An Overview of Liquid Ring Pumps
Posted in Uncategorised, on August 17, 2021 By Admin
There are many different types of vacuum pumps to choose from, notably: rotary screw, liquid ring pumps, lubricated vane pumps, and more. The type you choose will be determined by your specific needs.
In today’s blog, we will be going over some major selection criteria for when to opt for a liquid ring pump:
1. Process Conditions
The easiest step in choosing a vacuum pump is to eliminate vacuum systems that cannot meet your process conditions. A vacuum systems’ vacuum level, capacity, temperature allowance, and discharge pressure will determine what kind of conditions it can withstand. Choose a liquid ring pump if you require higher torr ratings for blank-off pressure, higher PSI ratings for discharge pressure, higher inlet capacities, and a higher inlet gas temperature.
2. Operating Characteristics
Gas and vapour streams can be toxic, corrosive, wet, or reactive. Compare the different operating characters of vacuum systems when compressing has or vapour streams to determine the equipment that best suits your needs. For instance, liquid ring pumps have:
- High tolerance for water gas and vapour rings, with increased efficiency as condensation occurs
- Extra allowance for soft solids and the ingestion of abrasive materials as compared to that of dry screw pumps
- Constructions made of different materials that can be corrosion-resistant
- Cool discharge temperatures that curb gas or vapour reactions and explosive gas
- Accessories such as packings and seals to contain toxic gas and vapours
3. Considering Process Gas or Vapour Contamination
Liquid ring pumps are suitable for the dirtiest processes thanks to their ability to withstand harsh environments and aggressive liquids, vapours, and gases. In light of this, sealants are used to aid the process, during which pump efficiency will increase as condensation gets trapped by the liquid ring. For these reasons, they are frequently used in the following industries:
- Chemical plants
- Environmental processes
- Food and beverage processing
- Marine processes
- Mining
- Oil and gas processes
- Paper milling
- Pharmaceutical manufacturing, and more.
McRae Engineering also has a useful flowchart that can help you decide on the best vacuum pump for your needs.
This simplified process can help you with your preliminary research, and McRae representatives will be more than happy to aid with the rest of the selection process. Call us today to learn more about our products!
