Industrial Pump Buying Guide for Global Buyers

Fix the Duty Point Before You Compare Models

Every reliable industrial pump purchase starts from the same operating data, because flow, head and fluid properties decide both the pump family and the size. An incomplete duty point is the most common reason a new pump underperforms in service.

• Flow rate in cubic metres per hour, including the normal, maximum and minimum operating cases.
• Total head in metres, or discharge pressure in bar, covering the static and friction components of the system.
• Liquid name, temperature and specific gravity at the coldest and hottest operating conditions.
• Viscosity — the single biggest technology switch in industrial pump selection.
• Available NPSH, solids content, and whether the fluid is corrosive, abrasive or shear-sensitive.
• Utility conditions: voltage, frequency, protection class and installation orientation.

If translating this data into a pump type feels uncertain, follow the structured industrial pump selection process first.

Centrifugal or Positive Displacement — the First Decision

Industrial pumps divide into two operating families. Centrifugal pumps spin an impeller that throws liquid outward and converts velocity into pressure; positive displacement (PD) pumps trap a fixed volume and force it out against the discharge pressure, so flow is largely proportional to speed. Each family owns a set of duties:

• Centrifugal pumps suit clean water and thin, low-viscosity process liquids that need continuous, non-pulsating flow.
• Gear and screw pumps take over for viscous oils, resins, pastes and slurries where centrifugal efficiency collapses.
• Lobe pumps add gentle, low-shear handling for shear-sensitive and hygienic products.
• Special-material pumps handle corrosives with stainless or fluoroplastic-lined wetted parts.

For water and process duties, Qingdao Green Power publishes its IS/ISW industrial centrifugal pump series at 1.5–1600 m³/h, 2–125 m head and liquid temperatures up to 80 °C. Above roughly 150 cSt, centrifugal performance falls sharply and a gear or screw pump becomes the correct answer — the high-viscosity pump guide covers that crossover in detail.

Match the Pump Series to the Service

Once the pump family is clear, the next step is matching a concrete series to the service using published, verified ranges.

The table uses verified figures published by Qingdao Green Power. For a specific project duty, confirm current model availability and specifications with Qingdao Green Power before procurement.

What a Global Buyer Should Verify Before Ordering

Cross-border buying adds checks that a domestic purchase never raises. Beyond price, evaluate what determines whether the pump arrives on time and runs for years:

• Engineering behaviour — does the supplier ask for your duty data, or quote blindly from a model number?
• Verifiable data — published specification tables, performance curves, drawings and material options.
• Export experience — documentation, seaworthy packing and experience shipping to your region.
• Spares and support — availability of seals, impellers, stators and wearing parts, and a real channel for technical questions.
• Lifecycle cost — operating efficiency and expected maintenance, not only the first invoice.

Send a Complete RFQ and Compare Like for Like

A precise request for quotation gets a precise answer. The data the manufacturer needs mirrors the duty list above: flow rate, total head or discharge pressure, liquid name and temperature, specific gravity and viscosity, available NPSH, solids content, and the motor voltage, frequency and protection class for your country. Include installation orientation and site constraints, and compare quotations on the same duty point rather than on model numbers alone.

Qingdao Green Power engineers review each inquiry against published series ranges and confirm the recommendation before quoting. Send your requirements with the duty data to start the process.

Frequently Asked Questions