Pedrollo TOP Submersible Drainage Pump 0.25-0.92 kW

Pedrollo TOP pump explained

The Pedrollo TOP is a submersible drainage pump for clear water without abrasive particles, rated up to 360 l/min (21.6 m³/h) and up to 15.5 m of head, with IP 68 protection. Models are TOP 1, 2, 3, 4 and 5 with single-phase motors of 0.25 to 0.92 kW. Seven Star LLC supplies the TOP in Oman and the GCC as an independent supplier in Muscat.

TOP 1 to 5 step up by power: 0.25, 0.37, 0.55, 0.75 and 0.92 kW, giving shutoff heads of 6.5, 8.5, 10.4, 13 and 15.5 m. TOP 1-2-3 drain down to 14 mm and have a maximum operating depth of 3 m, while TOP 4-5 drain down to 30 mm with a depth of 5 m. Suspended solids up to 10 mm can be passed.

TOP technical specifications

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

How the TOP works and what limits it

The housing is technopolymer, the impeller is Noryl, the motor sleeve is stainless steel AISI 304 and the shaft AISI 431. Motor cooling by the surrounding water and a double shaft seal are named in the manufacturer’s description. Liquid temperature is up to +40 °C, with +90 °C allowed for intermittent service of up to three minutes.

A submersible drainage pump has its motor and hydraulic end in one sealed unit that sits in the liquid itself. The surrounding liquid helps cool the motor, a double shaft seal separates the water from the windings, and the impeller moves the liquid up the delivery hose or pipe without any priming. The shape of the impeller sets what the pump can pass: a vortex or channel design leaves a free path for solids, whereas a closed multi-vane impeller gives more head on clean water. The data sheet therefore states both the maximum solid size and the draining capability, meaning the lowest level at which the pump still moves water.

TOP 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 TOP fits: related Pedrollo pumps

For stainless steel see the RX, for solids see the TOP-VORTEX and TEX, and for sewage see the BC and ZXm 2.

Selecting a TOP pump: checklist

• Choose TOP 1 to 5 from head
• Check draining capability, 14 mm or 30 mm
• Respect immersion depth 3 m or 5 m
• Single-phase supply only in the datasheet
• Choose with or without float switch if offered

Installing and maintaining the TOP

Place the pump on a firm base inside the sump, not directly on silt, so the inlet is not blocked. Connect a delivery pipe or hose of at least the port size, and add a non-return valve when the head is significant or when several pumps share one line. Use the float switch type recommended for the model and make sure the float swings freely and cannot catch the pipe or the cable. Never carry or lift the pump by the electric cable, keep the cable end above any possible water level, and respect the maximum immersion depth. Rinse the pump after dirty duty, clean the inlet area from time to time, and inspect the cable, float and seal before the flood season or before heavy use.

TOP applications in Oman and the GCC

Recommended for emergency drainage of small flooded areas such as rooms, basements and garages, disposal of household water from dishwashers and washing machines and emptying sumps. In Oman and the GCC this fits flash-flood clean-up after wadi events, pool backwash drains and small basement sumps.

Drainage pumps in Oman see two quite different duties: steady daily sump emptying, and rare but severe flood events after heavy rain in the wadis. For the second case a spare pump kept dry and tested beforehand matters more than anything else. Keep the electrical connection above the flood level, protect the supply with an earth-leakage device and keep sand away from the inlet.

Information to send with your TOP RFQ

• Required flow and delivery head including pipe losses
• Liquid: clear water, grey water or sewage, and the largest solid or fibre length expected
• Sump dimensions, operating depth and the delivery pipe size
• Supply: voltage, frequency and phase, and control type (float switch, panel)
• Duty cycle, number of pumps and delivery location

Documents and quotation

The manufacturer datasheet for the TOP 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.