HENVO / INDUSTRIAL FLOW SYSTEMS

Screw Pump

What is a Screw Pump?

A screw pump uses rotating screw-shaped elements to move liquid through the pumping chamber. Construction matters: this HENVO collection includes G single-screw, 2W twin-screw and several three-screw or three-spindle listings, including 3G, 3GB, 3GCL, SM and SN. Buyers should first distinguish the mechanism and intended medium, then compare the flow and pressure duty. A slurry-labelled G product and an oil-labelled three-screw product are separate selection paths; neither the name nor a shared series range establishes identical handling capabilities.

Applications

Oil-transfer systems

3G and 3GB screw-oil listings and 3GCL vertical oil listings support oil-transfer enquiries. Specify lubrication characteristics, viscosity and system pressure for the selected family.

Sludge and mud transfer

The collection includes explicitly named G sludge, mud and slurry products. Particle size, solids concentration and material compatibility still need model-specific review.

Heated or viscous-liquid duties

A 3G asphalt listing and a 3GB high-viscosity listing identify this selection route. Provide the liquid’s temperature and viscosity profile, including startup, before requesting a configuration.

How to Select the Right Pump?

Selection depends on the following operating conditions. Keep the units and pressure reference explicit when sending your requirement.

Distinguish the screw family
Start with G single-screw, 2W twin-screw or the named three-screw family. Do not transfer a capability from one construction to another.
Describe the liquid completely
Identify viscosity, lubricating properties and any solids. For sludge or mud, include concentration, particle size and whether properties change during transfer.
Match flow and pressure together
State the required flow at the intended pressure difference. Keep working pressure, discharge pressure and head labels distinct when comparing published data.
Review operating temperature
Provide normal, minimum and maximum liquid temperatures. Check wetted materials and any sealing or stator materials used by the selected construction.
Specify drive and operating cycle
Send the electrical supply, proposed speed and continuous or intermittent duty. Confirm the actual model’s drive requirements rather than borrowing a motor rating from another listing.
Compare a different mechanism where useful
Gear Pump listings provide another route for oil transfer, while Rotary Lobe Pump listings may be relevant to viscous process liquids. Review the medium and sealing requirements before switching families.

Technical Considerations

Medium and startup conditions

Prepare liquid identity, viscosity with its reference temperature, density and solids information. Include temperature changes or settling between operating cycles.

Hydraulic duty

Provide flow, inlet pressure, discharge pressure and the piping arrangement. Include the intended operating schedule and system pressure-control provisions.

Exact family and configuration

Name the G, 2W, 3G, 3GB, 3GCL, SM or SN listing of interest. Request confirmation of the mechanism, wetted materials, sealing and drive for that specific product.

Procurement Questions

Are all products in this collection the same screw-pump technology?

No. The collection includes single-screw, twin-screw and three-screw or three-spindle product names. Their constructions and medium requirements must be assessed separately.

Can I use every screw pump for sludge or slurry?

The G sludge, mud and slurry listings identify products to discuss for those media. Their names do not specify every permissible solid, particle size or concentration, and those uses should not be extended to the oil-pump families.

How should I provide viscosity and temperature?

Give viscosity with units and its measurement temperature, plus the minimum, normal and maximum process temperatures. Include startup conditions if the liquid thickens or changes consistency while stopped.

What determines the required screw-pump model?

The liquid, screw construction, flow and pressure duty must be considered together. Supply inlet conditions, drive requirements and operating hours so the published ranges can be narrowed to a model.

When is it useful to compare gear and rotary lobe pumps?

Gear options are relevant comparisons for oil-transfer enquiries, and lobe options may be relevant for viscous process liquids. Compare the actual medium and construction rather than assuming equivalent performance or handling capability.