Natural graphites - Import export

Special processing methods are used to produce what is known as exfoliated graphite or expandable graphite from natural mineral graphite. It has the unique property of abruptly expanding by many times its volume when it is exposed to heat. At Georg H. Luh, we have extensive know-how in this product field and offer the right products for a wide variety of applications with numerous different grades and variants.

Graphite, like diamond, consists of pure carbon arranged in a hexagonal crystal system. One differentiates between natural and synthetic graphite depending on the extraction or production method. Graphite exhibits a unique combination of material properties due to the special crystalline composition of the layer structure.

The range in the graphite seals segment is not limited to rings and tapes, but also includes sheets: The many advantages of billi graphite sheets include the low permeability of liquids and gases as well as high resistance to chemical substances. In addition, the plates made of natural graphite convince for their enormous stability and high resistance to temperature fluctuations. The graphite sheets can be ordered in different versions so that the perfect items are available for every application: For example, you can choose from models without steel reinforcement, with plain steel inserts and tanged stainless steel reinforcement. All graphite gaskets from our company are convenient for the targeted interaction between a high quality standard and improved health protection: you can order asbestos-free graphite sheets and many other types directly from us at a reasonable price.

Braid of Flexible Expanded Natural Graphite Tape Reinforced with Inconel Wire Practical useful application data: max. temperature in oxidizing atmosphere: +400 °C Characteristics Universal use valve packing Expanded graphite of higher quality Coefficient of expansion similar to steel For valve applications rings should be approx. 20 - 25 % compressed at installation Precompressed rings are recommended Operating range Pressure [p max]: 300 bar Temperature: t = -200… +550 °C pH: 0 - 14 Density: 1.20 g/cm³ Practical useful application data: max. temperature in oxidizing atmosphere: +400 °C Main application Valves Fittings Gate valves Flaps Plunger Door and lid seals Suitable for Power plant technology Petrochemical plants Boiler houses High pressure- and high temperature applications For higher pressure and temperature applications use suitable bullrings. Form of delivery This packing can be manufactured from 3 to 40 mm square as well as in intermediate, inch sizes and special...

Braid of Flexible Expanded Natural Graphite Tape Practical useful application data: max. temperature in oxidizing atmosphere: +400 °C Characteristics Universal use in pumps and valves Very good dry-running characteristics No wear, perfect thermal conductivity High quality pure graphite Coefficient of thermal expansion similar to steel Rings should be approx. 20 - 25 % compressed during assembly Recommended as die formed rings Operating range Pressure [p max]: 20 bar, Velocity [v max]: 20 m/s Pressure [p max]: 300 bar Temperature: t = -200… +550 °C pH: 0 - 14 Density: 1.15 g/cm³ Practical useful application data: max. temperature in oxidizing atmosphere: +400 °C Main application Valves Fittings Gate valves Flaps Door and lid seals Suitable for Power plant technology Boiler houses Petrochemical plants High pressure- and high temperature applications For higher pressure and temperature applications use suitable bullrings. Form of delivery This packing can be manufactured from 3...

Expanded natural Graphite in Purity 98 % – industrial grade or 99.85 % nuclear grade (chlorine content < 20 ppm) Temperature in steam Density min. 1.40 g/cm 3 Characteristics High cross section density Self lubrication and limited wear Dry running capability Coefficient of thermal expansion similar to steel Maintenance free and elastic, also under variable pressure Non ageing, high chemical resistance Attention! Precise tolerances and surfaces of application are requeste Operating range Pressure [p max]: 800 bar Temperature: t = -200… +550 °C pH: 0 - 14 Density: 1.80 g/cm³ Temperature in steam Density min. 1.40 g/cm 3 Main application Fittings Pumps (high temperature) Covers Valves Suitable for Valves and fittings of all Industries Approvals Oxygen BAM 200 °C/250 bar DVGW and KTW Variant Rings with integrated reinforcement or endcaps made from ANSI 316 Special quality TA Luft 300 with a leakage rate of 5.7 · 10 -3 mbar · l/(s·m) 300 °C Form of delivery ARF rings - endless,...