

• Product name: General-purpose non-asbestos joint sheet
• Ideal as a general-purpose gasket for pipe flanges in utility lines such as water and oil, as well as for various types of industrial equipment.
• Suitability for water supply equipment has been confirmed based on JIS S 3200-7.
• Various industrial pipe flanges for petroleum refining, chemical, marine applications, valve bonnets, and joints for various equipment.

• Compatible fluid: water, seawater, hot water, steam, crude oil, alcohol, animal and vegetable oils, heating medium oils, general solvents, weak acids, weak alkalis, air, nitrogen gas, inert gas, exhaust gas, etc.
• Unsuitable fluids: strong acids, strong alkalis, various solvents, flammable, oxidizing, and toxic gas, etc.
• Use: pipe flange for various industrial applications such as petroleum refining, chemical, marine, valve bonnet, and various equipment joints
• Main Components: NBR, Aramid Fiber, Rock Wool, Inorganic Filler
• Color/Printing: blue/black

VALQUA part number 6502

• Product name: Black Super
• Compared to 6500, it has excellent heat resistance. Compatible with a wide range of applications.
• Composed of the minimum required amount of organic fiber, and heat resistant synthetic inorganic fiber and carbon fiber.
• Thanks to its special structure, the surface of the sheet is smooth and the interior is highly dense, providing excellent sealing performance.

• Compatible fluid: water, seawater, hot water, steam, crude oil, alcohol, animal and vegetable oils, heating medium oils, general solvents, weak acids, weak alkalis, air, nitrogen gas, inert gas, exhaust gas, etc.
• Unsuitable fluids: strong acids, strong alkalis, various solvents, flammable, oxidizing, and toxic gas, etc.
• Use: Petroleum Refining/Chemical, Steam Line, Pipe Flange, Valve Bonnet, Various Equipment Joints
• Main Components: NBR, Aramid Fiber, Carbon Fiber, Rock Wool, Inorganic Filler
• Color/Printing: Gray/Black

VALQUA Part Number 7020 (Food)

• Product name: Vulcalon gasket
• A gasket containing inorganic fillers to improve the cold flow (creep phenomenon), which is a weakness of PTFE.
• Combines heat resistant, chemical resistant, and anti-cold flow properties, making it ideal as a gasket for lines handling various chemicals (such as highly concentrated hot sulfuric acid and hot nitric acid).
• Not suitable for high concentration alkalis such as sodium hydroxide, hydrofluoric acid, polymerized monomers, etc.
• Compliant with the Food Sanitation Act of Japan, Standard for Foods and Additives.

• *(Food) indicates compliance with the Food Sanitation Act of Japan, Standard for Foods and Additives.

• Compatible fluid: water, seawater, hot water, steam, crude oil, alcohol, animal and vegetable oils, heating medium oils, general solvents, weak acids, weak alkalis, air, nitrogen gas, inert gas, exhaust gas, combustible gas, toxic gas, oxygen, cryogenic fluids, etc.
• Unsuitable fluids: High concentration alkalis such as sodium hydroxide, hydrofluoric acid, polymerized monomers, etc.
• Applications: Connection points such as pipe flanges, valve bonnets, tower and tank covers, kettles, pressure vessel and heat exchanger cover flanges, and nozzles in various factories, power plants, refineries, steel mills, ships, etc.
• Main components: PTFE, silica.
• Color: Beige.

VALQUA part number GF300 (Food)

• Product name: Black Hyper
• Among high-performance sheets, this is a general-purpose type ideal for utility lines such as steam and oil.
• Compliant with the Food Sanitation Act of Japan, Standard for Foods and Additives.
• Among products using PTFE as a binder, this product offers significantly improved creep relaxation properties, which had been a challenge until now, resulting in excellent long-term high-temperature performance.

• *(Food) indicates compliance with the Food Sanitation Act of Japan, Standard for Foods and Additives.

• Compatible fluid: water, seawater, hot water, steam, crude oil, alcohol, animal and vegetable oils, heating medium oils, general solvents, weak acids, weak alkalis, air, nitrogen gas, inert gas, exhaust gas, combustible gas, cryogenic fluids, etc.
• Incompatible fluid: oxidizing acids, oxidizing fluids such as oxygen, polymerizable monomers, strong alkalis, toxic gas, hydrofluoric acid.
• Applications: Connection points such as pipe flanges, valve bonnets, columns/tanks, kettles, cover flanges of pressure vessels and heat exchangers, and nozzles in various factories, power plants, refineries, steel mills, ships, and more.
• Main components: PTFE, silica, graphite.
• Color/Printing: Dark gray / Black.