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PAC H pumps, as a part of Atlas Copco’s Head series, are perfect for high-pressure applications, and have been designed to reduce downtime and prolong lifespan, saving operational costs. The PAC H is a centrifugal pump that can handle liquids containing solids of up to 89mm in size. This makes the high head pump particularly well suited to industrial applications, such as water transfer in the oil and gas sector, quarrying and surface mining, construction, and other applications.
Keep in mind that maintenance of high head pumps can be challenging. Due to the location on remote environments of the high head pumps, there are few opportunities for visual inspections which would spot early signs of sub-optimal performance, such as excessive vibration or unusual wear and tear. Then, the design of the pump itself must be considered.
The issue of ready access to the pump hydraulics has been addressed with development of an innovative hinge kit. This comprises a ‘swing door’ that allows quick and easy access to the pump’s internal workings. Ease of maintenance is further enhanced with the use of a single bolt to remove the impeller. Bolted wear rings make for precise and simple replacement compared to pressed alternatives, and link belts are used to enable changeovers without having to dismantle the entire wet end of the unit.
The semi-cartridge seal design on the PAC H pump is unique and comes as standard, allowing seal access and replacement from the front. The unique Atlas Copco’s SEAL design allows changeout without dismantling the pump and makes the lip seal and impeller easily accessible via reducing downtime and simplifying maintenance. An integral seal oil bath prevents damage if the pump runs dry, while a visual inspection port makes leakage inspection simple.
To prolong pump operational life and protect the seal, Atlas Copco has developed an exclusive closed impeller that is equipped with deflector vanes. This provides two benefits: it improves thrust balance on the shaft and impeller to minimize wear and keeps the mechanical seal clean. Essentially, the vanes create a vortex that prevents the accumulation of detritus. This helps the mechanical seal last three times longer. Moreover, it eliminates the need to use flush water to keep the pump clean: offering significant energy and cost savings over the pump’s operational lifetime.
To further support minimal downtime through more efficient maintenance, PAC H pumps take advantage of digital technology. They are equipped with QR codes that mean essential information about parts and spares is just a scan away. Users can also take advantage of the fleet link secured and remote monitoring feature that means they are always in control of pumping operations.
Through a series of these design innovations, Atlas Copco has addressed traditional issues of inaccessible hydraulics and the need to disassemble pumps to perform simple tasks like replacement of consumables. In combination, these features of the high head centrifugal pump can improve mean time to repair (M.T.T.R.) by up to 30%.
However, improvements to pump design can only achieve so much in the drive to improve efficiency and optimize uptime, and especially the pump service. Availability of spares and adequate training are also essential, and these support services are provided through Atlas Copco’s global network of customer centers.