Custom Filtration Solutions (CFS) — an accurate measurement means a perfect fit, reliable cleaning, and stable pressure drop. This guide provides formulas, diagrams, and a worksheet so you can submit specs with confidence.
| When you know… | Compute… | Formula | Notes |
|---|---|---|---|
| Flat Width (FW) | Diameter (D) | D = (FW × 2) / 3.14 |
3.14 is an approximation of π. |
| Diameter (D) | Flat Width (FW) | FW = (D × 3.14) / 2 |
Record to 1/16–1/8" before rounding. |
Tip: Measuring a bag that’s already flattened? Use Flat Width and convert to Diameter with the table above.
| Method | Reference Points | What to Record |
|---|---|---|
| A. Center of Snap Band → First Stitch Row | From the centerline of the double-bead snap band at the top to the first row of stitching on the disc bottom. | Total length (e.g., 102.5"). Include bead type and top style. |
| B. Top Edge → First Stitch Row | From the very top edge of the bag to the first row of stitching on the disc bottom. | Total length in inches. Note that you measured from the top edge. |
Important: Choose one method and use it consistently across all bags and future orders.
| Collector Type (Pulse-Jet / Reverse-Air / Shaker) | |
| Quantity of Bags | |
| Diameter (D) (in) or Flat Width (FW) (in) | |
| Length Method (A or B) & Measured Length (in) | |
| Top Style (Snap Band – double bead) | |
| Bottom Style (Disc bottom – reference stitch row) | |
| Media (Polyester / Aramid / PPS / PTFE) | |
| Finish / Options (Singed / Glazed / PTFE membrane) | |
| Grounding (Ground Wire length / Ground Tabs) | |
| Operating Conditions (Temp, moisture, chemistry) |