Mott Porous Metal Centering Ring Diffusers (GSD Series)

Specifications:
- Made from 316LSS porous media available in various grades.
- Media is welded and leak tested.
- Standard vacuum connection sizes are provided.

Selection Guide:
1. Determine the size of the centering ring using Table 2.
2. Choose the media grade using Table 4 to calculate acceptable flow to pressure drop. Calculate the flux rate by dividing the application flow rate by the porous area.
3. Refer to Table 3 for particle collection efficiency of the media grade. Note that diffusers primarily reduce turbulence, not particulates.
4. Build the catalog number using Table 1, ensuring compatibility of materials with the process.

Key Tables:
- Table 1: Catalog number configuration for different connection styles and media grades.
- Table 2: Dimensions and porous area for different centering ring sizes.
- Table 3: Initial collection efficiency for various particle sizes.
- Table 4: Flow characteristics for different media grades.

Mott Porous Metal Filter/Diffusers (GSE Series)

Specifications:
- Achieves a 9 log reduction (99.9999999%) in particles down to 0.003 µm.
- Available in 316LSS or Nickel porous media with various end connections.

Sizing Filter Diffusers:
1. Determine the application flow rate in slpm.
2. Choose a filter diffuser from Table 6 with a max flow rating equal to or greater than the application flow rate.
3. Confirm the flow/delta P using Table 5 to ensure acceptable pressure drop.
4. Build the catalog number from Table 6, ensuring material compatibility.

Key Tables:
- Table 5: Flow vs differential pressure for different flow rates.
- Table 6: Catalog number configuration for different connection styles and media materials.
- Table 7: Dimensions for different flow rates and media materials.

Figures:
- Figure 1: Cross-section of the centering ring diffuser.
- Figure 2: Dimensions of centering rings.
- Figure 3: Face seal dimensions for filter/diffusers.

Conclusion:
The document provides detailed specifications and selection guides for Mott Corporation's GasShield® Diffuser and Filter/Diffuser products, emphasizing the importance of selecting the correct size, media grade, and ensuring material compatibility for optimal performance.