Efficient Dust Collection with Pulse Solenoid Valves: Advantages of Double Diaphragm Design





Dust Collector Pulse Valves, specifically Pulse Solenoid Valves, are widely used in various industries, including cement, ceramics, paint, thermal power plants, concrete plants, detergent, glass, and iron and steel, to remove dust accumulated in bag filters or prevent solidification of dust in bunkers.
These valves come in two main configurations: single diaphragm and double diaphragm. Solenoid valves with connection sizes like 3/4″ and 1″ typically use a single diaphragm, while those with larger connection sizes such as 1 1/2″ and 2″ can be either single or double diaphragm. Double diaphragm valves offer some advantages over single diaphragm valves in terms of operation.
The advantages of using Double Diaphragm Valves include:
- More Effective Filter Cleaning: Double diaphragm valves provide more effective cleaning of the filter, achieving approximately 40% better cleaning compared to single diaphragm valves.
- Extended Diaphragm Lifespan: The diaphragms in double diaphragm valves tend to last longer, reducing the need for frequent replacements.
- Reduced Energy Consumption: Double diaphragm valves can help save compressor air and reduce energy consumption by providing energy at longer intervals and allowing for more efficient cleaning.
Pulse Solenoid valves function as diaphragm valves, but they require a minimum differential pressure to perform the on-off function when the coils are energized. The minimum pressure applied to the inlet should be 0.5 kg/cm2.
When the coil is energized, the armature becomes magnetized and moves upwards, venting the trapped air on the diaphragm through the exhaust. The compressed air under the diaphragm cannot rise above it quickly, leading to a pressure imbalance that causes the diaphragm to move up and the valve to open. This process is known as “shocking.”
In the case of double diaphragm solenoid valves, the process occurs twice. The air on top of the small diaphragm is evacuated first, which then vents the large diaphragm. This creates a faster differential pressure and results in a more severe shock. The operator can set the interval at which the shocking occurs, typically lasting for 50-120 milliseconds.
Overall, Pulse Solenoid Valves play a crucial role in maintaining dust collection systems and ensuring efficient and reliable dust removal in various industrial applications. The choice between single and double diaphragm valves depends on the specific requirements and operational needs of the dust collection system.
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