Pump out waste with Du­mac

Farm World News - - Farm World 2016 -

Du­mac Dis­trib­u­tors P /L a 100% Aus­tralian owned and op­er­ated com­pany, man­u­fac­tur­ing and sell­ing our own brand of waste dis­posal pumps since 1963.

We man­u­fac­ture with a max­i­mum of Aus­tralian made ma­te­ri­als.

The first model was the “Fil­ter-Cut” pump which is still man­u­fac­tured and has been up­dated over the years but with the im­por­tant key fea­tures re­tained in today’s model.

Orig­i­nally it was a hor­i­zon­tal unit with the body cast into the pit wall and the mo­tor mounted above the pit, which had prob­lems.

These were over­come by our first ver­ti­cal col­umn waste pump, the first in Aus­tralia and pos­si­bly the world for this ap­pli­ca­tion.

The “Fil­ter-Cut” pump worked well, but like all other pumps it was sub­ject to ex­ces­sive wear. A de­ci­sion was made to go in a dif­fer­ent di­rec­tion with the wet end, it would not have the cutting ac­tion and ag­i­ta­tion of the “Fil­ter-Cut” but be tough enough to han­dle abra­sive and large solids.

The “Ruffy” pump model was re­leased Septem­ber 1974 with great suc­cess and did so well it still re­tains the main fea­tures of the orig­i­nal and has only had 2 mod­i­fi­ca­tions in that time and they were both done within the first year af­ter its re­lease.

The “Fil­ter-Cut” pump comes in 2 out­let sizes, 11/2” and 2” BSP and in col­umn lengths to suit pit depths from 2’6” (760mm) to 12’ (4.57m) all have an ex­ter­nal ag­i­ta­tor blade that is at­tached to a 75mm ex­tended im­peller nut which are both made from case hard­ened steel.

This, to­gether with re­place­able hard­ened steel tips fit­ted to the faces of the im­pel­lor vanes and a hard­ened steel per­fo­rated plate with a clear­ance of ap­prox­i­mately .020”, com­bine to ag­i­tate and cut up solids; it is a true cutting ac­tion not just bash­ing.

The 11/2” model can have mo­tors from 2Hp – 7.5Hp (1.5kW - 5.5kW) with a max­i­mum of 28m shut off head or 680l/min open dis­charge.

The 2” model can have mo­tors from 5.5Hp – 25Hp (4kW – 18.5kW) with a max­i­mum of 73m shut off head or 1450l/min open dis­charge.

The “Ruffy” pump at present has a 2” BSP out­let with col­umn lengths to suit pit depths from 2’6” (760mm) to 6’ (1.83m), it has a large open steel im­pel­lor with a heavy walled cast iron cas­ing.

Suc­tion is unique, in that it is from above the cas­ing and when in op­er­a­tion there is neg­a­tive pres­sure in the col­umn and there­fore does not re­quire any seals.

Stan­dard op­er­a­tion for the “Ruffy” is di­rect cou­pled with a 3Hp (2.2kW) 1440 rpm mo­tor, de­pend­ing on the dis­tance or liq­uid be­ing pumped may need a 4Hp (3kW) mo­tor, where higher out­put is re­quired it can be belt driven with a 5.5Hp – 7.5Hp (4kW – 5.5kW) mo­tor, also be­com­ing pop­u­lar is in 3phase op­er­a­tion, it is di­rect cou­pled with the larger Hp and a vari­able speed drive.

The out­put is from 24m – 35m shut off head or from 980l/min – 1200/min open dis­charge.

The “Fil­ter – Cut” range of pumps are most suit­able where there are softer solids in sus­pen­sion, heavy sed­i­ment or high heads.

The most com­mon ap­pli­ca­tions are in Pig­geries, Abat­toirs, Winer­ies and food pro­cess­ing plants or sim­i­lar op­er­a­tions.

The “Ruffy” range of pumps are most suit­able where there are hard or abra­sive solids or very high vol­umes over shorter dis­tances with low power re­quire­ments and min­i­mal main­te­nance.

The most com­mon ap­pli­ca­tions are in Dairies, Abat­toirs, Winer­ies and in re­cent years some min­ing ap­pli­ca­tions.

None of the pumps will pump plas­tic bags or bail­ing twine, but at the same time un­der nor­mal cir­cum­stances they will not dam­age the pumps and both the “Fil­ter – Cut” and “Ruffy” pumps can be run dry with­out dam­age.

Du­mac Pumps are also agents for the Teco range of elec­tric mo­tors and vari­able speed drives and the Ebara range of pumps which have ev­ery­thing from do­mes­tic sys­tems, bore­hole, sub­mersibles and min­ing pumps.

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