The SNF furnace is designed to test the swelling index number of coal in accordance with the following standard test methods
- BS ISO 501:2012 Hard coal. Determination of the crucible swelling number
- ASTM D720 / D720M – 15 Standard Test Method for Free-Swelling Index of Coal
Standard features
- For testing the free swelling index number of coal
- Also known as the crucible swelling number
- For testing to BS ISO 501:2012 and ASTM D720/D720M-15
- 30mA (RCD) residual current circuit breaker, protects the operator (because the test requires operation with the door open during heating)
- Accurate temperature control from the 132 (PID) controller
- Supplied with wire crucible holder
Options (specify these at time of order)
- A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications - more information
- Accessory crucibles and lids available
- {{LL::products.snf.options.bullets.3}]
- Spare parts available separately or in a kit comprising; thermocouple, thermocouple sheath, heating element, solid state relay (SSR) and door insulation piece
Swelling Number Index Furnace - SNF Technical Data
| Max temp (°C) | 900 |
|---|---|
| Maximum continuous operating temp (°C) | 850 |
| External crucible height (mm) | 26 |
| External crucible diameter (mm) | 41 |
| Internal crucible diameter at the base (mm) | 11 |
| Dimensions: External H x W x D (mm) | 330 x 410 x 300 |
| Thermocouple type | K |
| Max power (W) | 800 |
| Power supply | 220V - 240V, 50-60Hz, single phase and neutral, with protective earth (ground) connection |
| Weight (kg) | 26 |
