Single Screw Hose

Updated: 2026-07-21

Overview

The single screw hose pump is a specialized positive displacement pump designed for handling challenging fluids in industrial settings. Unlike conventional pumps, it uses a rotating screw mechanism combined with a flexible hose to move materials with minimal shear and pulsation. This design makes it particularly suitable for shear-sensitive, viscous, or abrasive fluids that might damage other pump types. Industries ranging from food processing to chemical manufacturing rely on these pumps for their consistent performance and gentle product handling.

Structure and Working Principle

The pump consists of three main components: a helical screw rotor, a flexible rubber or PTFE hose, and a stator housing. As the screw rotates within the hose, it creates sealed cavities that progress along the hose length, pushing the fluid forward. This peristaltic action provides several advantages including complete containment of the pumped medium, excellent suction capabilities, and the ability to handle fluids with high solid content. The design eliminates the need for mechanical seals or valves, significantly reducing maintenance requirements.

Key Features

Single screw hose pumps offer several distinctive features that make them valuable for industrial applications. Their gentle pumping action preserves the integrity of shear-sensitive materials like food products, cosmetics, or pharmaceutical ingredients. These pumps are self-priming and can run dry for short periods without damage. The contained design prevents leakage and makes them ideal for handling hazardous or expensive materials. Additionally, flow rate can be precisely controlled by adjusting the rotation speed.

Application Areas

In the food industry, these pumps handle delicate products like yogurt, fruit preparations, and dough without damaging their structure. Chemical plants use them for transferring aggressive acids, alkalis, and abrasive slurries. Wastewater treatment facilities employ single screw hose pumps for sludge transfer and chemical dosing. Other applications include paint production, cosmetics manufacturing, and mining operations where abrasive materials need reliable pumping solutions.

Maintenance and Precautions

Regular inspection of the hose is critical as it's the primary wear component. Look for signs of cracking, swelling, or reduced elasticity which indicate replacement is needed. Always ensure proper alignment between the screw and hose to prevent premature wear. Avoid running the pump dry for extended periods, though brief dry running won't typically cause damage. For abrasive fluids, consider more frequent hose replacements as part of maintenance planning.

B2B Procurement Guide

When sourcing single screw hose pumps, clearly define your process requirements including flow rate, pressure, and fluid characteristics. Consider pumps with variable speed drives for applications requiring flow adjustment. Evaluate hose material compatibility with your process fluids - options range from natural rubber for food applications to specialized compounds for chemical resistance. For reference, mid-range industrial models typically cost between $5,000-$10,000, with prices varying based on size, materials, and additional features.