Introduction

The Eagle Pumps Cast Iron Gear Pump is a rugged, reliable positive displacement pump engineered for demanding industrial applications. Constructed from high-grade ductile iron with precision-machined components, these pumps deliver consistent performance in petroleum processing, chemical manufacturing, industrial lubrication, and heavy-duty fluid transfer operations. The robust cast iron construction provides exceptional strength, wear resistance, and thermal stability while offering superior value compared to stainless steel alternatives. With hardened steel gears, heavy-duty bearings, and proven seal technology, the CI Series gear pump is built to withstand harsh operating conditions and deliver years of trouble-free service. The pump's positive displacement design ensures accurate, repeatable flow rates across a wide viscosity range, making it ideal for metering, batching, circulation, and transfer applications in industrial environments.

Applications

The Cast Iron Gear Pump excels in transferring petroleum products, lubricating oils, hydraulic fluids, fuel oils, crude oil, heavy fuel, resins, polymers, asphalt, bitumen, adhesives, paint, varnish, printing inks, cutting oils, gear oils, grease, wax, paraffin, and other industrial fluids. The pump's robust construction handles high pressures and elevated temperatures common in industrial processes, while its positive displacement action ensures consistent flow regardless of viscosity variations or system back-pressure. The gentle pumping action minimizes product shear and heat generation, preserving fluid characteristics in temperature-sensitive applications. The CI Series Gear Pump handles viscosities from 1 cP to 1,000,000 cP, flow rates up to 100 m³/h, and pressures up to 25 bar, with special high-pressure models available for demanding applications.

Benefits

• Economical alternative to stainless steel for non-corrosive fluids.
• Exceptional strength and durability for heavy-duty service.
• High-pressure capability up to 25 bar.
• Superior thermal stability for elevated temperature applications.
• Self-priming with excellent suction characteristics.
• Reversible flow direction for versatile operation.
• Low maintenance with readily available spare parts.
• Proven reliability in harsh industrial environments.

Standard Design

The pump body, front and rear covers are manufactured from high-grade ductile iron (GGG-40 or ASTM A536 Grade 65-45-12), providing exceptional strength-to-weight ratio and impact resistance. Internal components are precision-machined and hand-fitted to maintain tight clearances (typically 0.002-0.005 inches) for maximum volumetric efficiency. The gears are manufactured from hardened alloy steel (case-hardened to 58-62 HRC) with precision-ground tooth profiles to minimize wear, noise, and pulsation while maximizing service life.

The standard Eagle CI Gear Pump features external gear design with both gears driven by synchronized timing gears housed in a separate, oil-lubricated gearbox. This design eliminates metal-to-metal contact between pumping gears, extending gear life and reducing maintenance. The timing gearbox is typically cast iron or aluminum with sealed ball bearings and ISO VG 220 lubricating oil. Heavy-duty shaft seals prevent oil contamination of the pumped fluid.

Standard shaft sealing includes packing gland (braided graphite or PTFE) with lantern ring for flush/quench. Optional mechanical seals (single or double) are available for applications requiring zero-leakage performance. All seal configurations accommodate thermal expansion and provide long service life in demanding conditions.

The Eagle CI Gear Pumps are supplied as bare shaft pumps or as complete pump sets mounted on fabricated steel baseplates with motor, coupling, guard, relief valve, suction strainer, pressure gauge, and piping accessories for turnkey installation.

Technical Data

Flows / Pressures / Connections (CI Series)

Performance Characteristics