Gear pumps are well-suited for oil, viscous fluids, and lubricants thanks to steady flow, self-priming capability, and high viscosity handling capacity. Each fluid requires the right pump type, material, and accessories. See the overview on the gear pump page.
Lubricating Oil & Hydraulic Oil
External gear for high pressure, stable operation — supplies lubricating oil, hydraulic oil, and thermal oil to machinery and furnaces. Cast iron/steel construction, oil-resistant seals.
Bitumen & Hot Bitumen
Bitumen solidifies at ambient temperature — use internal gear with heating jacket (steam/thermal oil) to keep the fluid at operating temperature. Seals and materials rated for heat according to the fluid.
Viscous Fluids & Viscous Food Products
Adhesives, syrups, honey, chocolate — internal gear with smooth flow and low product shear; select sanitary-grade stainless steel for food applications. Reduce rotational speed for highly viscous fluids.
Operation Notes
Avoid dry running; install a pressure relief valve; for viscous fluids, ensure the suction line is large enough to prevent pump starvation. Maintain gears, bushings, and seals per manufacturer recommendations.
For guidance on choosing external/internal gear type, see the article on how to select a gear pump. Thái Khương Pumps is an authorized distributor of products imported from EU/G7 countries.
Gear Pump Lines Available in Vietnam
Thái Khương Pumps is the authorized distributor of Tuthill (USA) — internal gear pumps for oil, liquid resins, adhesives, and high-viscosity fluids:
Internal gear, smooth and self-priming — multiple material grades and jacket heating options per application. View model specifications →
Internal gear, smooth and self-priming — multiple material grades and jacket heating options per application. View model specifications →
Maintenance focuses on gear-bushing clearance: a drop in flow rate at constant speed indicates that clearance has increased. Send fluid type + viscosity + temperature via the consultation request to select the correct size and material.
Frequently Asked Questions
Which fluids are gear pumps suitable for?
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All types of oil, bitumen, molasses, adhesives, liquid resins, viscous chemicals — clean fluids free of hard particles. For abrasive particles, consider a screw pump or diaphragm pump.
What periodic maintenance does a gear pump require?
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Inspect gear and bushing clearance according to operating hours — increased clearance causes a drop in flow rate at the same speed. Seals or mechanical seals and the internal relief valve should be checked at the same interval.
Are spare parts for Tuthill gear pumps available?
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Thái Khương Pumps is the authorized distributor of Tuthill (USA) gear pumps and maintains a stock of over 5,000 spare part codes (SKU) — send the model to match bushings, seals, and gears by serial number. View the spare parts catalog.
Spare parts for gear pumps: see the catalog of in-stock items by model.
Send your application specifications — Thái Khương Pumps engineers will advise on configuration + provide a quotation with CO-CQ within 24 hours. Request a Quotation →
