Triple three screw oil transfer pump

Triple three screw oil transfer pump

In the field of industrial fluid transportation, tri-screw pumps are widely used in
industries such as fuel delivery, hydraulic lubrication, and chemical processing
due to their smooth operation, low pressure pulsation, and long service life.

1.1 Medium Characteristics

The medium characteristics are the primary basis for selection.

It is essential to clarify the medium's name, temperature, viscosity, lubricity,
corrosiveness, solid content, and particle size.

For instance, the pump material and structure may differ entirely when transporting
clean lubricating oil versus certain corrosive chemical raw materials.

Viscosity directly affects the pump's volumetric efficiency and suction
performance, serving as a key parameter for calculating flow rate and shaft power.

1.2 flow rate /capacity

Flow rate refers to the volume of liquid transported by a pump per unit time,
usually measured in cubic meters per hour or liters per minute.

When selecting, it is necessary to distinguish between theoretical flow and actual
demand flow.

The actual flow rate should be determined based on the innovative requirements of
the process system, taking into account a certain safety margin.

It should be noted that the viscosity of the medium has a significant impact on the
flow rate.

The flow rate indicated on the sample is usually data at a specific viscosity and
needs to be converted.

1.3 Pressure

The pressure indicators of a pump include outlet pressure and working pressure.

The outlet pressure is the total system resistance that the pump needs to overcome,
including pipeline friction loss, equipment resistance, and liquid level
difference.

The working pressure refers to the actual operating pressure range of the pump in
the system.

When selecting, the rated pressure of the pump should be slightly higher than the
innovative working pressure required by the system.

1.4 Speed

The speed, flow rate, and wear life of a pump are closely related.

High speed can achieve high flow rate, but it can also exacerbate wear and increase
the risk of cavitation; Low speed is beneficial for extending the service life of
the pump and improving suction capacity, but a larger pump size is required at the
same flow rate.

For high viscosity media, it is usually recommended to choose a lower rotational
speed.

2.1 Balance of viscosity speed efficiency

This is a core matching technique.

As the viscosity of the medium increases, the pump speed should be appropriately
reduced.

If the speed is not reduced, it will cause difficulty in suction, decreased
efficiency, and rapid temperature rise of the pump.

You can refer to the viscosity speed selection curve provided by the pump
manufacturer to determine the popular operating range.

The goal is to find a balance point that allows the pump to operate in the
efficient zone with minimal wear while meeting the flow rate requirements.

2.2 Compatibility between materials and media

Choosing the appropriate pump body material based on the corrosiveness and
abrasiveness of the medium is the key to ensuring its lifespan.

Common materials include ordinary cast iron, wear-resistant cast iron, stainless
steel, duplex steel, etc.

For example, when transporting seawater or corrosive chemicals, stainless steel or
higher grade materials should be selected; For conveying media with slight
abrasion, wear-resistant cast iron can be selected.

2.3 Selection of structural form

Three screw pumps have different structural forms, such as horizontal, vertical,
with heating jacket, etc.

Vertical pumps are suitable for situations with limited space or tank suction; If
the medium is prone to solidification at room temperature, it is necessary to
choose a model with insulation or heating jacket to ensure smooth start-up and
operation.

Minimum Order: 4500 sets

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