Need a filtration separation setup for process liquids but not sure whether to start with replacement filter bags or the stainless steel housing that holds them? The decision comes down to what you already have. If your rig is missing the vessel, the Filtra Systems FSC bag filter housing is the main hardware component. If you already have a housing, the Duda Energy welded filter sock bags are the consumable side of the system.
Quick verdict
If your filtration separation rig is already running, the Duda Energy welded filter bags at $327.83 are the lower-cost way to keep it in service with 50 fresh bags. If you need the vessel itself, the Filtra Systems stainless housing at $550 is the larger commitment but supplies the working component. Choose based on the missing piece rather than price alone.
Side-by-side comparison
| Duda Energy Welded Filter Sock Bags | Filtra Systems FSC Bag Filter Housing | |
|---|---|---|
| Listed price | $327.83 | $550.00 |
| Condition | New | Used |
| What you get | 50 bags, Size #4 (4 x 14 inches), plastic ring flange, 0.5 micron | Single-bag housing with support basket, 304 stainless steel, 150 PSI max |
The listed price spread is about $222, which reflects the difference between buying 50 replacement bags and buying a used industrial vessel.
Where each product wins
The Duda Energy bags win when you need filtration media in quantity. The 50-bag lot is new, uses welded seams instead of needle holes, and includes a plastic flange with handles for removal. The fine 0.5 micron rating suits applications where you want finer particle capture.
The Filtra Systems housing wins when you need the actual filter vessel. It is built from 304 stainless steel, shows a 150 PSI maximum working pressure, and comes with a single basket support for one bag. This is the hardware that makes a bag-style filtration separation loop work.
Product notes
Duda Energy Welded Industrial Filter Sock Bags Plastic Ring Flange Water Liquid Oil WVO Fuel
On the consumable side, this listing is a 50-bag lot of Size #4 welded filter bags measuring 4 by 14 inches. The welded seams avoid the needle holes and thread contamination you can get with sewn bags, and the fused edges create a fiber-free finish that reduces the chance of media fibers entering the fluid being filtered. The plastic ring flange includes handles, which makes removing spent bags from a housing a cleaner job. This option makes sense when you already have a bag filter vessel and want a bulk load of fine 0.5 micron media for liquids such as water, oil, WVO, or fuel. The main limitation is that the lot contains only the bags, so it cannot act as a standalone filtration separation setup. You will need a housing that accepts this media size.
Filtra Systems FSC Bag Filter Housing 304 Stainless Steel 150 PSI Industrial
On the hardware side, this is a used industrial bag filter housing from Filtra Systems, made from 304 stainless steel and rated to 150 PSI maximum working pressure on the nameplate. The housing also lists a 210°F maximum working temperature and a 35 PSI maximum differential pressure, so it is built for process liquids rather than light-duty use. It is set up as a single-bag unit with a basket-style support, meaning it holds one filter bag at a time inside the vessel. Choose this when the missing piece in your operation is the housing itself, not the media. The limitations are that it comes used and does not include filter bags, so you will need to budget separately for bag media. If you can accept a used vessel and want stainless construction at this capability level, it provides the central component for liquid filtration.
Final choice by use case
Pick the Duda Energy welded filter bags when you need a 50-pack of Size #4 media with 0.5 micron filtration and a flange with handles for easier changeouts.
Pick the Filtra Systems FSC bag filter housing when you need a single-bag stainless vessel rated to 150 PSI and you are prepared to source the filter media separately.
