Choosing filtration-separation equipment starts with a basic question: what is contaminating what? If your cutting fluid has a layer of floating oil, you need an oil-water separator. If your fuel, water, or oil has suspended solids, you need a filter, centrifuge, or both. The four products here take three different routes, and the price span is wide enough that a hasty buy can undercut your actual needs. Here is how to match each to a specific job.
Quick take
The TECHTONGDA industrial centrifuge is the only centrifuge in this group, with a 50 kg capacity, 660 r/min drum speed, and stainless-steel construction. The Duda Energy welded filter socks are the lowest-priced option in the set and offer 0.5 micron filtration, but they are consumables: 50 bags, Size #4, with plastic ring flanges. The two oil-water separators-one from Maisutseb and one from TECHTONGDA-are functionally close: both are listed for 208-240V three-phase power, both carry the same model number m057094, and both are identically priced.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| Industrial Centrifuge Dehydrator Biomass Oil Extraction Solid-Liquid Separator | USD 4,646.00 | |
| 208-240V 3-Phase Industrial Oil-Water Separator Oil Skimmer for Cutting Fluid | USD 1,886.00 | |
| 208-240V Industrial Cutting Fluid Oil-Water Separator Oil Skimmer 3-Phase | USD 1,886.00 | |
| Welded Industrial Filter Sock Bags Plastic Ring Flange Water Liquid Oil WVO Fuel | USD 327.83 |
The spread between the least expensive and most expensive listed options is $4,318.17.
Decision matrix
| Product | Best for | One limitation |
|---|---|---|
| TECHTONGDA Industrial Centrifuge Dehydrator | Pulling solids and moisture from industrial oils when a high-capacity powered machine is justified | Listed for 220V three-phase power and semi-automatic |
| Maisutseb 208-240V Oil-Water Separator | Removing floating oil from cutting fluid in machine-tool sumps | Listed for 208-240V three-phase power |
| TECHTONGDA 208-240V Oil-Water Separator | Same floating-oil removal job with the same model number | Same three-phase power specification and very similar listing |
| Duda Energy Welded Filter Socks | Catching fine particles in water, fuel, or oil across a 50-bag lot | Filter media rather than a powered machine |
Product notes
Industrial Centrifuge Dehydrator Biomass Oil Extraction Solid-Liquid Separator
This TECHTONGDA unit is the heavy lift in this group. The stainless-steel barrel resists corrosion and rust, and the 660 r/min drum speed provides a strong spin for dehydrating and degreasing metal parts, filings, and liquids. It lists a 50 kg max capacity and a 580mm rotating hub, and a foot switch handles unloading. The reason to choose it is high-volume solids removal. The limitation is operational: it is listed for 220V three-phase power, is semi-automatic, and has a 6mm filter hole diameter, so it is not a fine-polishing filtration solution. It also cannot be used to dry clothes, per its own description, so keep it in the shop.
208-240V 3-Phase Industrial Oil-Water Separator Oil Skimmer for Cutting Fluid
This Maisutseb separator is designed for a specific nuisance: oil floating on cutting fluid. The description says it separates floating oil from cutting fluid, extends cutting fluid life, and preserves tool life. It also recovers the separated oil for reuse and has a cleaning valve for sludge. The reason to choose it is straightforward oil removal from a machine-tool sump. The limiting factor is the listed power spec: 208-240V three-phase, so shops with single-phase service will need to look at the filter sock option or a different separator. The quick oil recovery and wide application range make it a convenient fit if the power matches.
208-240V Industrial Cutting Fluid Oil-Water Separator Oil Skimmer 3-Phase
This is the TECHTONGDA-labeled version of the same model number m057094. Like the Maisutseb unit, it is described as separating floating oil from cutting fluid to extend fluid and tool life, and it includes the same oil-recovery and cleaning-valve features. The reason to consider this listing is if you want the same separator under the TECHTONGDA name with a different GTIN/UPC. The limitation is that the visible difference is mainly the TECHTONGDA label and the GTIN/UPC number; the three-phase power specification remains, so the setup still needs a 208-240V three-phase feed.
Welded Industrial Filter Sock Bags Plastic Ring Flange Water Liquid Oil WVO Fuel
Duda Energy's welded filter socks are a completely different approach. The lot includes 50 bags in Size #4, 4" x 14", with a 0.5 micron rating, and the welded seams avoid needle holes and thread contamination. The plastic ring flange with handles makes removal from a filter bag housing easier. The reason to choose them is fine-particle filtration for liquids like water, oil, WVO, and fuel without a powered machine. The limitation is that they are filter media rather than a powered machine, so the filtration work happens at the sock surface and the bags are meant for use inside a filter bag housing.
Final recommendation by use case
- If you need to pull solids and moisture from large batches of oil and metal chips, the TECHTONGDA centrifuge is the machine built for that job.
- If your main problem is floating oil in cutting fluid and you have three-phase power, either oil-water separator will do the job; choose the listing with the brand and GTIN you prefer.
- If you want the lowest-priced starting point, need 0.5 micron filtration, or have single-phase power, the Duda Energy welded filter socks are the workable choice.
