Cylindrical Filter with Wrapped Cloth (cyl./cloth)?

[cray54]

While reading about sap filtration, I found a paper from 2008 that compared some filters. They talk about a "cylindrical filter with wrapped cloth", and also call it a "line-filter".

Any suggestions about what type of filter they tested? I can't seem to find good information about it. My best guess was a milk filter, but they do reference using systems designed for maple or for water (they don't specify milk).

https://mapleresearch.org/wp-content/uploads/0208variousfilterseffects.pdf

Thank you, Chris

[Brian]

I belive CDL sold them when you bough a new Ro they came with one. The new one is a stainless filter that I bough this year.

[murferd]

I think what you're talking about is a Sirofilter from Lapierre. We've had one for 15 years & think it's great. We generally finish 8-9 imp gallons at a time, mix DE in & run it through. Take it apart, wash the crap of the outside with garden hose, then throw the wrap around filter in washer with the cone prefilters & it''s good to go again. They're not cheap, but what is? I've heard it's better than a filter press for small batches, but now they are small presses, so who knows.

[cray54]

...We generally finish 8-9 imp gallons at a time, mix DE in & run it through...

I see now the post wasn't quite clear, I meant a filter for sap rather than for finished syrup. I edited for clarity.

[mainebackswoodssyrup]

The sap filters like what Bascom sells?
https://bascommaple.com/collections/filters

We use them, need to order some more actually so thanks for the reminder!

[cray54]

The sap filters like what Bascom sells?
https://bascommaple.com/collections/filters...

This study primarily compares 4 different types of filters for sap. They call the ones in your link "bag filters". They also talk about cartridge filters, DE filters, and "wrapped cloth" filters, which are the ones I'm looking to identify.

[DrTimPerkins]

The wrapped cloth filter housings and filter cloths were made by Lapierre Maple Equipment. They require a pump to push the sap through them. Work reasonably well, but washing the cloths takes some time. It was a bottleneck in out system, even with a spare filter housing and quick connections to make swapping out quicker. We converted ours to filter cartridge style with kits from Lapierre.

[murferd]

The wrapped cloth filter housings and filter cloths were made by Lapierre Maple Equipment. They require a pump to push the sap through them. Work reasonably well, but washing the cloths takes some time. It was a bottleneck in out system, even with a spare filter housing and quick connections to make swapping out quicker. We converted ours to filter cartridge style with kits from Lapierre.

I'm interested in what you mean by filter cartridge style? Don''t remember seeing or hearing about such a thing.

[DrTimPerkins]

I'm interested in what you mean by filter cartridge style? Don''t remember seeing or hearing about such a thing.

OK...was on my phone before, but on computer now so can provide a longer answer.

A Lapierre Canister Sap Filter is an external blue-plastic cylinder about 30" tall (don't hold me to that) with metal ends. Bottom is simply a cap. Inside the cylinder is another perforated cylinder around which you wrap a white filter cloth (different micron sizes are available) which fastens with velcro. If I recall correctly, unfiltered sap is pumped into the space between the two cylinders, goes through the cloth, and the filtered sap passes into the central area and then out through the top.

A pressure Sirofilter does the same sort of thing but is made for use with syrup and DE.

Lapierre made a retrofit kit that allowed owners to remove the inner cylinder and replace it with a piece that held 5-6 (don't recall how many) 24" filter cartridges instead of the filter cloth. Unfiltered sap was pumped into the open space in the device, went in through the filters, and filtered syrup passed out of the central core of the cartridges into an exit port. This basically is the same sort of thing used for sap filtration before the RO unit.

They look like what is shown in the upper right corner of page 77 of the 2023 Lapierre Catalog
https://elapierre.com/wp-content/uploads/2023/03/CATALOG_English_2023_web.pdf