Reducing pulsation! Demonstration and solution on pump pulsation.

1. What is a Pressure Storage Tank?

A pressure storage tank functions by utilizing an enclosed space to buffer fluid pulsation in an AODD pump’s output. It can reduce pulsation by approximately 40–60%, making it the simplest and most cost-effective fluid buffering accessory.

2. What is a Fluid Pressure Regulator?

A fluid pressure regulator (also known as a pulsation dampener) is designed to suppress and stabilize pulsation generated during AODD pump operation. It ensures a consistent coating pressure and spray volume. Properly adjusted, it can reduce pulsation amplitude by more than 95%, significantly improving fluid stability.

Key Features:

1. Reduces Pulsation and Vibration

• AODD pumps generate noticeable pulsation due to their reciprocating motion. A fluid pressure regulator absorbs pressure fluctuations, ensuring a smoother fluid output and minimizing internal system pressure variations.

2. Decreases Pipeline Noise

• By mitigating water hammer effects and resonance caused by pulsation, fluid pressure regulators help reduce pipeline vibrations and noise, enhancing system quietness.

3. Protects Piping and Equipment

• Reduces pressure spikes that could damage pipelines and valves, extending equipment lifespan and lowering maintenance costs.

4. Improves Flow Stability

• Ideal for applications requiring consistent flow rates, such as precision spraying, metered dosing, or process control. It prevents pulsation-related quality inconsistencies.

5. Enhances Metering and Flow Accuracy

• By eliminating sudden pressure fluctuations, it enables more precise flow measurements, making it highly suitable for chemical dosing, coating applications, and precision mixing systems.

Performance Comparison: AODD Pump with Pressure Stabilization Accessories

AODD pumps (Air-Operated Double Diaphragm Pumps) inherently produce pressure pulsation and water hammer effects during fluid transfer, potentially impacting output stability and downstream equipment performance. DYI SHENG conducted a performance comparison of different pressure stabilization accessories to address this issue to determine the most effective solution.

Test Conditions

• Pump Model: DYI SHENG 3/8” DS03 Aluminum AODD Pump
• Air Inlet Pressure: 3 Bar (kg/cm²)
• Test Items:
1. No stabilization accessories
2. Pressure storage tank installed
3. Fluid pressure regulator installed
4. Adjusted fluid pressure regulator settings

Test Results & Analysis

1. Without Any Stabilization Accessories

• Output Pressure Pulsation Range: 2–3 Bar (kg/cm²)
• Observations: Severe pressure fluctuations, significant water hammer effect, and unstable output.

2. With pressure storage tank Installed

• Output Pressure Pulsation Range: 2.2–2.8 Bar (kg/cm²)
• Pulsation Reduction Effect: ~40%
• Observations: Some reduction in pulsation, but noticeable pressure variations remain.

3. With fluid pressure regulator Installed

• Output Pressure Pulsation Range: 2.2–2.4 Bar (kg/cm²)
• Pulsation Reduction Effect: At least 80%
• Observations: Significant reduction in pulsation and resonance, resulting in much smoother fluid output.

4. Fluid pressure regulator Set to 1 kg/cm²

• Output Pressure Pulsation Range: 1 Bar (kg/cm²)
• Pulsation Reduction Effect: Nearly pulse-free
• Observations: Extremely stable fluid output, achieving an almost pulse-free effect.

Conclusion & Application Recommendations

Test results indicate that without stabilization accessories, AODD pumps exhibit extreme output pressure pulsation, compromising fluid transfer stability.

• For applications with lower stability requirements, a pressure storage tank can reduce pulsation by about 40%, making it suitable for general fluid transfer systems.
• For higher stability needs, a fluid pressure regulator can reduce pulsation by 80% or more, making it ideal for precision applications such as metering pumps and spray coating systems.
• For ultra-sensitive industrial processes, such as electronics, semiconductors, pharmaceuticals, and precision coating, setting the fluid pressure regulator to 1 kg/cm² can achieve nearly pulse-free operation, ensuring the highest level of stability.

Additionally, the test confirmed that the optimal fluid inlet-to-outlet pressure ratio is 3:1, effectively enhancing fluid transfer stability and reducing equipment wear.

By selecting the right stabilization accessories, AODD pumps can meet diverse application demands, ensuring greater reliability and efficiency in fluid transfer systems.

CONTACT US

Learn More

Performance Insights

• A Step-by-Step Guide to Reading Pump Performance Curves
• Simple Steps to Understand the Air Consumption Curve of Pneumatic Diaphragm Pumps
• Custom AODD Pump Solutions by DYI SHENG: Understanding Model Number Nomenclature

Disassembly & Maintenance Series

• Reduce Downtime: Preventive Maintenance and Usage Tips for Pneumatic Double-Diaphragm Pumps
• Tips for Disassembly, Maintenance, and Repair of Air operated diaphragm pump

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