Pedrollo PLURIJET 90-120 Multistage Self-Priming Pump

Pedrollo PLURIJET 90-120 pump explained

The Pedrollo PLURIJET 90-120 is a multistage self-priming pump with a stainless steel AISI 304 housing, impellers and cover, rated up to 130 l/min (7.8 m³/h) and up to 52 m of head. Four models are listed: PLURIJET 3/90, 4/90, 3/120 and 4/120. Seven Star LLC supplies them in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

In a code such as 4/120, the first number is the number of stages (3 or 4) and the second is the hydraulic size (90 or 120). The 90 pumps give the higher head at lower flow, the 120 pumps more flow. The datasheet shows 3/90 at 0.48 kW (40 m), 4/90 at 0.55 kW (52 m), 3/120 at 0.55 kW (38 m) and 4/120 at 0.75 kW (50 m).

PLURIJET 90-120 technical specifications

The values above come from the manufacturer technical data for the series. Individual models inside the PLURIJET 90-120 range differ in power, head and current, so always confirm the exact model code before ordering.

How the PLURIJET 90-120 works and what limits it

The pump is made for clean water and safe liquids, is described as highly reliable and quiet, and works with small to medium pressure tanks. Diffusers are Noryl, the shaft is AISI 431, the limits are 9 m suction lift, liquid -10 to +60 °C, ambient up to +40 °C, 6 bar working pressure and IP X4. Compared with a single-impeller jet pump, the multi-stage design gives a more stable pressure curve.

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.

PLURIJET 90-120 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 PLURIJET 90-120 fits: related Pedrollo pumps

Other self-priming options are the JSW 1-2, JSW 3 and JCR. For a constant-pressure unit see the VSP, which can be supplied with PLURIJET hydraulics according to the manufacturer’s range.

Selecting a PLURIJET 90-120 pump: checklist

• Choose the stage count and size (3/90, 4/90, 3/120, 4/120) from the duty point
• Check suction lift of up to 9 m
• Verify the 6 bar pressure and 60 °C temperature limit
• Single-phase PLURIJETm or three-phase PLURIJET
• Match the pressure tank and switch to the head

Installing and maintaining the PLURIJET 90-120

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.

PLURIJET 90-120 applications in Oman and the GCC

In the GCC the PLURIJET suits villa water supply from an underground tank, irrigation from a cistern and farm houses, where low noise and a stainless body are preferred over a basic cast iron jet pump. Keep the suction line free of air and the liquid at 60 °C or below.

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 PLURIJET 90-120 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 PLURIJET 90-120 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.