Silent Screw Pumps in Stock
Silent screw pumps are positive-displacement rotary pumps that move fluid along the axis of one or more intermeshing screws, delivering a smooth, continuous, and virtually pulse-free flow. Their gentle, low-shear pumping action and exceptionally quiet operation make them ideal for handling a wide range of fluids — from clean lubricating oils to viscous, abrasive, or shear-sensitive media. Our comprehensive inventory spans single, twin, and triple screw configurations, engineered to meet demanding industrial, marine, and process applications.
Hengyuhang combines robust manufacturing capacity with specialized engineering expertise to produce high-performance silent screw pumps. Manufactured to stringent international quality standards, our screw pumps deliver the reliability, efficiency, and long service life required to serve as direct, drop-in replacements for leading international brands. When standard equipment cannot meet specific technical demands, our facility designs and manufactures entirely custom screw pump solutions — from rapid prototyping to full-scale production — engineered strictly to your operational parameters and application needs.
What Is a Silent Screw Pump?
A silent screw pump is a positive-displacement pump that moves fluid using one or more rotating screws (rotors). Fluid is trapped in the sealed cavities formed between the screw threads and the pump housing, then carried smoothly along the screw axis from the inlet to the outlet. Because there is no high-impact metal-to-metal contact and the flow is continuous, screw pumps operate with very low noise and vibration, produce minimal pulsation, and handle the pumped medium gently — making them the preferred choice for applications requiring quiet, steady, and low-shear fluid transfer.
Types of Silent Screw Pumps
Screw pumps are generally classified by the number of screws they use.
Single screw pumps (also called progressive cavity or eccentric screw pumps) use one rotor turning inside an elastomeric stator. The rotor's eccentric motion creates sealed cavities that progress from suction to discharge, giving excellent suction lift, gentle handling, and the ability to pump viscous, abrasive, and even solids-laden fluids.
Twin screw pumps use two intermeshing screws that rotate without contact, transferring fluid in the sealed spaces between the threads. They offer high flow rates, wide pressure capability, and self-priming performance, and are widely used in marine, oil & gas, and industrial transfer duties.
Triple screw pumps use one driven screw and two idler screws that mesh around it. They provide a smooth, extremely quiet flow with minimal pulsation, making them the standard choice for hydraulic lifts, lubrication systems, and fuel-oil service where low noise is critical.
Within these families, screw pumps are available in fixed-flow and variable-flow (speed-controlled) versions, with horizontal or vertical mounting and a choice of materials to match the fluid and environment.
Applications of Silent Screw Pumps
Silent screw pumps serve a wide range of industries:
Marine and shipping — fuel-oil transfer, lubricating-oil service, cargo pumping
Oil & gas and petrochemical — crude, fuel, lubricant, and multiphase transfer
Power generation — turbine lube oil and fuel forwarding
Industrial lubrication and hydraulic systems
Food & beverage and pharmaceutical — gentle, low-shear transfer of sensitive media
Chemical processing — viscous, abrasive, and shear-sensitive fluids
Hydraulic lifts, machine tools, and coolant systems
Features of Silent Screw Pumps
Ultra-quiet operation with low vibration and pulsation
Smooth, continuous flow with minimal shear on the pumped medium
High efficiency and strong self-priming capability
Handles a wide viscosity range, including sensitive and abrasive fluids
Compact design with long service life and minimal maintenance
Direct interchangeability with leading international brand models
Techspecs of Silent Screw Pumps
Typical specification range (customized to each model):
| Parameter | Typical Range |
|---|---|
| Flow rate | 0.5 – 500 m³/h |
| Max. pressure | up to 16 bar (single/twin); up to 40 bar (triple) |
| Viscosity range | 1 – 100,000 cSt |
| Speed range | up to 3600 rpm |
| Operating temperature | -20 °C to +200 °C |
| Suction capability | self-priming |
| Mounting | horizontal / vertical / flange |
| Material | cast iron, ductile iron, stainless steel, etc. |
Contact us for the exact specification sheet of any specific model.
Screw Pump Replacement
Hengyuhang silent screw pumps are engineered as direct, dimensionally interchangeable replacements for leading international brands, delivering equal or better performance at a competitive price with long service life. Our replacement range covers:
SETTIMA — Hengyuhang silent screw pumps can be custom-built as direct, drop-in replacements for SETTIMA screw pumps, matched to your exact displacement, mounting, and performance requirements.
Simply tell us your existing model number, and we will match the correct interchange.
Screw Pump Selection Guide
To select the right silent screw pump, confirm the following parameters:
Required flow rate (m³/h) and pressure (bar)
Fluid viscosity and operating temperature
Fluid type — clean, viscous, abrasive, shear-sensitive, or corrosive
Number of screws — single, twin, or triple
Mounting orientation and drive speed
Material and sealing requirements
When in doubt, provide your existing pump model or application details, and our engineers will recommend the optimal match.
Screw Pump OEM Service
Hengyuhang provides high-quality silent screw pump OEM batch customization and production services. You can supply your own design and drawings, or let our engineering team design the pump to your specification. We offer flexible branding options — private label (your logo / part number) or no label — with full support from prototyping and testing to mass production and consistent quality control.
Screw Pump Manufacturer
Hengyuhang is a professional silent screw pump manufacturer and supplier, offering a complete range of standard and custom screw pumps with reliable quality, competitive pricing, and dependable delivery to customers worldwide.
FAQ of Silent Screw Pumps
1. What is a silent screw pump used for?
Silent screw pumps are used to transfer and pressurize fluids in marine, oil & gas, power generation, industrial lubrication, and chemical applications where quiet, pulse-free, low-shear pumping is required.
2. What is the difference between single, twin, and triple screw pumps?
Single screw pumps handle viscous and solids-laden fluids gently; twin screw pumps offer high flow and self-priming; triple screw pumps deliver the quietest, smoothest flow for hydraulic lifts and lubrication service.
3. Can your screw pumps replace other brands?
Yes. Our screw pumps are engineered as direct, dimensionally interchangeable replacements for leading international brands.
4. What fluids can a screw pump handle?
Screw pumps handle a wide viscosity range — from clean lubricating oils to viscous, abrasive, and shear-sensitive media, depending on the model and materials selected.
5. Do you offer custom or OEM screw pumps?
Yes. We offer OEM batch customization — you can provide the design, or we can design the pump to your specification, with optional private labeling.
6. What is the MOQ for OEM orders?
MOQ is flexible depending on the model and customization requirements. Contact us for a tailored quotation.
7. What is your lead time?
Lead time depends on quantity and customization. Standard models ship quickly; custom orders are confirmed at quotation.
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