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  • Valve Packing and Gasket

Valvograph V48ZR

Composition

Energized Expanded Mineral Graphite with SS316L steel foil.

Characteristics

The Valvograph V48ZR graphite sealing ring gaskets for valves, thanks to their variable specific density, offer an optimal combination of compressibility and strength, adapting to the different pressure requirements of industrial applications. The density can be adjusted to the customer's requirements, if technically feasible. Their construction with pure energized expanded graphite provides greater resilience and reliability.

Applications

These graphite rings are ideal for sealing industrial valves in services compatible with graphite. Thanks to their high thermal and chemical resistance, they are suitable for a wide range of industrial applications that require reliable performance and optimal sealing.

Valvograph V48ZR
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Typical properties of the Valvograph rings Style V48ZR Units Value
Density g/cm³ 1.55 ÷ 1.75
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
Metal reinforcement (others available on demand) - SS316L
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%