PROCESS EQUIPMENT Fail-safe at depth
The right submerged column pump for difficult applications
When toxic, potentially explosive or boiling liquid media need to be pumped from depth, this results in particularly high requirements for pump technology. Fluctuating feed rates and sporadic operating patterns are likewise challenging tasks to master.
The submerged column pumps from Bungartz are designed specifically for such difficult pumping tasks. Like all pumps from this manufacturer, these pumps have a high degree of intrinsic safety. All models – including those with a magnetic drive – are safe to run dry. Thanks to the hydrodynamic shaft seal used as a primary seal, the secondary sealing (e.g. packed gland, double mechanical seal etc.) is prevented from coming into direct contact with the pumping medium. The hydrodynamic seal principally consists of distinctive blading on the rear of the impeller. In this way the pumping medium is transported away from where the shaft passes through the casing, thus protecting the downstream secondary seals. Grease-lubricated rolling bearings, which are not in contact with the product, have a minimum service life of 32,000 hours and require neither monitoring nor maintenance.
For this reason, e.g. the economical and high-performance submerged column pumps from the modular TCC series (as
SEPTEMBER/OCTOBER 2021
normal-priming or self-regulating variants) are used for pumping chemical liquids out of tanks and vessels where zero leakage is required. They also reveal their high efficiency when pumping chemical waste water with solid fractions or materials in fertiliser plants. Equipped with a lip seal, they can be used at large immersion depths in ATEX zones 1 and 2, which do not continuously have explosive atmospheres. Where bearing damage has occurred, frequently caused by standard pumps with slide bearings, they have been the preferred solution in retrofitting conversions. The MPCT- AN is equipped in accordance with strict safety standards, and comes from another series of submerged column pumps that are safe to run dry. This hermetically sealed vertical pump is fitted with a vortex-free magnetic drive (through a ceramic containment can). It utilises a sophisticated threefold seal, which also includes a gas-sealed lip seal (sealing gap = Clearance). Gas barriers (sealing gas) protect the bearing unit against penetration of product vapours. The bearing and sealing unit remain free from contact with the product or pumping liquid or their gases, and are thus dry at all times. “One special feature of the MPATAN lies in its self-regulating behaviour, which characterises all of our V-AN series pumps,” explains Frank Bungartz, CEO
www.reviewonline.uk.com
of the manufacturer of the same name. Type V-AN pumps automatically adjust to changing feed rates. Their operation is cavitation-free, because the NPSH value is almost zero.
With an immersion length of up to 5.5m and capable of conveying media at temperatures of up to 280°C, the MPCTAN is entirely predestined for critical applications. Approved for ATEX zone 0, at facilities around the world it pumps boiling and/or toxic, highly contaminated and even explosive materials containing gases and solids.
Because the engineers and designers of the manufacturer provide individual advisory services and support customers throughout the entire process, the plant costs are frequently reduced, e.g. through efficient infrastructure.
All pumps from this manufacturer are designed on a requirement-specific basis and manufactured to order using series-produced components.
An online brochure provide further information about details such as media properties, potential applications, and much more:
https://bungartz.de/en/ broschueren.html
Enquiry No. 7
7
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32
