Mechanical Technology July 2016

⎪ Hydraulic and pneumatic systems: power packs, compressors and valves ⎪

Compact cast iron gear pumps with 19 000 configurations

Hydraulic and Automation Warehouse (HAW), part of the Hytec Group, one of the largest distributors of hydraulic components in southern Africa and specialist supplier of products for mobile machinery, has added newly-developed cast iron gear pumps with extended longevity and numerous advantages to its existing range of Salami gear pumps and other hydraulic components.

T he newly developed PG331 series is a spheroidal cast-iron gear pump with more than 19 000 configurations and four different porting arrangements. It can be supplied in variations of 12 different displacements and has up to five flange mounting styles and seven shaft types. The pump design also allows for standard SAE flanges. These gear pumps are compact with smaller dimensions achieved by install- ing the gear set, gear support bushings, and suction and delivery ports within the main body, housed by a front mounting flange and rear cover. “Competitor mod- els generally have larger and longer front and rear housings to accommodate shaft supports, which separate port housings and are therefore less compact,” explains HAW key accounts manager Dries van Wyk. “This range of pumps can accommo- date any engineering design and satisfies a variety of OEMmanufacturing designs.” Strength, high efficiency and long service in severe operating environments are achieved through the pump’s one-piece drive shaft construction, with a large area and low friction bushings. “In addition,” states Van Wyk, “an advanced thrust plate design and high quality machining tolerances optimise performance and high volumetric efficiency throughout the full pressure range.” This also allows for excellent axial compensation. Moreover, PG331 gear pumps feature double shaft seals on pumps with reinforced inner shaft seals for motors.” He adds that performance is optimised – even under high tempera- tures and low viscosity conditions. Another advantage of this pump range is the high carbon content and low static discharge capabilities due to their cast iron make-up. This combination renders

HAW’s newly developed PG331 spheroidal cast-iron gear pump with extended longevity has more than 19 000 configurations and four different porting arrangements. them explosion-proof, making them the ideal choice for use on underground vehicles and equipment – even those used in mines where combustion risks are high. The new PG331 not only matches, but also surpasses, other cast iron gear pumps, according to Van Wyk. He says the easy reconfiguration into numerous variations allows HAW to match most other makes of gear pumps in both metric and imperial configurations with drive shafts and porting arrangements in this range. “We can also add on-board auxiliary valves for priority flow, pressure relief and load sensing applications.” Components used within the gear pump are the same as those used in standard aluminium gear pumps, ensuring perma- nent availability. Joining an established international distributorship, which includes France, Spain, North America and China, among others, HAW will distribute Salami’s new PG331 series cast iron gear pumps in South Africa and across sub-Saharan Africa. The company retains a com- prehensive stockholding at its Spartan offices in Johannesburg and conducts assessments and repairs through the Hytec Group. All wear parts, including seals and drive shafts, are held in stock. “Our large stockholding ensures fast turnaround time from order to delivery,” enthuses van Wyk. “Single pumps and motors are ready for delivery on the day ordered and the 2-, 3- and 4-stage pumps, which require assembly and test- ing prior to distribution, are ready for de- livery the following day,” he concludes. q Hytec Group and Bosch Rexroth at EMA 2016 H ytec, Hytec Fluid Technology (HFT), Hydraulic & Automation Warehouse

filtration test rig will also be on display at the stand. In addition to the latest hydraulic systems and components and advanced pump and motor refurbishment capabilities, Hytec will display a Hydrostatic Drive Unit to demonstrate control functions for mobile applications. Hytec Engineering will display its cylinder repairs ‘before and after’ units as well as a range of newly manufactured cylinders for mobile machines. For visitors coming from the rest of Africa, HSA will be available to discuss the Group’s product and systems distribution, as well as service and support capabilities throughout sub-Saharan Africa. HSA will present its most recent expansions into African markets. The Group’s EMA 2016 aim is to strengthen its position as Africa’s leader in hydraulic sales, service and repairs. q

(HAW), Hytec Services Africa (HSA) and Hytec Engineering – all part of the Hytec Group of Companies – will be collaborating at Electra Mining Africa 2016. In addition, Hägglunds, part of Bosch Rexroth, will be joining the Hytec Group on its stand to dis- play its ‘Gearbox Eliminator’. HAW, the authorised distributor for hy- draulic equipment manufacturers OMT and Salami in sub-Saharan Africa, will showcase these product ranges at the exhibition. The Salami ranges include gear pumps and mo- tors, load sensing valves and manual control valves, and OMT’s range of hydraulic acces- sories includes bell housings, drive couplings and level gauges. HFT, the group’s hydraulic fluid specialist, will be displaying mobile filtration kits used by major OEM’s. The Hy-Pro bulk diesel

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