Editor's Choice


World’s most powerful pneumatic knocker for heavy-duty industries

January 2024 Editor's Choice Pneumatics & Hydraulics

Pneumatic knockers are a valuable tool in minimising buildup of materials and preventing disruptions in material flow in silos, rotary dryers, coolers, granulators and coating drums. This helps plant managers improve production efficiency and product quality. A pneumatic knocker achieves its high rate of impact power through spontaneously released energy stored in the form of compressed air.

singold produces and sells the world’s most powerful pneumatic knocker. While competing models can at best cover a wall thickness of up to 12 mm, singold’s K160 can knock walls with a thickness of up to 25 mm. This makes it suitable for massive, heavy-duty containers. For example, it is used in the mining industry for large silos and discharge chutes, in the building materials industry for gravel bunker outlets, in the chemical industry for mixing plants, in the lime industry for silos with a capacity of over 200 tons, and in the fertiliser industry.

Supernatural strength

The powerful K160 from singold has an impact energy of 423 Nm. This corresponds to the energy generated when a weight of 42 kg is dropped from a height of 1 metre. This high-impact energy cannot be achieved with human forces, even if a 20 kg sledgehammer were to be used. The reason? The acceleration and final velocity of the impact weight in the knocker are far higher than the final velocity that a human being can generate. The piston in the K160 is designed as a magnet. When it is pulled off the anchor plate, the acceleration is 250 m/s2. When the magnet hits the striker at a speed of 7m/s, accelerations of up to 30 000 m/s2 occur. A human being would need two to three times as much hammer weight as the knocker impact weight to generate the same impact energy as the K160 knocker. To put it into perspective, the knock of a K160 is as strong as if you let a 42-kilogram weight drop from a height of one metre onto your foot!

Knocking at the limits of technology

The pneumatic knockers from singold are true masterpieces of engineering. They create the greatest possible impact with the lowest possible dead weight, testing the limits of technology. The K160 model weighs 62 kg and has compact external dimensions, meaning it can easily be retrofitted into existing plants.

The right knocker for every system

In addition to the K160, singold offers a variety of other knockers. Depending on the operating temperature, application area and wall thickness, models can be adapted to every need. Whether you have very large silos, high temperatures or special hygiene requirements, you will have no problem finding a knocker perfectly suited to your specific needs.


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