Pump out waste with Dumac
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.