Winegrowers Supplies  -  Rubber-impeller pumps

Notes:-

The internal diameter of the hose must be large enough so that significant turbulence does not occur in the flow:-

         20 mm internal diameter, up to 3,500 litres/hour,
         25 mm internal diameter, up to 5,470 litres/hour,
         32 mm internal diameter, up to 8,960 litres/hour,
         38 mm internal diameter, up to 12,600 litres/hour,
         50 mm internal diameter, up to 21,900 litres/hour,
         60 mm internal diameter, up to 31,500 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:- the maximum liquid temperature for a Neoprene impeller is 60 C.
Perbunan (NBR)
EPDM
or
Silicone:-
Viton (for higher temperature)

The question whether a pump is 'self-priming' is often asked. Manufacturers often state that pumps are self-priming, it is a matter of what they mean by self-priming !
The pump chamber will be self-primed from liquid that is just outside the pump chamber. It will not suck liquid along an attached hose unless the chamber is primed with liquid.
If it runs dry for more than a few seconds the rubber impeller will burn; the rubber tips then expand.
You don't need to replace the rubber impeller until it won't pump any more, it should last a long time but it's worthwhile to keep a spare.

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


I supply the following three makes, the factors to consider are: voltage (230 or 380 Volt), maximum speed, with or without bypass, thread connections, one-direction or reversible motor,
stainless steel or nylon body, motor rotation speed (lower 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, 780 Euros
             230 Volt, 805 Euros
         bypass - extra 39 Euros
         or with DIN40 male threads on inlet/outlet, 40 Euros extra

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, 1120 Euros
             two speed model, 1435 Euros
             variable speed model, 500 to 12,000 litres/hour, 2775 Euros
         or with DIN50 male threads on inlet/outlet, extra 50 Euros - well worthwhile
         available with 230 volt motor, 1.3 kWatt (rather than 1.1 kWatt for 380 volt) for 50 Euros 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, 1455 Euros
             two speed model, 1885 Euros
         or with DIN65 male threads on inlet/outlet, extra 60 Euros - well worthwhile

Replacement impellers: Z-110, 111 Euros.

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

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

EP Mini: 1400 litres/hour, 3-phase 380 Volt, 1400 rpm, " bsp male threads, 432 Euros

EP Mini with bypass: 1020 litres/hour, 230 Volt, low rotation speed 900 rpm, " bsp male threads, 755 Euros

EP Midex: 3000 litres/hour, 1-phase 230 Volt, low rotation speed 900 rpm, DIN40 male threads, 740 Euros

EP Midex with bypass: 3000 litres/hour, 3-phase 380 Volt, low rotation speed 900 rpm, DIN40 male threads, 1040 Euros

EP Minor with bypass: 7000 litres/hour, 3-phase 380 Volt, low rotation speed 900 rpm, DiN50 male threads, 1220 Euros

EP Major with bypass: 18,000 litres/hour, 3-phase 380 Volt, low rotation speed 700 rpm, DIN65 male threads, 1769 Euros

optional extras:-

    wheeled trolley to mount the pump on.

    Electrical Float kit, wired up ready for use, 114 Euros
       + 55 Euros for an additional capacitor for starter protection; this is not needed if it's used with a JIM-G5 pump.

    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.

Internal bypasses on most rubber impeller 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):-

 

  230 Volt, without bypass:

 IP01, 0.37 kWatt, up to 1200 litres/hour, 699 Euros
 IP02, 0.55 kWatt, up to 2500 litres/hour, 729 Euros
 IP03, 0.75 kWatt, up to 5000 litres/hour, 879 Euros
 IP10, 2.2 kWatt, up to 10,000 litres/hour, 1199 Euros
 IP15, 2.2 kWatt, up to 15,000 litres/hour, 1199 Euros

  230 Volt, with bypass:

 IP03, 1.1 kWatt, up to 5000 litres/hour, 969 Euros
 IP10, 2.2 kWatt, up to 10,000 litres/hour, 1489 Euros


 

  380 Volt, without bypass:

 IP01, 0.37 kWatt, up to 1200 litres/hour, 639 Euros
 IP02, 0.55 kWatt, up to 2500 litres/hour, 769 Euros
 IP03, 0.75 kWatt, up to 5000 litres/hour, 749 Euros
 IP10, 1.5 kWatt, up to 10,000 litres/hour, 999 Euros

 IP15, 2.2 kWatt, up to 15,000 litres/hour, 1199 Euros
 IP20, 4.0 kWatt, up to 20,000 litres/hour, 1599 euros
 IP30, 5.5 kWatt, up to 28,000 litres/hour, 2399 Euros

 

  380 Volt, with bypass:

 IP03, 0.75 kWatt, up to 5000 litres/hour, 725 Euros
 IP10, 1.5 kWatt, up to 10,000 litres/hour, 995 Euros
 IP15, 2.2 kWatt, up to 15,000 litres/hour, 1190 Euros
 IP20, 4.0 kWatt, up to 20,000 litres/hour, 1460 Euros
 IP30, 5.5 kWatt, up to 28,000 litres/hour, 2300 Euros

  380 Volt, with Variable Frequency Drive:

 IP01, 0.75 kWatt, 300 to 1200 litres/hour, 1539 Euros
 IP02, 0.75 kWatt, 600 to 2500 litres/hour, 1429 Euros
 IP03, 0.75 kWatt, 1000 to 5000 litres/hour, 1299 Euros
 IP10, 1.5 kWatt, 2000 to 10,000 litres/hour, 2099 Euros

 IP15, 2.2 kWatt, 3000 to 15,000 litres/hour, 2299 Euros
 IP20, 4.0 kWatt, 4000 to 20,000 litres/hour, 2699 Euros
 IP30, 5.5 kWatt, 6000 to 28,000 litres/hour, 3899 Euros

Mounted on trolley:-

  IP01, IP02 and IP03, 139 Euros extra
  IP10, 149 Euros extra
  IP15, 159 Euros extra
  IP20 and IP30, 219 Euros extra

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

www.winegrowers.info