Pedrollo HF Centrifugal Medium Flow Pumps
Pedrollo HFm 51B Single Phase 2101770
- Established 1975
- Trusted by thousands of customers
The Pedrollo HFm 51B is a medium-flow centrifugal pump. It has a 0.55 kW (0.75 HP) motor on a 230 V single-phase supply. It delivers up to 300 l/min and 18.2 m head.
It suits furrow and sprinkler irrigation, and drawing water from lakes, rivers and wells. It also handles industrial jobs that need high flow at medium-low head.
More about this product
Product overview
The Pedrollo HFm 51B is a medium-flow centrifugal pump with a 0.55 kW (0.75 HP) motor. It runs on a 230 V single-phase supply. It covers 50 to 300 l/min, with a working head of 17.2 m down to 5.4 m.
Pedrollo design the HF for civil and agricultural use. Its high efficiency and continuous duty suit furrow and sprinkler irrigation. It also draws water from lakes, rivers and wells.
Key features
Typical applications
Technical specifications
| Brand / Series | Pedrollo — HF Medium Range |
| Model | HFm 51B |
| Pedrollo code | 2101770 |
| Supply | 230 V single-phase |
| Motor power (P2) | 0.55 kW / 0.75 HP |
| Motor | 230 V single-phase motor, IE2 efficiency, with thermal protection in the winding |
| Flow range | 50–300 l/min |
| Head range | 17.2–5.4 m |
| Current | 4.7 A at 230 V |
| Maximum head | 18.2 m |
| Pump body | Cast iron with ISO 228/1 threaded ports |
| Cover | AISI 304 stainless steel |
| Impeller | AISI 304 stainless steel |
| Mechanical seal | AR-14, Ø 14 mm, ceramic / graphite / NBR |
| Motor shaft | AISI 431 stainless steel |
| Ports | 1½″ suction, 1½″ delivery |
| Suction lift | Manometric suction head up to 7 m |
| Liquid temperature | −10 °C to +90 °C |
| Ambient temperature | Up to +40 °C |
| Maximum working pressure | 6 bar |
| Insulation / protection | Class F / IP X4, continuous duty S1 |
| Liquid | Clean water |
| Weight | 12.9 kg |
| Available on request | Mechanical seal options; other voltages and 60 Hz |
HF medium range
| Model | Code | Supply | Power | Flow | Head |
|---|---|---|---|---|---|
| HFm 50B | 2101750 | Single Phase | 0.37 kW / 0.5 HP | 50–300 l/min | 10–4 m |
| HFm 50A | 2101760 | Single Phase | 0.55 kW / 0.75 HP | 50–300 l/min | 12–6 m |
| HFm 51B | 2101770 | Single Phase | 0.55 kW / 0.75 HP | 50–300 l/min | 17.2–5.4 m |
| HFm 51A | 2101780 | Single Phase | 0.75 kW / 1 HP | 50–300 l/min | 20.2–8.4 m |
| HFm 70C | 2101790 | Single Phase | 1.1 kW / 1.5 HP | 50–300 l/min | 28–15 m |
| HFm 70B | 2101800 | Single Phase | 1.5 kW / 2 HP | 50–300 l/min | 32–19 m |
| HFm 5B | 2101810 | Single Phase | 0.75 kW / 1 HP | 100–500 l/min | 13.2–5 m |
| HFm 5A | 2101820 | Single Phase | 0.9 kW / 1.25 HP | 100–600 l/min | 15.4–4.3 m |
| HFm 5BM | 2101830 | Single Phase | 1.1 kW / 1.5 HP | 100–600 l/min | 18.5–6 m |
| HFm 5AM | 2101840 | Single Phase | 1.5 kW / 2 HP | 100–600 l/min | 21.5–10 m |
| HFm 5ARM | 2101845 | Single Phase | 2.2 kW / 3 HP | 100–700 l/min | 23–10 m |
| HF 50B | 2101850 | Three Phase | 0.37 kW / 0.5 HP | 50–300 l/min | 10–4 m |
| HF 50A | 2101860 | Three Phase | 0.55 kW / 0.75 HP | 50–300 l/min | 12–6 m |
| HF 51B | 2101870 | Three Phase | 0.55 kW / 0.75 HP | 50–300 l/min | 17.2–5.4 m |
| HF 51A | 2101880 | Three Phase | 0.75 kW / 1 HP | 50–300 l/min | 20.2–8.4 m |
| HF 70C | 2101890 | Three Phase | 1.1 kW / 1.5 HP | 50–300 l/min | 28–15 m |
| HF 70B | 2101900 | Three Phase | 1.5 kW / 2 HP | 50–300 l/min | 32–19 m |
| HF 70A | 2101910 | Three Phase | 2.2 kW / 3 HP | 50–300 l/min | 38–25 m |
| HF 5B | 2101920 | Three Phase | 0.75 kW / 1 HP | 100–500 l/min | 13.2–5 m |
| HF 5A | 2101930 | Three Phase | 0.9 kW / 1.25 HP | 100–600 l/min | 15.4–4.3 m |
| HF 5BM | 2101940 | Three Phase | 1.1 kW / 1.5 HP | 100–600 l/min | 18.5–6 m |
| HF 5AM | 2101950 | Three Phase | 1.5 kW / 2 HP | 100–600 l/min | 21.5–10 m |
| HF 5ARM | 2101955 | Three Phase | 2.2 kW / 3 HP | 100–700 l/min | 23–10 m |
Head shown as the working range from minimum to maximum flow. Performance to Pedrollo 50 Hz data.
Frequently asked questions
What is it for?
Irrigation, drawing water from lakes, rivers and wells, and industrial high-flow transfer.
Can it lift water from below?
Yes. Manometric suction head is up to 7 m.
What is the maximum working pressure?
6 bar.
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Data Sheet PDFDownload
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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Frequently Asked Questions
Quick answers to common questions about the Pedrollo HFm 51B Single Phase 2101770. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.
What are centrifugal pumps used for?
Centrifugal pumps use a rotating impeller to move liquids and are commonly used for water transfer, circulation and industrial processes.
How do I choose a centrifugal pump?
Compare the required flow rate, total head, liquid characteristics and electrical supply with each pump’s performance curve.
Are centrifugal pumps suitable for dirty water?
Some are designed for clean water only, while others handle solids or wastewater. Check the particular pump’s permitted liquid and solids specification.