AP-75-MBV 3/4" AccuPurge Automatic Valve For SandMaster (110 or 220 VAC)
AP-75-MBV 3/4" AccuPurge Automatic Valve For SandMaster (110 or 220 VAC)
AP-75-MBV 3/4" AccuPurge Automatic Valve For SandMaster (110 or 220 VAC)

AP-75-MBV 3/4" AccuPurge Automatic Valve For SandMaster (110 or 220 VAC)

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Periodic purging of valves is mandatory in water and wastewater treatment plants. This purging may demand high maintenance and care when done manually. This is where Lakos AP-75-MBV 3/4" AccuPurge automatic valve can help. This is one of the important types of automatic valve, which eliminates the need for routine maintenance, as well as performs purging of grit and sand.

This automatic valve allows a user to set the purge duration and purge frequency. Both these features can be easily set on the basis of the sand present in the water. Frequent purging is required for heavier sand deposits. The water loss during the purging will depend on factors such as water pressure, water flow, and purge duration. A purge duration of 20 seconds is enough to flush 5-10 gallons of sand and water.

We provide the Lakos AccuPurge automatic valve in the following specifications:

  • Model: AP-75-MBV
  • Connection Size: ¾-inch, female, NPT Product
  • Weight: 1.5 lbs.
  • Housing: Weatherproof, IP65 rating
  • Battery Backup: 4 qty. “AA” size 1.5v DC (not included)
  • Valve Type: Nickel-plated brass, stainless steel ball
  • Maximum Pressure: 150 psi (10.3 bar)
  • Operating Temperature: 32-140° Fahrenheit (0-60° Celsius)
  • Compliance: CE Compliant

Beneficial Features of the AccuPurge Automatic Valve
AccuPurge purge valve can be easily programmed to match your requirements. In addition to this, the following beneficial features of these purge valve systems have contributed to their easy acceptance in various industries:

  • The valve has a nickel-plated brass body, and is fitted with a stainless steel ball.
  • The valve can be installed in any required position at the purge connection.
  • There is a backup powered by batteries. This feature provides fail-safe closure of the valve during the power interruption.
  • This valve can be operated using 4AA batteries, which are not included with the device.
  • AccuPurge valve is provided with a 3-prong grounded plug. This plug provides an easy installation.
  • The valve is equipped with a valve open indicator and LED display for programming.
  • Purge duration can be easily set at a minimum for 20 seconds or maximum for 5 minutes. The long duration is recommended for the purge lines, where the distance between the valve and the open discharge is larger than 2-3 feet.
  • Purge frequency of the valve can be easily set for 4 minutes, as well as up to 24 hours.
  • The same unit can be used for 110V or 220 V application.

Additional Information
How to Program the AccuPurge Automatic Valve
The programming can be performed by selecting the purge frequency and purge duration from the below-given charts.  
Purge Duration Chart
This is the duration when the valve will remain open. It is displayed using letters corresponding to the purge duration time.


Time (Including the 7-second duration time)


7 Seconds (rotation non-stop)


10 Seconds


15 Seconds


20 Seconds


25 Seconds


30 Seconds


45 Seconds


1 Minute


5 Minutes


15 Minutes

*Not recommended Setting
“D” should be used for a minimum duration
Purge Frequency Chart
This is the frequency of the opening and closing of the valve. The frequency is displayed using the numbers corresponding to the frequency time.




4 Minutes


8 Minutes


15 Minutes


30 Minutes


1 Hour


2 Hours


4 Hours


8 Hours


16 Hours


24 Hours

Here is a step-by-step instruction for programming the valve:

  1. Press the TEST and SET buttons simultaneously.
  2. Select the desired duration (alphabet) by pressing the SET button.
  3. Confirm the selection by pressing the TEST button.
  4. Select the desired frequency (number) by pressing the SET button.
  5. Press and hold the TEST button to open the valve. The valve will remain open for the duration selected by you. Thus, the cycle will start.

Note: The valve will be manually purged when you hold down the TEST button. This will automatically restart the program.
Conversion from 110 V to 220 V Program
The AccuPurge valve is designed for 110 V operation. However, it can be converted to 220 V easily. The following steps will help you achieve this conversion easily:

  • Remove the cover of the actuator. Find the terminal strip, which is located near the area of the power cord. This cord is located at the entrance of the actuator box.
  • Next, you need to loosen the screws on the terminals 1-4. There are two copper bridges on the sides of the strip. One bridge is located at terminals 1 & 2, whereas the other strip is located at terminals 3 & 4.
  • Remove the bridges slowly. Insert the first bridge at terminals 2 & 3. 
  • Tighten the screws on the terminals 1-4.
  • Replace the cover.

Note: Inserting the bridge at the terminals 2 & 3 will help loosen the power cord. This loosening will provide you the better access to the bridges. You can also use needle-nose pliers for the task.