The short answer
Within JINLV's existing filter bag size chart, #1 and #2 share a listed diameter but differ in length and reference filtration area. This makes them candidates for different installation envelopes and duties, not interchangeable inserts or a guaranteed two-to-one flow upgrade.
Use the existing chart as the starting record
The JINLV chart is the authoritative catalog-size reference for this comparison: #1 is listed as Ø180 × 450 mm with 0.24 m² area, and #2 as Ø180 × 810 mm with 0.48 m² area. These catalog figures identify candidates; the approved ring, basket and installed-length definition still govern fit.
Do not reconcile a supplier difference by averaging dimensions. Other manufacturers publish their own numbered configurations. Retain the original manufacturer's model and drawing when assessing an installed system, then request confirmation of the proposed replacement against that interface.
Compare the complete installation envelope
A common listed bag diameter does not establish an identical vessel footprint. The housing's connections, legs, cover mechanism and service access can control the required floor space. A longer bag also makes vertical access and removal arrangements important, but the actual clearance comes from the housing drawing, not the bag length alone.
For a skid review, show installed height, cover-opening movement, basket withdrawal space and the safe route for removing a wet loaded bag. Include nearby pipes and structures. A layout that accommodates the closed vessel may still obstruct routine maintenance. Ask for this envelope before deciding that #2 fits an existing #1 location.
Separate area from a capacity promise
More catalog area creates an opportunity to reduce average loading per unit area at a given flow when otherwise comparable media is used effectively. It does not specify the resulting pressure drop, particle removal or time between changes. Viscosity, particle distribution, cake behavior, media construction and flow distribution can all change the outcome.
Eaton's SENTINEL data sheet qualifies its flow figures with a liquid-viscosity condition. Treat that as an example of why ratings need conditions, not as JINLV sizing data. Ask for a duty-specific assessment or controlled trial instead of multiplying an existing flow by the ratio of listed areas.
Make the choice using a purchasing matrix
Use this matrix to organize the missing evidence. Neither column is an automatic recommendation.
| Decision | When #1 may remain a candidate | When #2 may merit review |
|---|---|---|
| Installation space | The identified housing and service envelope fit the location | A compatible taller assembly and service access can be accommodated |
| Filtration area | The documented duty meets its acceptance criteria | Additional effective area may address an identified duty constraint |
| Basket selection | The specified #1 basket supports the accepted bag | A verified #2 basket and housing combination is available |
| Existing system change | Keep the released assembly if performance is acceptable | Assess the entire assembly; do not simply insert a longer bag |
Approve the bag and basket as a matched set
Confirm basket identity, ring-to-seat fit, body support and bottom geometry before a process trial. A #1 bag in a deeper basket is not automatically supported correctly, and a #2 bag folded into a shorter basket is not an acceptable shortcut. Follow the housing supplier's approved configuration rather than relying on the bag number.
For a hypothetical space-constrained process, the review may find enough floor area but insufficient basket-lifting clearance. That is an installation constraint, not evidence that #1 has better filtration. Record the limiting factor and compare only feasible configurations. Trained operators must conduct internal checks and trials under approved isolation and operating procedures.
Your review checklist
- Reference the existing JINLV chart and proposed bag code.
- Obtain the actual housing footprint and maintenance envelope.
- Identify the matched basket, ring and installed length.
- State liquid, viscosity, temperature, solids and target flow.
- Define acceptable pressure-drop and downstream-quality criteria.
- Record why the selected assembly meets both access and duty requirements.
Limits of this guidance
Catalog-based buyer comparison, not a universal #1/#2 dimensional standard or flow guarantee. This article does not approve a housing conversion or establish JINLV process performance; final selection requires the actual assembly and duty evidence.
Questions buyers ask
Does twice the catalog area mean twice the useful flow?
No. The area ratio is only one input. A flow decision needs the media, liquid properties, solids, acceptable pressure drop and the housing's own constraints.
Can I change only the basket to convert a #1 housing?
Do not assume so. The vessel geometry, sealing arrangement and approved components must support the conversion. Obtain the housing supplier's documented configuration before proposing a change.
Technical references
References support general principles or the named supplier's own products; they do not certify or validate a JINLV configuration.
- Standard Liquid Filter Bag Size Chart (#1–#5) | JINLV
- Liquid Filter Bags Spec Sheet
- SENTINEL Filter Bags Technical Data Sheet EN
AI-assisted technical synthesis of the references below, with editorial checks. This is general procurement guidance, not an independently signed engineering review or a product validation report.
English is the indexing version. Chinese and Indonesian are reading translations of the same article.