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Vac2Go Operation

Whether you own your own combination unit vacuum truck or you are renting a vacuum truck, it’s important to understand how the air flows through the truck. Understanding the airflow will help you operate your vacuum truck more efficiently and effectively. Today we will look at how the air flows through a combination unit vacuum truck.

Debris is vacuumed through the vacuum hose in the boom. The debris that is picked up in the air flow first enters the vacuum truck through the inlet or top of the debris body. After the debris has entered the debris body it hits the deflector shield and drops out of the air steam. The debris piles on the bottom of the debris tank and then circulates around the debris body and then back towards the rear of the unit. The air stream leaves the debris body through the outlet pipes and if equipped flows into two sets of cyclone filter chambers. In the filter chamber, the centrifugal force hurls the denser particles towards the cyclone walls where they spiral downward into the collection hopper. The lighter and by now relatively particular free air which has traveled through the bottom of the cyclone returns to the top and the air stream leaves the cyclone chambers and flows towards the front of the unit to the vacuum source which is either the Fan or the Blower.

Combo Unit Air Flow Diagram

Normally, on a Fan unit the air flow will enter the fan housing and then exhaust through the fan exhaust ports. With a PD unit, there is a micro strainer located just prior to the blower inlet. This micro strainer is a safety dropout point for any objects which may accidentally enter the filtration system during servicing. The air stream leaves the micro strainer and enters the blower. The air stream leaves the blower through the silencer. The silencer reduces the noise level of the air being discharged.

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