Find then Remove the Water From Your Fuel.

All diesel contains some percentage of water. The most important thing is to keep the water below its saturation point so that it stays dissolved rather than entering your equipment as free water.

Saturation points vary from roughly 50 ppm to 1800 ppm based on temperature and on the petro diesel/biodiesel ratio. When water content reaches the saturation point, the excess water will fall out as free water. Your diesel may hold 90 ppm dissolved water when warm, but only 60 ppm when it cools down due to colder weather. The 30 ppm difference falls out as free water and settles to the bottom of the tank.

Knowing the water content is important.

See Fuel Test Kits



Fuel Water Removal Facts

Equipment manufacturers specify that ZERO free water must reach the engine.

Are you protecting a $20,000 – $250,000 engine with a $20 paper filter?

Zero water is not realistic.

Water in your tank may grow bacteria. Bacterial may cause tank corrosion. Bacteria will plug filters and shorten engine life.

So letting water enter the engine is a death sentence for at least the injectors and possibly pistons and cylinder walls.

Before and After Water Removal and Coalescer Purification

Diesel Fuel Pre-Filter Coalescer Separator – Purifiers.

We remove 99% of water and solids to ISO Cleanliness Code of 17/15 with no filter element.

This purifier-separator is based on surface tension principle. Since diesel and water have different surface tension as well as density, when a mixture of diesel and water is spread over a large area water droplets and large solids will separate from the fuel.

In fuel water separation, the larger the surface area the better. Dieselcraft separators are engineered for maximum “residence time” based on flow rate. Residence time is a broadly useful concept that expresses how fast something moves through a system in equilibrium. The longer the residence time the better the cleaning.

Dieselcraft utilizes matched flow rate to surface area and a proprietary media to get the water to agglomerate and drop out of the fuel.

If a purifier is not matched to the fuel flow you get nothing but more bad fuel and the problem is not solved

All Dieselcraft Purifier designs undergo velocity magnitude simulations to assure performance.

All purifiers are supplied with a water sensors and the needed mounting hardware.

See the Lab Test Results

Model # is size in inchesMaximum Flow RateData Sheet & Drawings
5 x 8 x .500
For Engines Less than 200 HP
72 GPH / 270 LPHDownload Spec Sheet
5 x 12 x 1
For Engines 200 to 650 HP
180 GPH / 690 LPH Download Spec Sheet
5 x 16 x1
Optimum performance for engines from 400 to 1,200 HP if space allows
240 GPH / 907 LPHDownload Spec Sheet
5 x 24 x 1
Fuel Polishing or for engines from 400 to 1,200 HP if space allows
420 GPH / 1587 LPHDownload Spec Sheet
5 x 32 x 1
Fuel Polishing or Fuel Transfer Applications
480GPH / 1814 LPHDownload Spec Sheet
8 x 20 x 2
Fuel Polishing or Fuel Transfer Applications
1200 GPH / 4536 LPHDownload Spec Sheet
8 x 51 x 2
Fuel Polishing or Fuel Transfer Applications
2400 GPH / 9072 LPHDownload Spec Sheet
18 x 56 x 3
For Fuel Transfer Applications
100 gallons per minute/ 378 LPMDownload Spec Sheet
18 x74 x 4
For Fuel Transfer Applications
200 gallons per minute/ 756 LPMDownload Spec Sheet

Water Separator-Coalescer Purifiers are sized based on engine horse power and pump flow rates.

Call us for help and prices.

Example of a storage tank system. 500 Gallons Per Hour Model FPS-24-7

This tank cleaning system is designed to be mounted next to your storage tank and to run 24 hours per day 7 days a week.

This will keep 99.5% of the water and solids out of the tank with NO FILTERS


Need a pump?

7 GPM Transfer 120 Volt
Heavy Duty for continuous operation with our 5×32 Pre-Filter Purifier

30 GPM Transfer 120 Volt
Heavy Duty for continuous operation with our 8 inch Pre-Filters

12 GPM 12 Volt.
The best 12 volt pump on the market.
30 Minute Duty Cycle