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  • Valve Packing and Gasket

Valvograph V48J

Composition

Flexible Mineral Graphite

Characteristics

The Valvograph V48J graphite sealing ring gaskets for valves offer high thermal and chemical resistance, making them virtually universal and suitable for all industrial applications. The density of the molded product ranges from 1.40 to 1.70 g/cm³, but limitations may occur depending on the size of the graphite sealing ring. The density can be adjusted to the customer's requirements, if technically feasible.

Applications

Valvograph V48J seals are available both as individual components for general sealing applications and as pre-packaged sets for valves. Thanks to their high thermal and chemical resistance, these gaskets are suitable for use across a wide range of industrial sectors. Valvograph V48J graphite rings can be used to seal all fluids except oxidizing ones.

Valvograph V48J
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Typical properties of the Valvograph rings Style V48J Units Value
Density g/cm³ 1.40 ÷ 1.70
Ash content % ≤ 0.15
Carbon content % ≥ 99.85
Chloride content ppm ≤ 10
Fluoride content ppm ≤ 10
Halogen content ppm ≤ 40
Sulfur content ppm < 300
Oxidation rate at 670°C % < 4
Oxidation inhibitor - Y
Passive corrosion inhibitor - Y
Dimensions mm 10 ÷ 2300
Temperature Range °C -200 ÷ 450 / 650 
pH - 0 ÷ 14

 

Tollerances (mm) Out. D. Inn. D. Th. Wall Bulk Density
up to 250 mm [-0,20 ÷ 0,00] [-0,00 ÷ 0,20] +/- 0,20 [-0,20 ÷ 0,00] +/- 5,00%
from 251 to 500 mm [-0,25 ÷ 0,00] [-0,00 ÷ 0,25]  +/- 0,20 [-0,25 ÷ 0,00] +/- 5,00%
from 501 to 750 mm [-0,30 ÷ 0,00] [-0,00 ÷ 0,30] +/- 0,25 [-0,30 ÷ 0,00] +/- 5,00%
from 751 to 2300 mm [-0,40 ÷ 0,00] [-0,00 ÷ 0,40] +/- 0,75 [-0,40 ÷ 0,00] +/- 7,00%