Pelton Turbine

The Pelton turbine is the high-head specialist: where a mountain stream drops a long way with a modest flow, a Pelton converts that pressure into a high-velocity jet efficiently, instead of requiring a large low-head runner.

One or more nozzles convert the penstock pressure into free jets. Each jet strikes the splitter at the centre of the double-cup buckets around the runner, splits in two and is deflected back on itself, giving up almost all of its kinetic energy. Flow is regulated by a spear valve moving inside the nozzle, while a deflector flicks the jet off the buckets instantly if the load is rejected, so the unit does not overspeed while the spear closes slowly enough to avoid water hammer. Large Peltons serve heads well above 150 metres, and micro Peltons work effectively down to roughly 20 metres of head, with peak efficiencies commonly around 85–90% and excellent part-flow behaviour. Fine trash rack protection is essential, because the bar spacing must be smaller than the nozzle opening.

• Sizing jets, runner and speed to high head and low flow
• Double-cup buckets with splitter; nozzle and spear regulation
• Deflector for safe load rejection without water hammer
• Erosion-resistant runner and nozzle materials
• Test, supply and commissioning with generator and controller

What you receive: a Pelton set — nozzle and spear, deflector, runner with buckets, shaft and bearings, casing — matched to the site's head, flow and speed, with performance data, installation and maintenance documentation and wear spares.

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• Trash Rack System →
• Control System →
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