Quick take
If you are sorting out filtration separation, the first question is whether you are filtering a liquid or cleaning compressed air. On the liquid side, there is a single 1-micron bag at $19.99 and two 50-bag lots at $316.00 and $327.83, both rated at 0.5 micron. On the air side, a 5-micron filter with a metal bowl and auto drain costs $73.99. A single bag is useful for testing or small batches; a 50-bag lot makes sense if you change filters regularly; the air filter is for anyone who wants to remove moisture and debris from a compressed air line.
Listed price comparison
| Product | Price | Price bar | Micron | Qty/Size | Best use |
|---|---|---|---|---|---|
| Industrial filter bag, 1 Micron Filter Sock Bags, Water Liquid Oil Dust Fuel-1um | $19.99 | 1 micron | 1 bag, 18" length | Single-bag liquid filtration | |
| Sewn Industrial Filter Sock Bags Water Liquid Biodiesel WVO Oil Dust Fuel Diesel | $316.00 | 0.5 micron | 50 bags, Size #4 (4" x 14") | Fine liquid filtration with sewn seams | |
| Welded Industrial Filter Sock Bags Plastic Ring Flange Water Liquid Oil WVO Fuel | $327.83 | 0.5 micron | 50 bags, Size #4 (4" x 14") | Fine liquid filtration with welded seams | |
| High Flow 5 Micron Industrial Air Filter with Auto Drain & Metal Bowl | $73.99 | 5 micron | 1 unit, 3/4" NPT | Compressed air line moisture/debris removal |
Decision matrix
- Choose the 1 Micron Filter Sock Bag when you need one extra-fine bag for a liquid and you want to keep the upfront cost low.
- Choose the Sewn Industrial Filter Sock Bags when you want a 50-bag lot at 0.5 micron and sewn construction is fine for your fluid.
- Choose the Welded Industrial Filter Sock Bags when you want the same 50-bag format but with welded seams, no needle holes, and a plastic flange with handles.
- Choose the High Flow 5 Micron Air Filter when you need an in-line filter for compressed air with a metal bowl and auto drain.
Product notes
Industrial filter bag, 1 Micron Filter Sock Bags, Water Liquid Oil Dust Fuel-1um
At $19.99, this is the single-unit entry into 1-micron liquid filtration. It is a PE filter sock made for water, ethanol, methanol, oil, dust, and fuel, with a 7" non-corrosive metal ring and a round-bottom welded-and-sewn construction. The 18" length and 1-micron rating make it a good choice for extra-fine filtration when you need only one bag for testing or a small batch. It is built to handle temperatures from subzero to 300°F. The main limitation is quantity: this is a unit of one, so it does not provide the change-out supply of a 50-bag lot. If your process runs continuously or needs multiple filters at once, the 50-count sets will be more practical.
Sewn Industrial Filter Sock Bags Water Liquid Biodiesel WVO Oil Dust Fuel Diesel
The sewn set from Duda Energy is a 50-bag lot at $316.00. Each Size #4 bag measures 4" x 14" and has a 0.5-micron rating, which is finer than the 1-micron single bag. It is designed for filtering any liquid, and the title points to water, biodiesel, WVO, oil, dust, fuel, and diesel. For a shop that changes filter bags regularly, a 50-bag lot gives you a usable supply without reordering as often. The main tradeoff is sewn construction: if needle holes or thread contamination are a concern in your fluid, you may prefer a welded bag. Otherwise, this lot offers the same micron rating as the welded set at a lower price.
Welded Industrial Filter Sock Bags Plastic Ring Flange Water Liquid Oil WVO Fuel
The welded set costs $327.83 and is the highest-priced option here, but it addresses the limitations of sewn bags. It includes 50 Size #4 bags in the same 4" x 14" size and 0.5-micron rating. The welded seams are precision-bonded, with no needle holes and no thread contamination, and the fused edges are designed to reduce fiber migration into the fluid. Each bag has a durable plastic flange with handles, which makes removal from a filter bag housing easier. If your filtration process is sensitive to fibers or threads, this is the set to compare against the sewn version. The limitation is the price premium over the sewn 50-pack, for the same count and micron rating.
High Flow 5 Micron Industrial Air Filter with Auto Drain & Metal Bowl
Unlike the liquid filter bags, this 5-micron unit is made for compressed air line systems. It is a high-flow particulate filter with a metal bowl, auto drain, and 3/4" NPT connections, and it is described as compatible with commercial and industrial HVAC systems as well as some air-related devices. The metal bowl and auto drain are practical for removing liquid and debris from compressed air, which can help extend the life of tools and compressor accessories. The max temperature is 140°F. It is sold as one unit, and the 5-micron rating is coarser than the 0.5-micron and 1-micron liquid bags, so it is not designed for fine liquid filtration.
Final recommendation by use case
- If you want a single 1-micron filter bag for a liquid application, go with the Industrial filter bag, 1 Micron Filter Sock Bags.
- If you want a sewn 50-pack at 0.5 micron, choose the Sewn Industrial Filter Sock Bags.
- If welded seams and a plastic flange matter more to you, pick the Welded Industrial Filter Sock Bags.
- If you need compressed air line filtration with auto drain and a metal bowl, opt for the High Flow 5 Micron Industrial Air Filter.
