Single phase self-priming screw pump

Single phase self-priming screw pump is a small high-pressure oil transfer pump/water pump driven by 220V civilian single-phase electric drive, with self-priming capability and a positive displacement screw structure. It is characterized by high suction range, high head, small flow rate, self-priming and no filling. It is commonly used in households, agriculture, and small industries, especially suitable for pumping diesel, engine oil, well water, and boosting water supply.

1. Core principle

A continuous sealed chamber is formed by the meshing of the rotor (metal screw) and the stator (rubber liner);

The motor drives the rotor to rotate, and the chamber moves from the suction end to the discharge end, forming negative pressure suction at the inlet and squeezing discharge at the outlet. Start up without the need for water injection, it can directly extract air and liquid, with a self-priming height of 4-8m, much stronger than centrifugal pumps.2. Key Parameters (Household/Small Industry)

Voltage: 220V/50Hz single-phase electricity

Power: 0.75-3kW (commonly 1.1/1.5/2.2kW)

Flow rate: 1-10m ³/h

Head: 30-120m (high-pressure type can reach 150m)

Self suction height: 4-8m (dry suction does not require oil/water filling)

Diameter: DN25-DN40 (1-1.5 inches)

Material: pump body cast iron/stainless steel, stator nitrile rubber (oil resistant), mechanical seal Oil resistant adhesive

III. What media can be extracted

✅ Diesel, engine oil, hydraulic oil, edible oil (low/medium viscosity)

✅ Clear water, well water, river water (mild impurities ≤ 0.1%)

✅ Mild corrosive liquid (weak acid weak base, optional stainless steel type)

❌ Large particles, strong corrosion, high temperature (≤ 40 ℃), dry to air pumping

4. Advantages (compared to centrifugal pumps/ordinary self-priming pumps)

Strong self-priming: 4-8m suction stroke, no need for bottom valve, first fill the pump chamber, and then no filling.

High pressure and high head: small flow rate, high pressure, suitable for high-rise boosting, long-distance oil delivery, and high-pressure flushing.

. Smooth operation: no pulsation, low noise (≤ 65dB), minimal vibration, and can operate continuously for a long time.

Oil resistant and practical: Rubber stator is oil resistant and wear-resistant (based on actual reports), mechanical seal is leak proof, suitable for oil transportation.

. Compact and portable: small in size and light in weight (15-30kg), can be moved or fixedly installed.

Fifth, Typical Application Scenarios

Household/Villa: Well water intake, tap water boosting, high-rise water supply, garden irrigation.

Small oil depots/construction sites: diesel and engine oil transfer, matching refueling machines, field pumping (220V power supply).

Agriculture: orchard irrigation, pesticide transportation, small-scale drainage. Commercial: hotels, canteens, car wash shops, high-pressure flushing and water supply.