Dry vacuum pumps technology – especially variable pitch screw chemical dry pumps – offers clear, measurable advantages in a wide variety of essential applications. A properly designed dry screw vacuum pump ensures the processing needs are accomplished with a safe, reliable, and cost-effective solution.
Dry screw vacuum pumps require no water or oil for sealing or lubrication in the vacuum stages. Consequently, these dry vacuum systems eliminate effluent generation, pollution, and high treatment costs.
Products Description
Dimensional Diagram of Dry Screw Vacuum Pumps
Products Applications
Dry Screw Vacuum Pumps are used in a variety of industries. They are suitable for applications ranging from steel degassing to growing silicon crystals for solar panels.
Each industry and application has different needs. To find out which vacuum solution fits your needs best, get in touch with our experts.
Find out more about how dry screw technology is used in different applications.
Thermal Management In Dry Screw Vacuum Pump
Thermal management is essential for the reliable operation of chemical dry screw vacuum pump.
In a pump that is too cool for a given process, aggressive vapors may condense, leading to corrosion, the dilution of lubricants, and the swelling of seals. This damage is serious but can only happen if the vapor is allowed to condense into the liquid phase.
Conversely, if the operating temperatures in the pump are too high for a given process, unwanted reactions such as polymerization or auto-ignition are possible, with the addition of high bearing temperatures or thermal seizure.
The effects mentioned above can be mitigated slightly by internal coatings but this is something that should never be relied on. Coatings work great to protect the pump during initial storage and system commissioning but they can only survive so long at the temperatures and vacuum levels where the pumps spend most of their time.
The key is to ensure that the process vapors stay in the vapor phase [Green area] in the figure below. A few strategies to ensure this occurs include temperature/flow control of the pump coolant, use of nitrogen purge to change process dew point, and the use of inlet condensers to remove the vapor upstream of the pump.
To further improve reliability where system challenges are always present, additional features can be added to the pump system to help guarantee reliability. One example is a solvent flush system to keep the pumping mechanism free and clean. Another being knock-out pots (KOPs) and filters to capture liquid or powder slugs when unable to prevent them.
Products Benefits
1,Easy Maintenance & Quiet Operation
Dry screw vacuum pumps require no water or oil for sealing or lubrication in the vacuum stages. Consequently, these dry vacuum systems eliminate effluent generation, pollution, and high treatment costs.
2,Wide Operating Range
Dry screw vacuum pumps operate at any pressure between blank of and atmospheric pressure. Pumping capacities are virtually limitless when paired with a high vacuum booster pump.
3,Reliable Performance
The low rotational speed ensures smooth and robust operation. Engineered to offer higher discharge pressure handling capabilities than vertical designs, allowing for more process time. With higher vapor and liquid tolerances, dry screw vacuum pump have a long service life.
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