The Wilden® Accu-Flo™Air Distribution System (ADS) for Air-Operated Double-Diaphragm (AODD) Pumps - Precise Electronic Control for Your Process

The Accu-Flo™ Air Distribution System (ADS) for use on Air-Operated Double-Diaphragm (AODD) Pumps gives you the critical external pump control necessary for exacting applications such as batching. Featuring a direct electrical interface that utilizes electrical impulses to stroke the pump instead of differential pressure, the Accu-Flo provides a variable stroke rate that you can easily control as needed. To meet your applications, it is available as NEMA 5, NEMA 7 or ATEX-compliant, and comes in a variety of voltage options.

The Accu-Flo excels in a wide variety of industrial applications such as:

  • Chemical
  • Paint & Coatings
  • Mining
  • Oil & Gas
  • Water & Wastewater
  • Liquid Terminals
  • Process
  • Semiconductor

When repairing or maintaining Wilden Air Distribution Systems (ADS), always use only authentic Wilden Air Kits to maintain optimal performance and preserve Wilden factory warranties.

This new Air Kit contains a reduced number of parts, eliminating the air valve assembly and muffler plate. All Air Kits now include the air valve spool and are available only in the Air Kit. They will not be sold separately. All Air Kits are vacuum-sealed to maintain parts integrity and cleanliness. Each Air Kit can be applied to many different models to significantly reduce the number of kits required to cover Wilden’s products and simplify ordering. See the Repair Kits Page for more information.

accu-flo

How It Works

The Accu-Flo Air Distribution System (ADS) employs a two-position, four-way solenoid valve that has a single operator and spring return. The valve is internally air-piloted for longer coil and operator life.

  1. Air pressure is utilized to fill air chambers and displace the diaphragms, but electrical impulses dictate the stroke rate.
  2. When the solenoid is unpowered, the air valve piston is held by a spring to the top of the air valve body.
  3. In this position, the air supply is directed to the right side of the pump while the left air chamber is exhausted.
  4. When the solenoid is powered by electricity, air pressure is routed to the top of the air valve piston, which overcomes the tension of the spring and forces the piston down.
  5. In this position, the air valve piston directs the air supply to the left side of the pump and exhausts the right side.
  6. By alternately applying and removing electrical power, the Accu-Flo pump reciprocates back and forth in a fashion similar to standard air-operated pumps.

The Accu-Flo ADS is utilized on the following Wilden pumps:

Advanced™ Series Bolted Plastic Pumps

SizePumps

1/2”

A100P - 13 mm (1/2”) Advanced Plastic Pump

1”

A200P - 25 mm (1") Advanced Plastic Pump

Original™ Series Clamped Metal Pumps

SizePumps

1/4”

A.025 - 6 mm (1/4” ) Original Metal Pump

1/2”

A1 - 13 mm (1/2”) Original Metal Pump

1”

A2 - 25 mm (1") Original Metal Pump

Original Series Clamped Plastic Pumps

SizePumps

1/4”

A.025 / A.025P - 6 mm (1/4”) Original Plastic Pump

1/2”

A1 & A1P - 13 mm (1/2") Original Plastic Pump

1”

A2 - 25 mm (1") Original Plastic Pump