Underground HDPE Oil/ Water Separators

HDPE separators are constructed to remove hydrocarbons with a specific gravity up to 0.95 through the use of an enhanced oleophilic coalescer pack system. Oil/water separator designs vary based on required effluent quality and flow rates. An effluent quality of 10 parts per million (10ppm) is typical but the difference between continuous flow and intermittent flow will drastically alter the coalescer pack sequence. Additionally, the concentrations and types of contaminants determines the allowable flow rate through the system. Since these detergents may adversely affect the performance of oil/water separators, quick break detergents must be used if applicable. For more information on various flow applications and applicable products, please contact your sales representative.

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Underground HDPE Oil/ Water Separators 2

Oil drippings and spills from parking lots, driveways, oil terminals and other vehicular traffic surfaces are being washed into our water supplies by rainwater, creating serious environmental concerns. HDPE OWS provides a full range of dependable products for the oil/water separator industry. HDPE separators are constructed to remove hydrocarbons with a specific gravity up to 0.95 through the use of an enhanced oleophilic coalescer pack system. Oil/water separator designs vary based on required effluent quality and flow rates. An effluent quality of 10 parts per million (10ppm) is typical but the difference between continuous flow and intermittent flow will drastically alter the coalescer pack sequence. Additionally, the concentrations and types of contaminants determines the allowable flow rate through the system. Since these detergents may adversely affect the performance of oil/water separators, quick break detergents must be used if applicable. For more information on various flow applications and applicable products, please contact your sales representative.

Our underground separators utilize the same HDPE manufacturing technology the petroleum industry relies on for environmental protection. The inherently non-corrosive properties of HDPE provide the most compatible option for your separator application, built by one of the most trusted brands in the world. Our HDPE separators are buried and filled with water. Each separator includes a combination of baffles and coalescer packs, based on effluent requirements, to accelerate separation. Waste water enters through the inlet and gravity naturally settles heavier solids to the bottom of the tank as the oil floats to the top of the water level. The oily water then passes through the coalescing plates in a straight flow or cross flow direction depending on the tank model. The configuration of the packs efficiently coalesces or joins oil droplets together forming larger masses of oil that rise to the surface where it accumulates and can be removed. Gravity displacement discharges the effluent though the outlet at a lower point in the tank chamber. Separator systems can also be equipped with drop boxes, electronic monitoring with high oil level alarms and control panels, and oil stop valves.

Performance claims

• HDPE construction provides corrosion resistance without coatings or protection systems.

• Enhanced coalescer system is comprised of oleophilic plates to maximize separation and minimize maintenance.

• Removable plates simplifies routine cleaning.

• All tanks are built to the stringent performance requirements of GB standard.

• Removes free floating oils and settleable solids for oil/water mixtures to achieve10ppm effluent quality (or 15 ppm if specified).

Design and Sizing

Since each site is unique, the most effective approach is to analyze each situation and design the system accordingly.

Our engineering staff can help determine the best fit for your technical considerations and site specific needs.

The major design parameters include:

• Inlet flow rates

• Inlet/outlet concentration

• Effluent quality

• Oil spill capacity

• Oil storage capacity

• Temperature

• Specific gravity of contaminants

Our separators are sized primarily on flow rates. A complete list of flow rate plate pack options are available, contact your sales representative for more information.

Why Choose Our Underground HDPE Oil/Water Separators

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A. Double-Wall Separator

Underground HDPE Oil/ Water Separators 7

B. HDPE Manway Extension

C. Oil Draw Pipe

D. Hydrostatic Reservoir

E. Tank Sump

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F. Cross flow Baffle

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G. Coalescer Plate Packs

H.Oil Stop Valve

I. Anchor Straps

J. Deadman Anchor System

Underground HDPE Oil/Water Separators Parameters

Underground Standard Tank(QOS-10&QOS-15 models)
	Nominal capacity (gallons)	Flow rate (gpm)	Oil storage capacity (gallons)	Oil spill capacity (gallons)	Inlet / outlet (sizes)	Nominal length		Nominalweight(Lbs)
	Nominal capacity (gallons)	Flow rate (gpm)	Oil storage capacity (gallons)	Oil spill capacity (gallons)	Inlet / outlet (sizes)	Single-Wall	Double-Wall	Single-Wall	Double-Wall
t.Di 4	550	55	110	440	4 in.	9ft.8in.	9ft.9in.	425	900
	1,000	100	200	800	4 in.	11ft.	11ft.1in.	500	1,050
	1,500	150	300	1,200	4in.	16ft.10 in.	16ft.11in.	750	1,275
6.Dia.	2,000	200	400	1,600	6 in.	13ft10 in.	13ft.8 in.	1,000	2,275
	3,000	300	600	2,400	6 in.	16ft.	16ft.9 in.	1,075	2,750
	4,000	400	800	3,200	6 in.	19ft.8in.	19ft.9 in.	1,475	2,975
	5,000	500	1,000	4,000	8 in.	24ft.8in.	25ft.	1,800	3,475
	6,000	600	1,200	4,800	8in.	29ft.6in.	30 ft.3 in.	2,100	3,900
8.Dia.	6,000	600	1,200	4,800	8 in.	19ft.5in.	19ft.6 in.	2,300	4,200
	7,000	700	1,400	5,600	8 in.	22ft.2in.	23ft.7 in.	2,650	4,675
	8,000	800	1,600	6,400	10 in.	24ft.11in.	26ft.4 in.	2,950	5,075
	9,000	900	1,800	7,200	10 in.	27ft.8in.	27ft.9in.	3,300	5,450
	10,000	1,000	2,000	8,000	10 in.	30 ft.5 in.	30 ft.6 in.	3,550	5,950
	12,000	1,200	2,400	9,600	10 in.	35ft.11 in.	36 ft.	4,375	7,000
	15,000	1,500	3,000	12,000	12 in.	44ft.5in.	44ft.6in.	5,350	8,650
10 ft.Dia.	20,000	2,000	4,000	16,000	14 in.	37ft.8 in.	37ft.9 in.	6,950	11,900
	25,000	2,500	5,000	20,000	16 in.	45ft.11 in.	46ft.	8,300	13,900
	30,000	3,000	6,000	24,000	16 in.	54ft.2 in.	54ft.3 in.	9,600	16,300
	40,000	4,000	8,000	32,000	20 in.	71ft.3 in.	71ft.4 in.	12,650	20,975