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Above Ground • Below Ground • Hopper • Modular Packs

 

Below Ground Oil Water Separators

 

 

Our efficient, environmentally-smart below ground separators meet pretreatment SPCC and NPDES permits for local communities.  Our separators address the following problems:

• Storm water runoff
• Spill containment
• Vehicle maintenance shops
• Washing operations (see our preferred treatment for this application)

Design

Hydro Quip Inc.’s design meets and exceeds API 421, which is based on Stokes Law.  However, API does NOT address the importance of a Reynolds Number.  Since Stokes Law is based on zero velocity, a low Reynolds Number is required to achieve the rise times of the oil for better separation.  We use the flow rate, temperature, type of product and particle size to achieve superior performance results.  Design calculations can be provided which indicate that at the calculated overflow rate, the oil water separator is equipped with the required projected plate surface area to achieve the specified performance under laminar flow conditions.  All calculations can be provided by a registered professional engineer.  Calculations take into account:

• The potential surge
• A Reynolds Number less than 500
• Particle characteristics
• Temperature
• pH of the water

Performance Standards

• Design utilizes patented, revolutionary, non- plugging coalescing plates with 132 square feet per cubic foot of usable surface area that will remove a 20 micron droplet
• Will not need to use secondary polishing packs
• Will achieve a discharge of 5ppm or less in accordance with CEN EN 858-1
• Several companies meet UL2215 standards.  But, only a few of us meet CEN EN 858-1

Construction Standards

• Construction in accordance with UL58
• Corrosion protection in accordance with UL1746, FRP, STi P3 or urethane
• Single wall or double wall construction with interstitial space for leak detection
• Meets NFPA 30 local requirements

Options Available

• HQB: Below grade with H2O rated access cover
• HQA: Above grade access
• Models with Grit chamber for solids removal prior to coalescing compartment
• Models with effluent pump out chamber after coalescing compartment
• Models with oil stop valve to retain lighter liquids from leaving separator
• Models with customized packages (pumps, controls, leak detection and level indicating systems)

Operation Maintenance

• All models can be serviced from grade level
• No confined spaces
• Plates easily removed, washed down and put back in place
• Solids can be pumped out through large access opening from grade level

 

Hydro Quip Inc.       108 Pond Street       Seekonk, MA 02771       (508) 399-5771       Fax: (508) 399-5352       HQIOWS@aol.com