Mechanical Technology July 2016

Mechanical Technology — July 2016

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Hydraulic and pneumatic systems: power packs, compressors and valves

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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

Compact cast iron gear pumps

with 19 000 configurations

HAW’s newly developed PG331 spheroidal

cast-iron gear pump with extended longevity

has more than 19 000 configurations and

four different porting arrangements.

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.

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.

Hytec Group

and

Bosch Rexroth

at EMA 2016

ytec, Hytec Fluid Technology (HFT),

Hydraulic & Automation Warehouse

(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

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.