Solenoid-Controlled Air-Operated Double Diaphragm Pumps (AODD Pumps)

The Solenoid-Controlled AODD Pump is an upgraded version of the traditional pump that relies solely on compressed air. By incorporating a solenoid valve to replace the conventional switching components, the pump’s operation and frequency can now be controlled electronically. This allows adjustment of stroke rate and frequency as required, delivering significant advantages of electronic control. With its compatibility for data integration and automated production, it is highly suitable for markets that demand precise flow control.

Specifications:

Advantages / Features:

1. Enhanced Automation Control
   Can be activated and stopped via PLCs, automated control systems, timers, or remote signals, enabling fully automated or remote operation.
2. Precise Start/Stop Control
   Immediate and accurate start/stop through electronic signals, ideal for processes requiring intermittent, cyclical, or precise dosing operations.
3. Integration into Automated Production Lines and Equipment
   Compatible with sensors, flow meters, and pressure switches; can be integrated into MES or SCADA systems, supporting smart factory applications.
4. Improved Safety and Fail-Safe Mechanisms
   Safety interlocks (e.g., auto-shutdown under excessive pressure) can be set to prevent misuse or overload, extending equipment life and ensuring safe operation.
5. Energy Efficiency (Flow-Demand Based)
   Pump operation time can be adjusted to actual requirements, avoiding idle or dry running, thereby contributing to energy savings in compressed air systems.
6. Suitable for Batch or Intermittent Transfer
   Especially applicable for intermittent dosing, quantitative delivery, or batch chemical feeding.
7. Remote Monitoring and Maintenance
   When combined with signal feedback (e.g., sensor reporting), pump status such as stroke count and operating hours can be monitored remotely, enabling preventive maintenance and fault alerts.
8. Preserves the Core Advantages of AODD Pumps
   Since fluid transfer remains air-driven, it retains the traditional benefits such as handling fluids with particulates, high-viscosity liquids, or applications requiring low shear.
9. Cost and Space Savings
   Eliminates the need for additional large solenoid valves and extended piping when integrating control into standard air-driven diaphragm pumps, reducing installation costs and improving space utilization.

Operating Principle of Solenoid-Controlled AODD Pumps

1. Solenoid Valve Controls the Pilot Valve
   The solenoid valve is mounted on the pump’s pilot valve. When the solenoid valve receives a signal from the control unit, the valve core opens, allowing compressed air to pass through and drive the pilot piston to switch, thereby achieving pump direction change. When the signal is cut off, the solenoid valve closes, blocking the air supply to the piston side, and the pilot piston resets, causing the pump to reverse again. Through this closed-loop mechanism, the pump completes its electronically controlled cycle.
2. Electronic Signal Control
   The actuation time and frequency of the solenoid valve can be flexibly managed by PLC control logic, timers, pressure/level sensors, or HMI systems.
3. Solenoid Valve Voltage Options
   The standard configuration uses DC24V, but other options such as DC12V, AC24V, AC110V, and AC220V are also available depending on application needs.
4. Operation Flow

Applications

• Metered Transfer: Enables precise control of each delivery cycle, including start, stop, and duration.
• Automated Control: Integrated with sensors and PLCs for automatic start and stop.
• Safe Operations: With feedback systems, anomalies can be detected, notified, and managed in real time.
• Unmanned Production Lines: Ideal for nighttime or remote operations without manual supervision.
• Intermittent Transfer: Supports cyclic transfer or condition-based operation.

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