The Pan America Environmental API series is a family of API421 based steel, above grade, flat or hopper bottomed gravity oil water separator designs that can be applied to many applications where oils, fuels, crudes, solids and many petroleum derived products are present.


  • Proven reliability
  • Design follows API 421 criteria for sizing and performance
  • Flow rates from 5 to 5000 GPM
  • Construction: Coated carbon steel,  304/316 SS, polypropylene/polyethylene
  • Many possible integrated options
  • Highly customizable design
  • Low profile height

Process Overview

The API design is most commonly used wherever crudes, oils, fuels and solids can come into contact with a wastestream and is designed for high solids applications

How It Works

The API provides a prescribed calculated length, width, depth and tank volume to create a particular range of cross-sectional  velocity to promote gravity separation based on the flow and the oil’s size and API density. Solids that equal or exceed the oils size and density will also be separated under the same design logic under settling conditions.


Ideal For:

  • Groundwater Remediation
  • Refineries
  • Vehicle Wash Racks
  • Military Wash Racks
  • Industrial Process Water
  • Steel Mills
  • Stormwater Treatment
  • Shipping Ballast & bilge water treatment.
  • Tank Farms
  • Petro-Chemical
  • Power Generation
  • Heat Treating

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