When a company is in the process of finding a vacuum truck for sale, it is important to obtain as much knowledge as possible about vacuum pump systems. Knowing how this piece of machinery works will be of great assistance in having a clear understanding of how this powerful pump generates the force that is necessary for the vacuuming process.
Vacuum trucks basically consist of a large tank and a large vacuum tank, both of which are mounted onto a truck. This type of equipment is often used to clean streets, sewers, home septic systems and contaminated soil. This versatile vehicle is used by many different industries for a variety of pumping needs.
It is important to know exactly how these vacuum systems work before beginning the process to find a vacuum truck for sale. A low pressure region generates a vacuum; since air molecules do not like low pressure, they immediately rush to escape to a higher pressure region. Using these physics, different types and designs of vacuum pumps were designed. The main function of a vacuum pump is to pull air out of a chamber, leaving the chamber void of any gas molecules.
In the process of creating a high intensity vacuum force, the chamber also generates heat and pressure. This is the reason why vacuum truck tanks are sealed off – to create a pressurized chamber. Usually rubber gaskets, grease or oil are materials that are used as sealants; however, these sealant materials are not perfect. This means they cannot stand the high levels of heat and if not properly maintained, may cause the release of noxious gas.
When looking for a vacuum truck for sale, it is important to know the basic components of the pump, which will also make it much easier to distinguish a good vacuum system to purchase. Following are some of these basic components:
- Diffusion Pump – Whenever a vacuum pump is turned on, the diffusion pump is where the uninterrupted vaporization and the condensation cycle take place.
- Rotating Mechanical Pump – This mechanism is responsible for managing the level of the exhaust. It also acts as the diffusion pump’s repository for the exhausted bulk air that cannot be released into the atmosphere.
- Cold Trap – The cold trap helps keep oil vapors from getting into the diffusion pump system; its main function is maintaining the proper pressure that is supplied to the vacuum pump system.
- Tank – The vacuum pump system includes the tank which usually has three chambers: the vent chamber; the rough chamber; and the hi-vac chamber.
Types of Vacuum Pump Systems
Generally, any vacuum truck vacuum pump system uses two different types of vacuum systems: the positive displacement and the momentum transfer.
- Positive Displacement – Positive displacement works by repeatedly expanding a cavity to allow gases to flow from outside the vacuum tank chambers. This type of vacuum system mechanism works best for generating a low vacuum.
- Momentum Transfer – For the momentum transfer (also known as a molecular pump), this mechanism uses a jet that runs a high speed of dense fluid which causes gas molecules to move out of the chamber before it is sealed off. These gas molecules are pushed out of the chamber by high speed blades. This mechanism is commonly used for the generation of a high vacuum.
With any vacuum truck for sale, every aspect of it should be thoroughly examined. This can only be achieved by having sufficient knowledge about vacuum trucks. The vacuum pump system is an essential component of this equipment and will greatly affect its overall performance. Knowing the science behind the pump means a business owner can purchase the right pump system for their vacuum truck, permitting it to operate efficiently, which can increase the company’s productivity and profitability. Knowing the science behind the pump will prove very advantageous when looking at the purchase of a new vacuum truck!