Oil Water Separators

OS – Oil Water Separator Above Ground Tank

Coated A36 Steel Oil Water Separator

OS Series - Efficient, Reliable Oil-Water Separation

Pan America Environmental, Inc. OS Series remove free and dispersed oils, fuels, and petroleum products from wastewater with API 421-compliant performance. Built tough for industrial use.

OS Product Overview

The Pan America Environmental, Inc. OS Series is a family of above-ground, coated carbon, stainless steel and polypropylene coalescing oil water separators designed for reliable, gravity-based separation of oils from industrial wastewater streams.

Engineered to API 421 standards, the OS series effectively handles oils, fuels, and many petroleum-derived products while managing solids. It delivers clean effluent suitable for sewer discharge or further treatment. Available in a wide range of flow rates (typically 5–5000+ GPM), it scales to your application.

Key Features & Benefits

• API 421 Compliant Design — Proven gravity separation performance targeting 10 mg/L or less oil droplets (30 micron and larger).
• Coated A36 Carbon Steel Construction — Durable, corrosion-resistant coating for long service life in demanding environments.
• Flopak Coalescing Media — High-efficiency corrugated plate media maximizes oil droplet coalescence for superior separation.
• Solids Handling Capability — Integrated design manages solids alongside oil separation.
• Horizontal Flow Path — Optimized flow ensures oils rise and coalesce effectively while water passes through.
• Above-Ground Installation — Easy access for maintenance, inspection, and cleaning—no excavation required.
• Custom Configurations — Available with various options including skimmers, level controls, pumps, heaters, and automation.
• Low Maintenance — Simple, passive operation with minimal moving parts.
• Scalable Models — From compact units for smaller flows to large systems for high-volume applications.

How the OS Model Works

1. Influent Entry — Oil- and solids-laden wastewater enters the separator.
2. Flow Distribution — The design calms and distributes flow evenly toward the plate pack.
3. Coalescing Process — Wastewater flows horizontally through the Flopak corrugated media. Oil droplets attach to the plate surfaces, coalesce into larger droplets, and rise to the surface for collection.
4. Separation — Clean water exits from the end outlet while separated oil is collected via skimmer and gravity decants
5. Effluent Discharge — Treated water meets regulatory requirements for discharge or downstream processing.

The passive, gravity-based system requires no chemicals or power for core separation (optional equipment may need power).

Technical Specifications (Typical)

Model: OS Series     Flow Rate Range: 5-5000+ GPM     Material: Coated A36 Steel     Media Type: Flopak Coalescing Plates

Standard Features: Oil skimmer, solids hopper, adjustable water weir inlet/outlet flanges

• Effluent Quality: Typically ≤ 10 mg/L free & dispersed oil (30-micron droplets)
• Temperature Range: Designed for standard industrial wastewater temps (custom options available)
• Options: Stainless steel construction, flat bottom (FB), hopper bottom, automation packages, rental units, pump systems, freeze protection, much more

Exact specifications vary by model and custom requirements. Contact us for detailed sizing based on your flow, oil type, and concentration.

Why Choose Pan America Environmental?

• 35 years of expertise in wastewater treatment equipment
• American-made quality and support
• Comprehensive range of separator styles (steel, stainless, API, etc.)
• Rental options available for temporary needs or testing
• Full system integration support (pumps, controls, DAF, etc.)

Ready to Separate Oil from Water Efficiently?

Let our team size the perfect OS Series separator for your application. Contact us today for a custom quote.

Industrial Applications

Ideal For:

• Manufacturing & machining facilities
• Automotive & transportation wash systems
• Refineries & petrochemical plants (refinery wastewater, stripped sour water)
• Natural gas processing, coke-making and gasification plants
• Stormwater runoff treatment
• Equipment maintenance shops
• Food processing (where applicable)
• Industrial process water
• Vehicle/equipment wash bays
• Groundwater remediation
• Power generation
• Marine & ports
• Metalworking

Need replacement media? We supply replacement coalescing media packs for Pan America separators and many other brands, plus concrete tank retrofits. Replacement & retrofit media · Media pack builder · Parts & media