Pedrollo JSW 3 Self-Priming Jet Pump 1.1-2.2 kW

Pedrollo JSW 3 pump explained

The Pedrollo JSW 3 is the larger self-priming jet pump in the JSW range, built for flows up to 160 l/min (9.6 m³/h) and heads up to 97 m with a 10 bar working-pressure limit. Power runs from 1.1 kW to 2.2 kW across nine models. Seven Star LLC supplies the JSW 3 in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

The JSW 3 code carries two letters. The first letter (C, B or A) sets the power: C is 1.1 kW, B is 1.5 kW and A is 2.2 kW. The second letter (L, M or H) selects the hydraulic range: in the datasheet table L gives the lowest head with the highest flow, M is intermediate and H gives the highest head. So JSW 3AH is 2.2 kW with a 97 m head, and JSW 3CL is 1.1 kW with a 44 m head. A lower-case m makes the pump single-phase.

JSW 3 technical specifications

The values above come from the manufacturer technical data for the series. Individual models inside the JSW 3 range differ in power, head and current, so always confirm the exact model code before ordering.

How the JSW 3 works and what limits it

Materials are cast iron for the body and the cover, a stainless steel AISI 304 impeller, a Noryl ejector and an AISI 431 shaft. Limits are suction up to 9 m, liquid -10 to +40 °C, 10 bar working pressure and IP X4, with IPX5 available on request. The L, M and H versions let the designer choose between flow and pressure without changing the power class.

A self-priming jet pump combines a centrifugal impeller with an ejector fitted in the pump body. Part of the delivery flow is recirculated through the ejector nozzle, which creates the depression that draws air and water up the suction line, so the pump can evacuate the suction pipe and prime itself after the body has been filled once. Because the pump tolerates air mixed into the suction flow, it suits wells, tanks and cisterns where the water level changes. The suction lift is limited to the manometric value on the data sheet, and the check valve at the end of the suction line keeps the pipe full between starts.

JSW 3 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 JSW 3 fits: related Pedrollo pumps

For smaller duty see the JSW 1-2, for the all stainless version see the JCR, and for a multistage alternative with lower noise see the PLURIJET 90-120.

Selecting a JSW 3 pump: checklist

• Choose the power (1.1, 1.5 or 2.2 kW) from the motor budget
• Choose L, M or H from the head and flow curve
• Check the 9 m suction limit and the 10 bar pressure rating
• Single-phase JSWm or three-phase JSW
• Ask for IPX5 on request if the pump is exposed to splashing

Installing and maintaining the JSW 3

Install the pump close to the water source on a rigid base with the motor shaft horizontal. Use a suction pipe of at least the pump port size, laid with a constant upward slope and with all joints sealed, because any air leak lengthens priming time or stops it altogether. Fit a foot valve or check valve at the lower end of the suction pipe and a strainer to keep debris out of the ejector. Fill the pump body through the filling plug before the first start. On three-phase versions confirm the rotation direction. When the pump feeds a pressure tank, set the pressure switch and tank pre-charge to suit the duty so the unit does not cycle too often, and drain the pump in cold weather or when it will stand unused.

JSW 3 applications in Oman and the GCC

The JSW 3 suits larger villa and farm supplies, irrigation systems with sprinklers, and tank-to-tank transfers in commercial buildings where a self-priming pump is needed. The 97 m maximum head can feed pressure tanks serving several outlets. In the Gulf climate keep the liquid below 40 °C by avoiding long exposed above-ground pipes.

Many Omani villas and farms use a ground tank with a transfer pump, and a self-priming pump is practical because the suction line can drain and refill with air. The main risks are warm water above the stated limit, sand from wells, and suction leaks. Shade the pump, fit a strainer, and check the foot valve for scale every year.

Information to send with your JSW 3 RFQ

• Flow and delivery pressure required at the point of use
• Water source (well, tank, cistern), suction lift and suction pipe length and diameter
• Liquid temperature and quality, including any sand in the source
• Supply: single-phase or three-phase, voltage, frequency
• Pressure tank, switch or control accessories needed, and the quantity required

Documents and quotation

The manufacturer datasheet for the JSW 3 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.