PETRO-BARRIER™ PTB-DF-24 Internal coarse particle prefilter for PTB-24


The PETRO-BARRIER™ PTB-DF-24 is a prefilter placed at the top of the PETRO-BARRIER™ POMPE to trap impurities present in filtered water from the retention tanks and pits of large transformers. This system minimizes the risk of clogging and helps keep the system running smoothly.




The PETRO-BARRIER™ PTB-DF-24 is a prefilter that fits onto cartridges in the SPI®  PETRO BARRIER™ POMPE range. Invented by SPI® in the 1990s, it completes the filtration system of PETRO-BARRIER filters, which are easily adapted to all types of retention tanks and pits. It helps to ensure continuous filtration of drainage water, while trapping harmful hydrocarbons. It prevents soil pollution in compliance with EN 858-1 and the French Water Act, with a discharge rate of less than 5ppm. It also complies with paragraph 471 of NF C13-200 (“All precautions must be taken to ensure that the recovery tank does not fill with water or that water is evacuated“). Our filters and pre-filters are regularly tested in independent laboratories, when new, in half-life conditions and after their recommended period of use (see Additional Information tab).


Placed at the top of the PETRO-BARRIER™ POMPE PTB-24 in the inlet chamber, it serves as the first water-cleaning prefilter before the PTB-SF-24 and before coming into contact with the active material in the PTB-C-24 filter cartridge. The pre-filter is essential to limit the risk of filter cartridge clogging caused by large particles and impurities in the water (stones, leaves, twigs, etc.).


PETRO-BARRIER™ PTB-DF-24 description:

  • Composed of several sets of filtering grids and foams, with different mesh thicknesses to block impurities in the water.
  • Diameter: 61 cm / Height: 15 cm / Weight: 1 kg


For over 30 years, SPI filters have been recognized for their high reliability, extreme robustness and longevity, even under the most difficult conditions: resistance to hot transformer oils (>100°C), water emulsified with dielectric oil, high resistance to ultra-violet rays and thermal amplitudes, etc. SPI has ISO 9001 quality certification for its production process, and integrates an eco-design approach aimed at reducing the quantity of materials and CO2 during the manufacturing process.

Accessories and options

The PETRO BARRIER™ POMPE PTB-24 is the complete system ready for connection on site – excluding the pump and its prefilter.


The PETRO BARRIER™ range includes several filter, prefilter and pump references to equip the PETRO-BARRIER™ POMPE PTB-24 :

  • Active ingredient filter: PETRO-BARRIER™ PTB-C-24
  • Small-particle internal prefilter: PETRO-BARRIER™ PTB-SF-24
  • Small-particle external prefilter: PETRO-BARRIER™ PFE-MP
  • Pump pre-filtration cage: PETRO-BARRIER™ PFE-PUMP
  • Standard 220V pump: PETRO-BARRIER™ PUMP-PTB
  • 5” inlet pipe: PETRO-BARRIER™ IN-P-1.5
  • 2” overflow pipe : PETRO-BARRIER™ OVR-P-2
  • 4” outlet pipe: PETRO-BARRIER™ OUT-P-4


For special volumes or flow rates, please consult us. There are many alternatives:

  • DOUBLE PTB on single pump


Contact us for more information.

Technical data

Additional information

Weight 1 kg
Dimensions 61 × 15 cm
Conditions of use


Use and maintenance

All industrial equipment or storage units containing hydrocarbons must be fitted with retention tanks.


Installing the PETRO BARRIER PTB-DF-24:

  • Internal and external pre-filters are simply fitted and removed through the opening in the PETRO BARRIER POMPE top cover.



  • SPI filters are sensitive to sludge and impurities carried by the water, which can considerably reduce flow or even block the filter. Good pre-filtration is therefore essential to protect the filter inlet, and must be checked regularly. The pre-filter should be washed with clean water as often as required by the site of use, the frequency of rinsing depending on the quantity of impurities carried to each drainage point.
  • To keep track of your filters and replacement schedules, SPI products feature a batch serial number corresponding to the batch of active ingredient tested and validated by the manufacturer. So you too can trace your filters and recommended replacement dates by simple visual inspection.
  • At end-of-life, the filter and pre-filter should be disposed of as conventional hydrocarbon waste under code [150202*].


For your specific needs in terms of traceability and automatic reminders of your maintenance dates, SANERGRID® can set up unit tracking for you, in return for a maintenance contract with one of our national partners.

Additional information

As part of the SPI® filter technology, the PETRO-BARRIER®  range is the European benchmark for hydrocarbon-contaminated rainwater filter cartridges for small-volume retention. It is the only filter on the market to have been validated for over 30 years by leading French and European industrial companies (EDF, ENEDIS, SNCF, SCHNEIDER, RTE, ABB HITACHI, SIEMENS, IBERDROLA, NATURGY, REE, EDP, ENEL, IREN, TERNA, E-ON, RWE, VATTENFALL, ELIA, ESB, SCOTTISH POWER, NATIONAL GRID, NETWORK RAIL, UK PN, BRITISH PETROLEUM, TOTAL ENERGIE, BASF, BAYER, ELES, CERN, ITER, VOLVO, DEUTSCHE BAHN, ADIF, SNCB, REPSOL, etc… non-exhaustive list).

Rainwater drainage and hydrocarbon pollution: thanks to the SPI anti-hydrocarbons filter system, the tank is empty of water most of the time, ready to receive hydrocarbons. In compliance with water legislation, the water discharged from the tanks is not contaminated with more than 5 ppm of hydrocarbons, in accordance with standard EN 858-1 (“light liquid separation plants”).

SPI filters® PETRO BARRIER are regularly tested in independent laboratories: SANERGRID Bureau Veritas report COFRAC certified I.D.: 003606/2776443/1/1/1 in 2015 (France), SPI Phoenix laboratory reports I.D.: AR67044 from 2002, 2004, 2005, 2009, 2018, 2022 (USA), TÜV report Nr 2432974 in 2016 (Germany), NUA report -Z-11895-1/1-2016.


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