Winegrowers Supplies  -  Rubber-impeller pumps

Notes: the internal diameter of your hose must be large enough that excessive turbulence does not occur in the flow:-
         19 mm internal diameter, up to 3500 litres/hour,
         25 mm internal diameter, up to 5700 litres/hour,
         32 mm internal diameter, up to 8600 litres/hour,
         38 mm internal diameter, up to  litres/hour,
         50 mm internal diameter, up to  litres/hour,
         60 mm internal diameter, up to  litres/hour.

Where pump speeds are stated (litres/hour), this is the maximum, at zero pressure. The speed reduces as pump-head-height increases, typically 5000 litres/hour would reduce to 3000 litres/hour at 2.0 bar pressure.
A bypass, where specified, will allow speed to be reduced and provide pressure control.

Although mohno-pumps are superior, rubber-impeller pumps are much cheaper and also will pump liquids with suspended solids, so they are useful for: pumping press juice, racking from one tank to another etc. They are particularly useful for pumping very thick liquids (tomato juice, condensed milk etc).

In my opinion they are not ideal for sterile filtration with sheet filters, because the slight pressure fluctuation could push yeasts through the very smallest holes in the filter sheet. They can be used for coarse filtration.

As the impeller revolves in the pump casing, a partial vacuum is created at the suction side of the pump by an increase volume, drawing in fluid. This fluid is then transported to the other side of the pump in the spaces between the vanes and the fixed casing. At the discharge side, the available volume is decreased and the resultant increase in pressure forces the fluid into the outlet line. The change in volume is the result of a curvature of the vanes in the pump body.

        

The impeller is made of an extremely elastic rubber which is lubricated and cooled by the liquid flowing. There are different rubber materials available:-

Neoprene is the standard
Perbunan (NBR)
EPDM
Silicon
Viton (for higher temperature)

Spiral reinforced wine-quality hard-PVC tubing is sometimes used on the inlet side to prevent the tubing collapsing under suction.

I can supply the following makes, the factors to consider are: voltage, speed, with or without bypass, thread connections, one-direction or reversible motor, stainless steel or nylon body, motor rotation speed (low is better), mounting on wheeled trolley or with a carrying handle:-

I-Z series: large diameter inlet/outlet stainless steel housing,
                reversible motor (can pump in either direction), on a stainless steel trolley.

     Z40:       Z110 with hopper and auger:

 Z40:  40 mm diameter in/out, 6000 litres/hour, low rotation speed 900 rpm:-
         for Garola clamp fittings (the hose-tail-connector clamp fittings are extra cost):-
            
380 Volt, 600
           230 Volt, 620
         bypass - extra 30
         or with DN40 male threads on inlet/outlet, extra 20

Z110: 50 mm diameter in/out, 12,000 litres/hour, low rotation speed 900 rpm, 380 Volt, with bypass,
         for Garola clamp fittings (the hose-tail-connector clamp fittings are extra cost):-
           single speed model, 960
           two speed model, 1190
           variable speed model, 500 to 12,000 litres/hour, 2290
         or with DN50 male threads on inlet/outlet, extra 25 - well worthwhile
         available with 230 volt motor, 1.3 KWatt (rather than 1.1 kWatt for 380 volt) for 39 extra

Z180: 60 mm diameter in/out, 26,000 litres/hour, low rotation speed 900 rpm, 380 Volt 1.85 kWatt, with bypass,
         for Garola clamp fittings (the hose-tail-connector clamp fittings are extra cost):-
           single speed model, 1120
           two speed model, 1450
         or with DN65 male threads on inlet/outlet, extra 30 - well worthwhile

The Z110 or Z180 can be connected to a hopper with auger to pump mash or pommace from a grape de-stemmer or apple mill into a press or tank.

SEF MAG: Italian, http://www.sefpumps.net/electric-pumps-mag-ingl.pdf

      a range of models with variations, stainless steel housing and impeller shaft:-

          

MAG 22 M6: 1800 litres/hour, 230 Volt, 0.25 kWatt, low rotation speed 920 rpm, " bsp male threads, 380

MAG 33 M6: 3420 litres/hour, 230 Volt, 0.55 KWatt, 920 rpm, 1" bsp male, 445
                 5040 litres/hour, 230 Volt, 0.55 KWatt, 920 rpm, 1" bsp male threads, 545

optional extras: wheeled trolley: painted steel 29 or stainless steel 99,

            electrical Float kit, wired up ready for use, 89
    The float 'swims' in the liquid, when it hangs down the pump is switched off and when the float lifts up it switches on.
    It achieves this by disconnecting the electricity within the special float-switch plug.
    A weight is included in the kit, to overcome the problem of apple juice foam lifting the float.

          

The float-switch has a special Continental plug, an adaptor is needed to plug this into a UK 13 amp electric socket.
The pump has a normal Continental plug, which is plugged into the back of this float-switch plug.
If the pump is to be used without the float-switch then it is plugged directly into the adaptor, without using the plug for the float-switch.

Liverani: Italian, stainless steel housing and impeller shaft, low rotation speed 920 rpm:-

      

Mini: 1020 litres/hour, 380 Volt, " bsp male thread connections, 345

Midex: 3000 litres/hour, 230 Volt, 920 rpm, DN40 threads, 495   or with bypass, 745

optional extras: handle for lifting 5, wheeled trolley: painted steel 29 or stainless steel 99.

Internal bypasses on MAG and Liverani pumps are expensive, but a bypass can be made by fitting T-pieces directly on the inlet and outlet threads, with a connecting hose between them. A stainless steel ball-valve is then fitted in the bypass loop (directly on the T-piece outlet from the pump). With this valve open the liquid being pumped will take the path of least resistance which is back around the bypass loop, especially as there may also be a suction effect on the bypass hose at the inlet side of the pump. Closing the valve restricts the flow around the bypass, thus increasing the flow through the outlet hose.
Parts needed can be found in valves and connectors.

Kiesel: German, stainless steel housing (AISI 304), rotation speed of 1400 rpm:-

 

  230 Volt, without bypass:

 IP01, 0.37 kWatt, up to 1200 litres/hour, 432
 IP02, 0.55 kWatt, up to 2500 litres/hour, 465
 IP03, 0.75 kWatt, up to 5000 litres/hour, 499
 IP10, 1.5 kWatt, up to 10,000 litres/hour, 824

 IP03 with bypass, 1.1 kWatt, up to 5000 litres/hour, 557


 

 

 380 Volt, without bypass:

 IP01, 0.37 kWatt, up to 1200 litres/hour, 399
 IP02, 0.55 kWatt, up to 2500 litres/hour, 440
 IP03, 0.75 kWatt, up to 5000 litres/hour, 499
 IP10, 1.5 kWatt, up to 10,000 litres/hour, 724
 IP15, 2.2 kWatt, up to 15,000 litres/hour, 832
 IP20, 4.0 kWatt, up to 20,000 litres/hour, 1049
 IP30, 5.5 kWatt, up to 28,000 litres/hour, 1599


 

 

 380 Volt, with bypass:

 IP03, 0.75 kWatt, up to 5000 litres/hour, 559
 IP10, 1.5 kWatt, up to 10,000 litres/hour, 766
 IP15, 2.2 kWatt, up to 15,000 litres/hour, 915
 IP20, 4.0 kWatt, up to 20,000 litres/hour, 1124
 IP30, 5.5 kWatt, up to 28,000 litres/hour, 1774
 

these Kiesel pumps include a trolley except for IP01 to IP03 where a trolley is 65 extra.


Prices shown are exclusive of Vat.
Delivery will usually need to be charged at cost.

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