Vacuum Trap Filter Elements
Replacement elements for Mass-Vac vacuum pump traps
Every Mass-Vac trap uses replaceable filter elements, in two sizes: 4.5″ for the Posi-Trap, the 4.5″ Visi-Trap and the standard MV Multi-Trap, and 9.5″ for the 9.5″ Visi-Trap and any Multi-Trap set up for single-stage 9.5″ elements. Choosing the right media for what’s in the line protects the pump, and a trap can move to a different media later if the process changes.
Media and part numbers
| Media | Traps | 4.5″ | 9.5″ |
|---|---|---|---|
| Copper gauze | condensable particles and oil vapour | 300905 | 300900 |
| Stainless steel gauze | as copper, with added corrosion protection | 300915 | 300910 |
| Stainless steel gauze, wide screen | as above, for heavier particles | 300916 | 300911 |
| Molecular sieve | oil backstreaming and water vapour | 300925 | 300920 |
| Soda lime | acidic vapours | 300935 | 300930 |
| Activated charcoal | organic vapours | 300945 | 300940 |
| Activated alumina | Lewis acids, polar compounds, water and particles | 400915 | 400910 |
| Polypropylene 20 micron | high volumes of solids | 400945 | 400940 |
| Polypropylene 5 micron | solids and particles to 5 micron | 400935 | 400930 |
| Polypropylene 2 micron | particles to 2 micron | 400925 | 400920 |
| Polypropylene 0.2 micron | fine particles | 400975 | 400970 |
| Polypropylene 0.1 micron | very fine particles | 400976 | 400971 |
| Hydrated lime | acidic vapours | 300955 | – |
| Merc-Sorb | mercury vapour | 300965 | – |
| Ammoniasorb | ammonia and amine vapours | 300975 | 300970 |
| Sulfatreat | hydrogen sulphide | 300985 | – |
| Potassium permanganate | hydrogen peroxide vapour | – | 300990 |
| Chlorosorb | chlorine vapour | 300999 | – |
| Microfiberglass coalescing | oil mist | 360915 | – |
Large high-capacity particle filters for the 16″ Multi-Trap come in 25 micron (353125A) and 100 micron (353100A). Mass-Vac can also make media to suit a particular process.
Common applications
| Process | Media |
|---|---|
| Leak detection, mass spectrometry, RGA, SEMs, glove boxes, sputtering | molecular sieve (oil backstreaming) |
| Freeze drying, gel drying | soda lime (acid and water vapour) |
| Reactive ion etching | soda lime (acid) |
| Rotary evaporation, distillation, centrifuges | activated charcoal (organic solvents) |
| Degassing and potting resins | activated charcoal (resin vapours) |
| Vacuum ovens, plasma ashing, food packaging | stainless steel gauze (product and water vapour) |
| Ion implant, vacuum transfer, hold-down | polypropylene (powder and particles) |
Ordering
Send us the element part number and quantity. If you’re not sure which element is in your trap, the trap’s part number or a photo of the element’s ID stamp is enough. Mass-Vac’s minimum order is $150, so small orders are often best combined with your next change.
