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Clara LongBox (LB) Separator

Clara LongBox (LB) Separators are explicitly designed for efficient sediment, suspended solids and metals removal on stormwater treatment and dewatering projects and the treatment of process water, mine groundwater and wastewater. Available with tube settlers or inclined plates, Clara LB Separators provide excellent removal efficiencies compared to traditional weir tanks and settling or frac tanks commonly used for sediment treatment on unpaved sites and in heavier industrial applications.
A Newterra Clara longbox filtration unit in an industrial setting consisting of a yellow ladder and guardrail attached to the unit with a V shaped base running the length of the box with a rectangular box over it, riveted access panels can be seen at the base of the unit

Product Overview

Clara LB Separators target free oil, sediment, metals, floatables and trash. With their small footprint, the separators’ installation, setup and operation are fast and simple, even on uneven ground. And, they are easily transported on flat-bed trucks to sites and remote areas.


  • Pre-built & fully assembled
  • Multiple configurations with flow rates up to 2,500 GPM
  • Available as an insulated, self-contained system for cold-weather applications
  • Fast, simple on-site setup
  • Operates on non-level ground
  • Easy sludge monitoring and removal
  • Operator access platform for easy access and maximum safety
  • Durable carbon steel construction
  • Designed for easy shipping
  • Pilot testing available

Technical Specifications

Flexible Configurations

Clara LongBox Separators are available  in several  different configurations to address a wide range of flow rates,  sites and operational considerations:

SeriesLengthWidthHeightAdvantages & Shipping Notes
LBN4′ to 38′5’4″6’4″• Insulated for cold weather applications and fully enclosed for operation & maintenance within an ISO shipping container.
• Flatbed trailer
LBI4′ to 38′7’7″8’5″• Fits within an ISO shipping container for simplified international transport
• Flatbed trailer; configured for use with tilt and load trucks  for easy deployment
LB4′ to 40′7’10”9’8″• Drop deck trailer; configured for use with tilt & load trucks  for easy deployment
• No permits required
LBW8′ to 40′11′9’8″• High flow rate
• Drop deck trailer; no permits or escort required;
LBWT8′ to 48′10’8″11’4″• High flow rate
• Stretch double  drop trailer; permit required; no escort required
LBXWT16′ to 40′12’4″11’4″• High flow rate
• Stretch double  drop trailer; permit & escort required

Optional Features:

Insulated Separator:  Available as a stand-alone, cold-weather product where the tank is enclosed in rigid, insulated steel panels. Panels are removable, providing access to the top of the tank and equipment spaces around the separator. Heating can be incorporated for cold-weather applications.

Enclosed Top: Features hatches and removable sections to facilitate maintenance requirements.

Inclined-Plate Settlers: Standard equipment tube settling media can be replaced with optional flat inclined plates.

Open Gravity Separator: Available without settling media for applications with a high potential of plugging the settling media.Pilot Test Unit: Try before you buy. Employing a pilot test with a small-scale unit is a great way to see if Clara Separators are the right solution for your facility.

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