Hydro Pelton Wheels

What is a Pelton Wheel?

detailed diagram: Pelton wheel

Our Pelton wheel (or Pelton runner) is a cast epoxy impeller designed to provide efficient performance on micro-hydro Pelton wheel water turbines.

The wheel is suitable for nozzles up to 13mm diameter with nozzle aligned such that jet strikes runner in centre of bucket as shown.


The wheel is made to fit a 15 mm shaft. Correct attachment to the generator shaft is important. Thick stainless steel or galvanised washers of at least 25 mm outside diameter should be used on both sides of the wheel to distribute pressure evenly over the casting. A spring washer is essential. The nut should be tightened to 6.5 N/m torque (firm with a 160 mm spanner).


Correct alignment of the water jet is important with this design of impeller, both to achieve maximum efficiency and to prevent possible damage to the blade edge of the runner buckets. The nozzle must be adjusted so that the jet strikes the wheel tangentially 57 mm from the centre of the wheel. Check also that the jet impinges on the centre line of the runner buckets. A clearance of at least 65mm is recommended between runner and turbine case.

sketch: Pelton wheel


  • Impeller Material: Cast Epoxy Resin Composite
  • Diameter: 133 mm
  • Shaft Diameter: 16 mm
  • Key way Width: 4.76 mm ( 3/16th inch)
  • Hub Depth: 22 mm
  • Nozzle Alignment: 57 mm tangentially to centre of shaft

The pelton wheel can be bought from Flowtrack.

We install solar systems in Northern NSW and Southern QLD.

Gold Coast (from Coolangatta to Southport), Nerang and Hinterland (Beaudesert) and out West (Warwick, Stanthorpe, Killarney)

Northern NSW (Tweed Heads to Yamba, including Evans Head, Byron Bay and Ballina); the Far North Coast Hinterland (Grafton via Lismore to Murwillumbah) and out West (Casino to Tenterfield, including Drake and Tabulam, as well as Woodenbong and Bonalbo)

For larger system we also go up to Brisbane or down to Coffs Harbour and even Glen Innes. Other places by arrangement.

We are Open for Business

Rainbow Power Company would like to assure our customers that we are trading (not quite as normal). System designers are working from home and can customise a quote for you (free of charge) over the phone and online. We are still dispatching and posting items, with safety precautions in place. You can still order online or over the phone, and pick up items from RPC (our show room is closed however, and appointments must be made to pick up orders). We are still doing site inspections, keeping the recommended social distancing.

Contact us

This is the perfect time to start thinking about your power needs for the future, reducing your bills, and safeguarding against future power outages, so call today and get in before the oncoming solar rush. PH: 02 6689 1430 or send an enquiry
..stay safe and healthy, your RPC family