I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator Briefs
Biofertilizer + biogas Three new biofertilizer-biogas facilities will be built…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment

These liquid-ring pumps feature two drives

By Chemical Engineering |

Edwards Vacuum

The ELRi range of liquid ring pumps (photo) is designed for use in applications that are wet, humid and corrosive. The stainless-steel impeller, endplates, liquid reservoir and heat exchanger make this pump highly resilient against corrosion and harsh process gases. The internal injection channels reduce the risk of leakage while the horizontal motor-flange arrangement saves time on maintenance. ELRi pumps are equipped with two variable-speed drives (VSDs). While the main VSD matches the speed of the pump to vacuum level by adjusting its speed, the second VSD regulates the water flow through the centrifugal pump according to the operating conditions to avoid risks of cavitation. A patented algorithm maintains synchronicity between the two VSDs. In addition, pumps are protected against automatic seizure, so pump failure is not a concern after long periods of inactivity. The ELRi series is available with pumping capacity from 750 to 1,050 m3/h. All pumps are also fitted with spray nozzles as standard, which are particularly useful for high-steam-load applications. Moreover, manual and automatic flushing modes allow operation in dirty applications with minimal downtime. — Edwards Vacuum, Burgess Hill, U.K.

www.edwardsvacuum.com

 

Related Content
Significant order for Bungartz
The second largest order in the company's history, with a volume of around 1.4 million, was placed with the special…
Show Preview-IFAT
IFAT (rescheduled for September 7–11, Munich, Germany; www.ifat.de) is the world’s leading tradefair for water, sewage, waste- and raw-materials management.…
Updating Legacy Rotating Equipment
A brief look at the benefits of installing modern materials and design upgrades through retrofit projects in chemical plants Modern…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Crude distillation unit (CDU) optimization
Video - A new era of temperature measurement in the chemical industry
Expectations are shifting: How measurement solutions can help overcome chemical industry challenges
Video - CoriolisMaster
Video - Do you really need a thermowell?

View More