Treater: Makes pipelline quality oil. A treater primarily designed to remove impurities and contaminants from crude oil, such as water, anysalts which can be dissolved in water. This process ensures the oil meets quality standards for transportation. Treaters are meant for emulsons of up to 30% water. Any water in excess of that amount should be considered “free” water and can typically be knocked out in an upstream separator usually called a Free Water KnockOut or FWKO.
Separator: Is used to separate mixtures at higher pressures of 125 through to 1440 psig such as oil, gas, and water and sometimes solids too. It works on the principle of density differences, allowing the components to separate based on their weight.
Below we’ll discuss more specifics regarding treaters and separators, supplied by Oilpro Oilfield Production Equipment. You’ll also see links to both inventory pages on our OilPro.ca website.
Treaters From OilPro

Treaters are a particular strength for OilPro Oilfield Production Equipment and we specifically stock treaters from Sivalls.
Vertical treaters are versatile pieces of equipment that can be used for various 27 API or lighter crude oil.They incorporate firetubes to obtain an optimal temperature for efficient separation without boiling off light ends on the oil. The bottom section collects water and contaminants, which can be regularly removed every dump cycle.
By stocking Sivalls’ equipment, OilPro ensures your treater works for your application. Sivalls manufactures treaters since 1947 and is recognized as a proven industry leader in this field.
Chemicals are injected to enhance most separation processes. These pressure vessels use gravity and chemicals to separate impurities from crude oil and make disposal quality water.
OilPro’s current treaters inventory can be viewed here: OilPro Treaters
Separators From OilPro

OilPro specializes in separators, offering custom-built units with flexible design options. These separators can handle two-phase or three-phase separation, accommodate slugs, and include features like stab-in controls, external cages, ESDs, and export crating.
Our standard separator inventory includes vertical units up to 36″ in diameter, available in both sweet and sour NACE-compliant designs. Horizontal units range from 36″ to 96″, and we typically stock ANSI ratings up to 600 (1480 psig). We also offer custom sizes and pressure ratings with expedited delivery using our pre-registered vessel designs.
OilPro specializes in hyper efficient, high turn-down, ultra low pressure drop liquid-gas separators by Innopipe. Innopipe separators are specifically designed for gas transmission lines.

Need a replacement for a failed piece of equipment? Contact us, and we’ll build you an exact duplicate.
OilPro’s current separator inventory can be viewed here: OilPro Separators
Summary
OilPro is a trusted supplier of innovative, pre-engineered production equipment to the energy industry since 1997. Our experience in sourcing, sizing, and supplying equipment to producers of all sizes ensures our products meet industry standards.
We partner with established fabricators to build high-quality, semi-custom power, separation, and artificial lift equipment, delivering fast, affordable, and reliable solutions for production.
You can view OilPro’s global oilfield capabilities by visiting us at OilPro.ca.
Click here to view OilPro’s current treater inventory and full oilfield capabilities.
You can also see our inventory of separators by clicking here.