Filter Press Controls: Automatic Feed Pump Control System (AFPCS)

M.W. Watermark offers several options for filter press controls. Using the right controls for your particular filter press application is an important consideration to ensure your press is running at its peak efficiency – minimizing downtime and increasing the life of your equipment.

AFPCS: Filter Press Controls for Use with AOD Feed Pumps

The M.W. Watermark Automatic Feed Pump Control System (AFPCS) is used in conjunction with air-operated diaphragm (AOD) feed pumps to automatically increase the feed pump pressure during the filtration cycle. High initial feed pump pressures can build a very tightly packed, impermeable layer of solids on the filter cloth, restricting the flow of slurry, increasing filtration cycle times, and ultimately the density of the cake. Reduced initial feed pressure allows a soft layer of slurry particles to be deposited on the filter cloth. Because this layer becomes the filtering media, the filterability of the incoming slurry is enhanced.

Filter Press Controls: M.W. Watermark 1,000mm Filter Press with Automatic Feed Pump Control System (AFPCS)
M.W. Watermark 1,000mm Filter Press with Automatic Feed Pump Control System (AFPCS)
M.W. Watermark Filter Press Controls: AFPCS Pump Pressure Regulator and Pump Air Sensor
AFPCS Pump Pressure Regulator and Pump Air Sensor (click image to zoom)
M.W. Watermark Filter Press Controls: AFPCS Pump Pressure Regulator and Pump Air Sensor Mounted to a Feed Pump Skid
AFPCS Pump Pressure Regulator and Pump Air Sensor Mounted to a Feed Pump Skid

The AFPCS automatically increases the feed pressure in four stages throughout the fill cycle. These stages and pressures are fully adjustable to suit the type of slurry and the solids concentration. Cycle completion is determined either by adjustable times (feed by time) or by monitoring the feed pump flow sensor (feed by flow), located at the feed pump, during the final pressure stage.

The M.W. Watermark AFPCS also incorporates a low hydraulic pressure safety shut down device. If insufficient hydraulic clamping pressure is present, the AFPCS system will not start, or shuts down, eliminating possible leaking from between the filter plates and the potential to start the feed pump when the press is not fully closed and clamped. The AFPCS features power ON, START cycle and STOP cycle functions. The controller also indicates when the cycle is complete.

M.W. Watermark Filter Press Controls: Digitally Programmable AFPCS Controller
Digitally Programmable AFPCS Controller
M.W. Watermark Filter Press Controls: AFPCS Pump Pressure Regulator and Pump Air Sensor Kit
AFPCS Pump Pressure Regulator and Pump Air Sensor Kit

AFPCS Features

• Optional on New Filter Presses

• Retro-Fit to any Filter Press

• Feed by Flow or Time

• Digitally Programmable Controller

• Start, Stop and Cycle Complete

• Pre-wired and Tested

• Pump Air Pressure Regulator

• Pump Flow Sensor

• Cycle counter

• 16” x 16” x 8” NEMA 4 Enclosure

• 120VAC / 1Φ / 60 Hz / 1 Amp

Key Takeaways

Automatic Feed-Pump Controls allow your filter press to run at its optimum efficiency – creating dryer filter cakes, reducing disposal costs, reducing filtration time, and increasing the life of your filter cloths and feed pumps. Typical payback is less than one year.

Visit our Filter Press Controls webpage. 

Download our AFPCS overview document. 

Contact M.W. Watermark today to learn more about filter press controls and if an AFPCS is right for your dewatering project.

About M.W. Watermark

M.W. Watermark wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference in the water business, and as a result, make a positive difference to our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. We also specialize in rebuilding used water treatment equipment. Together, we can make a difference.

Product names, logos, brands, and other trademarks featured or referred to within this document are property of their respective trademark holders. These trademark holders are not affiliated with M.W. Watermark in any way.

Filter Press Controls: Automatic Feed Pump Control System (AFPCS)

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