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GM 300 / GM 300Z
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Product Description
GM 300Z is a precision-molded graphite ring engineered for static sealing applications with exceptional purity and performance. Features ultra-high purity graphite with built-in oxidation inhibitors for extended service life.
Quick Specifications
pH Range
0 - 14 (Universal)
Maximum Temperature
650°C
Maximum Pressure
250 bar
Graphite Purity
≥99.85%
Technical Data
Specifications
pH Range0 - 14 (Universal)
Maximum Temperature650°C
Maximum Pressure250 bar
Graphite Purity≥99.85%
Sulfur Content< 300 ppm
Chloride Content≤ 10 ppm
Fluoride Content≤ 10 ppm
Halogen Content≤ 40 ppm
Thermal Conductivity (Axial)400 W/mK
Thermal Conductivity (Radial)6 W/mK
Coefficient of Friction (to steel)0.05
SizeAccording to chamber size
Additional Technical Data
MaterialHigh purity flexible graphite foil with oxidation inhibitor
Thermal ConductivityAxial: 400W/mK, Radial: 6W/mK (at density 1.4g/cm³)
Coefficient of Friction0.05 to steel
CertificationShell MESC SPE 85/203
Benefits
Key Features
Ultra-high purity graphite (≥99.85%) with exceptionally low halogen content
Built-in oxidation inhibitor extends service life significantly
Suitable for both rotary and rising-stem valve applications
Fire-safe design provides additional operational safety
Free from binders, elastomers, and fillers ensuring maximum purity
Exceptional thermal conductivity for effective heat management
Low coefficient of friction reduces operational wear
Use Cases
Applications
Valve stem sealing systems
Valve seat sealing systems
Rising stem valves
Rotary valves
Class 150–1500 valves
Higher pressure classes (upon technical review)
Nuclear power generation applications
High-temperature industrial valve systems
Additional Support?
Contact our sales team for pricing, availability, and technical specifications.