Air Cannon CNU-M Serie

In a fraction of a second the CNU-M air cannon blasts a volume of pressurised air through a broad section pipe, until it reaches the critical areas of the silo where the bulk material has become blocked. This accumulated energy, by being suddenly released, exceeds the adherence friction, and as a result of the airjet, the blocked material again flows normally by gravity, with little sliding friction.

The CNU-M air cannon is a safe method, as the valve used does not produce any sparks or flame. Besides of this, other fluids can be used, as the nitrogen. On the other hand, the structure does not suffer, as the energy is applied directly to the material. The design reduces the backward motion to the minimum, avoiding any possibility of stress on the structure.

• Solution for material flow problems.
• Simple, efficient, noiseless and economic.
• Safety for the staff.
• Whole capacity of the deposit is useful.
• Membrane shot as the only moving part.
• System patented.

The CNU-M air cannon can be used in concrete, steel, wooden or plastic silos, tanks and hoppers. Any shape, form or inclination can be valid as long as the material to be fed is blocked.

The CNU air cannon works with normal air pressure lines, starting form 2 to 10 kg/cm2. It is highly recommended that the used air is clean and dry. The effectiveness is increased with the pressure. Normally a pressure between 2 and 6 kg/cm2 is enough.

The maximum drive frequency allowed to activate the air cannon is 12 shots per minute, even though a few shots per day are enough under normal conditions.

The 3/4" quick exhaust valve V -included in the scope of the supply- has to be installed in the outlet of the air cannon. This exhaust valve has to be commanded by another valve, with a minimum diameter of 3/8".

The air cannon is secured to the tank or hopper with a few accessory pipe elements and is connected to the air pressure network through a control valve sometimes combined with a full automatic pneumatic drive circuit.

The control valve can be a 3/2-way valve, a 5/2-way valve; electrically, pneumatically or manually commanded. It can be connected to the exhaust valve directly or through a rigid tube; in this case, the minimum tube diameter must be 10 mm and the maximum length of 1,5 m.

The only moving part in the CNU-M air cannon is a membrane accessible from the outside without dismantling the unit. This membrane gives the air-tightness to the air cannon.

CNU air cannons fulfil Council’s Directive concerning pressure vessels 87/404/CEE.