BPG 6501
Properties
BPG graphite rings are produced from permanently elastic expanded graphite, available in various grades, i.e. nuclear grade with a carbon purity of ≥99.85% and industrial grade with a carbon purity of ≥98%. Derived from natural graphite flakes that undergo chemical and thermal treatment, the expanded structure allows the material to be compressed into durable, elastic sealing elements without the need for bonding agents.
Applications
The product is designed for use in general valve, control valve, boiler and high pressure valve applications.
Design
BPG graphite rings are specially manufactured according to specification and application requirements. Media pressure (MPa) and dimension (ID, OD) are the key operating factors which determine the correct design. More details on request.
Availability
BPG graphite rings are supplied in different graphite purities and densities. Depending on requirements BPG graphite rings are available as endless rings with angle or straight cut or split into two half rings.
Operation Parameters
| Temperature | –200°C … +550°C (almost all media and air) –200°C … +700°C (steam) –200°C … +2500°C (inert gas) |
| ph Value | 0 … 14 |
| Pressure | 100 MPa |
Product Specifications
| Media | Hot water, steam, gases, oils, acids and alkalis. Exceptions: strongly oxidising acids such as sulphuric and nitric acid in high concentrations. |
| Certificates / Approvals | BAM approval for gaseous oxygen (45MPa up to 60°C; 22MPa up to 200°C) |
Material
| Material | Graphite purity | Density |
| 6531-13 | 98 % | 1.3 g / cm³ |
| 6531-14 | 98 % | 1.4 g / cm³ |
| 6531-15 | 98 % | 1.5 g / cm³ |
| 6531-16 | 98 % | 1.6 g / cm³ |
| 6531-18 | 98 % | 1.8 g / cm³ |
| 6501-13 | 99.85 % | 1.3 g / cm³ |
| 6501-14 | 99.85 % | 1.4 g / cm³ |
| 6501-15 | 99.85 % | 1.5 g / cm³ |
| 6501-16 | 99.85 % | 1.6 g / cm³ |
| 6501-18 | 99.85 % | 1.8 g / cm³ |
Benefits
- High chemical resistance and thermal stability
- Strong sealing ability with elasticity
- No cold flow, shrinkage, or aging
- Meets nuclear purity standards (<20 ppm chlorides)
Construction
