Motor Actuated Rotary Distributors (MARD)

MARD provides…

• Uniform distribution of wastewater over filter media
• 10:1 rotational speed control of distributor
• Ability to control speed of distributor for media flushing
• Low maintenance
• Corrosion resistant aluminum construction

Features:

• No mechanical seal
• Aluminum construction
• Motor actuated with a VFD
• 2 or 4 arm construction
• Mast mounted bearing
• Large non-clogging distribution orifices

Benefits:

• Low maintenance
• Eliminates replacement
• Corrosion resistance
• Control of distributor speed
• Media flushing by slowing distributor
• Wider flushing intensity range
  Reduced cost
• Eliminates potential of flooding bearing.
• Reduced maintenance

Wastewater flows into the MARD unit through a central located inlet pipe and over a stationary weir into a rotating tub assembly.  The depth of water in the rotating tub will force the water out into the distribution arms.  Large non-clogging orifices on the top side of the arms distribute the wastewater proportionally along the length of the arm.  Wastewater flows off of the back of the arms onto the filter media.  The drive motor is connected to a VFD to control the distributor speed.  64 units have been supplied since 1990.  Installations range from 14 feet (4.3 m) to 175 feet (53.3 m) diameter.  Installation flow ranges from 28 gpm (6 m³/hr) to 45,000 gpm (10,225 m³/hr).

Learn more from our Hi-Gard and MARD Brochure.