Pedrollo PV Brass Peripheral Pump 0.18-0.75 kW

Pedrollo PV pump explained

The Pedrollo PV is a range of compact peripheral pumps with a brass pump body, brass impeller and brass seal cover, rated up to 45 l/min (2.7 m³/h) and up to 105 m of head. Models run from the PV 55 at 0.18 kW to the PV 70 and PV 90 at 0.75 kW. Seven Star LLC supplies PV pumps in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

The model numbers are PV 55, PV 60, PV 81, PV 65, PV 70 and PV 90, with the lower-case m (PVm) for single-phase 230 V and no m for three-phase. The PV 55 / PVm 55 is made for both 50 and 60 Hz. The higher numbers do not follow a simple scale, so use the head table: PV 60 gives 44 m, PV 81 gives 86 m, PV 65 gives 58 m, PV 70 gives 74 m and PV 90 gives 105 m at the first table point.

PV technical specifications

The values above come from the manufacturer technical data for the series. Individual models inside the PV range differ in power, head and current, so always confirm the exact model code before ordering.

How the PV works and what limits it

What makes the PV different from other peripheral pumps is the brass body, which is chosen for protection against rust and oxidation and for industrial uses such as cooling and air conditioning. The liquid range is -10 to +90 °C, the ambient range is -10 to +50 °C, the working pressure is up to 10 bar, and the suction lift is up to 8 m. The seal is silicon carbide, graphite and NBR on a 12 mm shaft, and three-phase models are designed to work with inverters.

A peripheral (side-channel) impeller is a disc with radial vanes cut around its rim. Liquid enters the vane pockets, is thrown outwards, returns and is re-accelerated many times in one revolution, which is why a small peripheral pump reaches a high head from a low flow and a modest motor. The trade-off is that the flow is small and the narrow clearances do not tolerate sand, fibres or scale. For the PV the liquid must therefore be clean and free of abrasive particles, and the suction line must be kept airtight so the pump can prime and hold its prime.

PV models and performance data

The heads in this table are read from the first point of the manufacturer 50 Hz performance table and fall as flow increases, so use the full curve for the real duty point. Where a 60 Hz version is needed, ask us: the manufacturer states that 60 Hz motors are available on request for many models.

Where the PV fits: related Pedrollo pumps

For cold water at lower cost see the PQ range with a cast iron body, and for larger flows in circulation work see the WR in-line pump. The PKm 60 covers the smallest 40 m duty.

Selecting a PV pump: checklist

• Choose the PV when the liquid is warm (up to 90 °C) or when a non-ferrous body is wanted
• Pick the model from the head you need: 44 m to 105 m across the range
• Select single-phase PVm or three-phase PV, and note that the PV 55 supports 50 and 60 Hz
• Confirm the circuit is clean water and the pressure stays within 10 bar
• Request IP X5 on PV 70 and PV 90 or an alternative seal if conditions require it

Installing and maintaining the PV

Mount the pump on a firm, level base with the motor shaft horizontal and the terminal box accessible. Keep the suction pipe as short and as direct as possible, rising continuously towards the pump with no air pockets, and fit a foot valve or a non-return valve when the pump sits above the water level. Fill the pump body with liquid before the first start, because a dry start damages the mechanical seal. Check the rotation direction on three-phase versions, protect the motor with a correctly rated overload device, and keep the motor ventilation path clear of dust. Plan to inspect the seal and the shaft end if the pump is used after a long idle period, since mineral deposits can bind the impeller.

PV applications in Oman and the GCC

In Oman and the GCC the PV is a useful choice for small chilled-water and cooling circuits, condensate and coolant transfer in workshops, and domestic hot-water recirculation where a brass body is preferred. The pump body can be rotated, which helps in cramped plant rooms. Use clean liquids only, as with every peripheral design.

Heat is the main enemy of small peripheral pumps in the Gulf. Direct sun on a pump house can push the motor beyond its stated ambient limit, so provide shade and airflow, and keep sand and dust away from the terminal box. Where the supply water is hard, scale will build up in the narrow vane clearances over time, and a periodic descaling or a filter ahead of the pump extends life.

Information to send with your PV RFQ

• Required flow rate and total head at the duty point, including static suction lift
• Liquid type, maximum temperature and any dissolved solids or chlorine
• Power supply: single-phase or three-phase, voltage and frequency (50 Hz or 60 Hz)
• Pipe size and thread type at suction and delivery
• Quantity, delivery location and whether a pressure tank, switch or control is also needed

Documents and quotation

The manufacturer datasheet for the PV is attached on this page, and the performance tables in it should be checked against your duty point. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.

Send the model code, quantity, voltage and frequency and the duty point, and we will confirm availability and prepare a quotation for Oman and the GCC.