Photographed from stock — polypropylene needlefelt with the moulded snap-ring collar.
Misonics size 4 liquid filter bags — polypropylene felt, 5 micron. Polypropylene needle-felt is a depth media — contaminant traps through the full thickness of the felt, giving high dirt-holding capacity at low cost. The singed finish and fully welded construction mean no fibre migration and no thread-hole bypass into your process.
Filter bags trap contaminant as liquid is piped through the bag inside a bag housing — filtered fluid passes out the housing outlet and back to the process. When the bag loads up, change-over takes a minute: lift out, drop in, snap home. In an ultrasonic cleaning loop the bag continuously catches what the ultrasonics strip, keeping the bath working between change-outs.
Features- Polypropylene needle-felt, singed finish
- Fully welded seams — no needle holes, no bypass
- Broad chemical compatibility — acids, alkalis and caustic baths
- High dirt-holding depth media
- 4" × 14" (102 × 356 mm) — industry-standard size 4 body
- 0.16 m² (1.7 sq ft) filter surface area
- Max temperature 90 °C (200 °F)
- Nominal 5 micron rating
Rating note: nominal media capture the majority of particles at the stated size; absolute mesh has a fixed woven aperture. Ask us which suits your duty.
| Part code | MFB-S4-PP-5-P (poly snap ring) / MFB-S4-PP-5-S (stainless) / MFB-S4-PP-5-G (galvanised) |
| Bag size | Size 4 — 4" × 14" (102 × 356 mm) |
| Micron rating | 5 µm (nominal) |
| Media | Polypropylene Felt |
| Filter area | 0.16 m² (1.7 sq ft) |
| Max flow (water) | 8 m³/h — size for 50–70% in service |
| Max temperature | 90 °C (200 °F) |
| Collar options | Polypropylene snap ring with flip-up lift handle (-P) · Stainless steel ring, 304 (-S) · Galvanised steel ring (-G) |
| Housing fit | 415 — standard size 4 bag housings |
Sold by the bag, minimum five, at the price on this page. Volume and standing-order pricing available — most configurations ship from stock; unusual micron and collar combinations are made to order.
Add to cart on this page, or call the office for a standing order. Don’t see your size or media? Contact us — polyester felt, PE, oil-absorbent media and other bodies are available.
Minimum 5 bags, then any number above that. Flat $20 freight anywhere in Australia, however many bags you order. Outside Australia, request a delivered price.