Sump Tanks

About Sump Tanks

WHAT IS A SUMP TANK?

A Sump Tank is an industrial storage tank or pit used to collect, settle, and temporarily store liquids, such as coolant, slurry, wastewater, oil-water mix, or filtrate, before they are pumped, filtered, or recirculated. It plays a key role in liquid handling and coolant recovery systems.

WORKING PRINCIPLE

• Liquid (e.g., dirty coolant, water, slurry) flows by gravity into the sump tank.
• The tank allows heavier particles to settle (sedimentation zone).
• Liquid may pass through baffles, strainers, or mesh filters.
• Cleaned or semi-cleaned fluid is pumped out using a submerged or external pump.
• Oil skimmer or filter units can be mounted to further separate oil and solid impurities.

 TYPES OF SUMP TANKS

TECHNICAL SPECIFICATIONS

APPLICATIONS

Machine Tool Industry:

• Coolant collection from CNC/VMC machines
• Dirty coolant holding before filtration

ETP/STP and Industrial Wastewater:

• Sludge and wastewater collection
• Sedimentation and equalization tank

Process Plants:

• Buffer tank for pumping or circulation
• Intermediate tank in fluid transfer lines

 Oil Separation:

• Part of oil-water separator skid
• Integrated with oil skimmer or magnetic separator

• Simple, durable construction
• Easy to customize based on plant layout
• Acts as a primary filtration and sedimentation zone
• Integrates easily with pumps, filters, skimmers, agitators
• Helps maintain continuous machine operation by collecting overflow

LIMITATIONS

• Sediment buildup requires periodic cleaning
• May require space below floor (if underground)
• Needs proper material selection for corrosive liquids

SELECTION CHECKLIST

TYPICAL SCOPE OF SUPPLY

• Sump tank body with inlet/outlet ports
• Internal baffles, mesh filters, drain valve
• Top cover with inspection hatch
• Mounting for:Pump (submerged or mounted)Oil skimmerLevel sensorOverflow connection
• Optional trolley or support legs