All Pumps Machinery Company Limited.

ST-4 (4inch x 4inch) Heavy Duty Solids Handling Trash Pumps

All Pumps Machinery Supply ST-4 (4" x 4") Heavy Duty Solids Handling Trash Pumps.

The ST-4 self-priming pump is one of our most popular self priming trash pump. This pump is an excellent choice for many different environments, including tank trucks, buried tanks, oil pans, and more. The ST-4 self-priming pumps are available in low and high pressure configurations and can also meet various pressure and flow specifications. 

high suction self priming water pump
automatic self priming water pump
centrifugal pump with self priming
centrifugal regenerative self priming pump

ST-4 Self-priming Pumps Applications

  • Waste water treatment;

  • Mining industry;

  • Sprinklers;

  • Fire righting Department;

  • Above and below ground;

  • Clean water project;

  • General industrial.

While learning about all the uses and benefits of the ST-4, we invite you to take a look at our other professionally built centrifugal pumps. Don't worry if you're not sure which pump is best for your specific needs. We have a team of friendly and knowledgeable application engineers who can help you find the perfect match. We'll use your Conditions of Service to determine the most efficient and cost-effective solution, whether it's a submersible sewage pump, irrigation pump, or whatever.

For more information on the ST-4 or any of our other centrifugal pumps, please contact us today.

Other self-priming pump model and size ST-2(2" x 2"), ST-3(3" x 3"), ST-6(6" x 6"), ST-8 (8" x 8"), ST-10(10" x 10"), SU-3(3" x 3"), SU-4(4" x 4"), SU-6 (6" x 6"), Super ST-3(3" x 3"), Super ST-4(4" x 4"), Super ST-6(6" x 6"), Super ST-8(8" x 8"), Super ST-10(10" x 10") also available.

Specification of ST-4 (4'' x 4'') Heavy Duty Solids Handling Trash Pumps

Pump Connection Size

4" x 4" (100mm x 100mm)

Max. Pump Flowrate

163m3/h (717.74 GPM or 45.278L/S)

Max. Pump Head

36m (118.1 feet)

Speed Range

650rpm to 1950rpm

Bare Pump N.W

310kg(684.327 lbs)

Impeller Type

Semi Open

Impeller Diameter


Max. Temperature

176°F / 80°C

Max. Solids-handling

Capabilities up to 76.2mm(3")

Materials of Construction

Cast Iron, Cast Steel, Ductile Iron, Stainless Steel 304/316, CD4MCu

Structure of ST SU Self Priming Pump


ST Series Curves

SU Series Curves

Dimension of ST-4 (4'' x 4'') Heavy Duty Solids Handling Trash Pumps

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