How do I know for sure that I need a screen and not a frit?
If you know the filter product number, here is the critical information: all filters with replaceable frits have a product number which ends with an F, for "frit". In most cases, there is an identical product number without the F for a nearly identical filter with a replaceable screen.
If you know the product number and determine that it doesn't end in F, find the product number in the table below to see what diameter screen is required, then scroll down the page to see the available options.
If you know the product number and it does end in F, you need a frit. Go to < this page >.
If you don't know the product number, < read this >.
Visual identification of frits and screens
If you cannot use the product number to determine if you need a frit or a screen, you must take apart the filter and examine the filter element itself to determine the diameter and whether it is a frit or a screen. The diameter is easily determined by measurement with any simple ruler on hand.
Measuring the thickness requires calipers, but here is a useful guideline: the thickest screen is 0.125 mm. For comparison, a typical double-edged razor blade is .1mm - .12mm. In contrast, the thinnest 1/16" frit is 0.75 mm thick; two of them stacked are roughly the thickness of a dime. Hope that narrows it down a bit! < Hide >
Filters organized by screen diameter
| Screen diameter | Filter product number |
|---|---|
| 1/16" | ZUFR.5 |
| ZBUFR.5 | |
| ZBUFR1.5 | |
| ZBRUFR1.5 | |
| 1/8" | ZUFR1C |
| ZBUFR1C | |
| ZUFR1 | |
| ZBUFR1 | |
| ZRUFR21 | |
| ZBRUFR21 | |
| 1/4" | ZUFR2 |
| ZBUFR2 | |
| ZRUFR41 | |
| ZBRUFR41 | |
| ZRUFR42 | |
| ZBRUFR42 |
Replacement screens
All removable screen filters were originally supplied with a 2µ stainless screen, but replacement stainless steel screens are available in several thicknesses and pore sizes. Sold in packages of 10.
Screens with other pore sizes and thicknesses may be available or special-ordered in OEM quantities.
Note: If a filter was ordered with a removable screen, the screen cannot be replaced with a frit.
| Diameter | Pore size | Thickness | Product No. |
|---|---|---|---|
| 1/32" (pkg. of 10) |
1µ | 0.050 mm | 1SR.5-10 |
| 2µ | 0.075 mm | 2SR.5-10 | |
| 1/16" (pkg. of 10) |
1µ | 0.050 mm | 1SR1-10 |
| 2µ | 0.075 mm | 2SR1-10 | |
| 1/8" (pkg. of 10) |
1µ | 0.050 mm | 1SR2-10 |
| 2µ | 0.075 mm | 2SR2-10 | |
| 1/4" (pkg. of 10) |
2µ | 0.075 mm | 2SR4-10 |
| 10µ | 0.125 mm | 10SR4-10 | |
