Better vacuum levels result in better end-product quality for many customers thanks to lower contamination levels and/or
Repeatable vacuum performance is desirable for any production environment. Factors like oil/water temperature or condition, that are necessary in oil-sealed and liquid ring vacuum pumps as a sealant for the compression mechanism, do not affect dry running vacuum pumps.

EDP pumps are based on Edwards' oil-free, non-contacting, award-winning, reverse claw mechanism.
This robust mechanism has been specifically designed to provide stable operation for heavy-duty applications even with variable process conditions. It has been tried, tested and proven by the industry over thousands of chemical, pharmaceutical and petrochemical installations and represent the dry vacuum pump standard for many customers worldwide.
In addition to its unique mechanical design, the high mass of the pump together with the robust indirect cooling mechanism provides a unique thermal inertia that allows the pump to handle real-life process upsets and maintain a stable operation.

The EDP has been proven as a very robust dry vacuum pump with a compression mechanism, sealing design and an internal temperature profile that allows excellent handling of process vapours and also a relatively large amount of liquids and solids from process upsets.
One of the keys to chemical dry pumping is the ability to maintain an internal temperature profile that is optimal at maintaining the process vapours in the gas phase throughout the pump, maintaining a stable internal temperature during the process and avoiding the extremes of condensation (too cold) and polymerisation (too hot)
The EDP uses
This combination results in a very robust vacuum pump to pump chemicals.

The EDP internal mechanism can be cleaned during a process or at the end of a process batch to remove process material even for the harshest processes. The pump can be flushed or soaked automatically without the need for manual internal cleaning of the rotors and stators.

Edwards has developed proprietary sealing mechanisms for all of its dry pumps and provide the most effective pump sealing technologies in the market for aggressive vacuum applications. Sealing of the oil box and bearings is provided by a combination of internal elements and the purging of seals with Nitrogen.
Unlike other pumps, the supply of purge gas is a non-critical element on the EDP, meaning that the occasional failure of reduction of purge gas flow will not result in damaged electronics or motors.

After selecting the right dry vacuum pump it is important to consider the accessories that will complete the vacuum system in order to meet with the process and Atex requirements as well as to provide maximum pump reliability and longevity.

We have the capability to supply individual vacuum pumps and complete turnkey vacuum systems including hardware, controls and expert technical and service support. In the simplest expression, the EDP chemical dry vacuum pump can be supplied as a primary pump only, or in combination with a booster pumps, valves, traps, condensers etc. in a compact footprint.