Cast Iron Hydraulic Gear Pump: Reliable, High-performance Solution
Fairy Deer Benefits Of Cast Iron Hydraulic Gear Pump
Robust cast iron construction for superior strength and long service life, ideal for continuous high-pressure operations up to 300 bar or more;
Excellent sealing technology with advanced floating sleeve design and high-quality imported seals to prevent oil leakage and ensure system reliability;
Versatile installation options including various port connections, SAE and ISO mounting standards, and flexible shaft types to fit your equipment perfectly;
High efficiency and low noise operation with heat-treated alloy steel gears and pressure-balanced thrust plates for smooth, quiet, and efficient fluid transfer;
Wide application scope suitable for heavy-duty mobile machinery, automated manufacturing, agricultural equipment, and more;
COMPARISON
Pressure Capacity:
Cast iron hydraulic gear pumps and aluminum alloy hydraulic gear pumps differ significantly in key performance aspects, with cast iron showing clear advantages. Cast iron housings, typically made from high-strength ductile iron, can withstand continuous pressures above 250 bar and peak pressures up to 280-300 bar, making them ideal for heavy-duty and high-stress industrial environments. In contrast, aluminum alloy pumps have lower pressure tolerance and are generally suited for medium to low-pressure applications, unable to meet the demands of high-pressure systems.
Wear Resistance & Lifespan:
Regarding wear resistance and service life, cast iron pumps outperform aluminum alloy models. The hardness of cast iron combined with heat-treated gears greatly enhances wear resistance and extends pump lifespan, reducing maintenance frequency and downtime costs. Aluminum alloy pumps, being softer, wear out faster and require more frequent maintenance, increasing operational expenses.
Sealing Performance:
Sealing performance is critical for hydraulic system reliability. Cast iron pumps often feature advanced imported seals and floating sleeve designs that effectively prevent oil leakage under high temperature and pressure, ensuring system safety. Aluminum alloy pumps have comparatively weaker sealing, making them more prone to leakage and reliability issues.
Structural Stability:
In terms of structural stability, cast iron housings offer superior rigidity and resistance to deformation and vibration, suitable for harsh environments like mining and construction machinery. Although aluminum alloy pumps are lightweight, their lower rigidity makes them susceptible to deformation from shocks and vibrations, negatively impacting lifespan and performance stability.
Heat Dissipation:
Aluminum alloy excels in heat dissipation due to its higher thermal conductivity, making it suitable for light-load, high-speed applications. However, cast iron pumps maintain stable operation under high pressure and heavy load, often paired with cooling systems to manage temperature effectively.
Weight & Installation:
cast iron pumps are heavier and require careful consideration during installation for load and vibration absorption but provide excellent stability for fixed heavy equipment. Aluminum alloy pumps are lighter and easier to install or move, better suited for weight-sensitive applications.
Spur gear pumps feature straight-cut gears with teeth perpendicular to the shaft axis. Their simple design makes them cost-effective and easy to maintain, widely used in applications handling low to medium viscosity fluids. They tolerate particulates well and provide reliable flow in less demanding environments. However, spur gear pumps tend to generate higher noise and vibration levels during operation, and their fluid flow pulsations can affect system smoothness and component lifespan.
In contrast, helical gear pumps have angled teeth that engage more gradually and smoothly, significantly reducing noise and vibration. The increased tooth contact area distributes load more evenly, enabling stable flow at higher pressures and speeds with improved volumetric efficiency. Helical pumps also offer better sealing performance, minimizing leakage and extending service life. Their drawbacks include higher manufacturing costs, more complex structures, and relatively greater maintenance requirements.
From the perspective of selection, helical gear pumps are preferable where noise reduction, vibration control, and high-pressure stable operation are critical. Spur gear pumps offer a cost-effective solution when budget constraints exist and noise or pulsation tolerance is acceptable. Both types are fixed displacement pumps suitable for consistent flow demands in hydraulic systems, but helical pumps provide superior performance and user experience.
Internal gear pumps consist of an internal gear, an external gear, and a crescent-shaped partition. The internal gear drives the external gear to rotate in the same direction, creating sealed chambers that deliver fluid smoothly. Their key advantages include low flow pulsation, reduced noise, and stable operation, making them ideal for applications requiring system stability and quiet performance. With larger gear meshing areas and superior sealing, internal gear pumps exhibit lower leakage and higher volumetric efficiency. They are widely used in agriculture machinery, marine, aerospace, and precision equipment. Compact size and lighter weight also facilitate installation in space-constrained environments.
External gear pumps feature two external gears meshing externally, offering a simpler structure with lower manufacturing and maintenance costs. They can handle higher discharge pressures and are well-suited for pumping higher viscosity fluids. Common applications include construction machinery, hydraulic systems, and industrial equipment. Although external gear pumps tend to have higher noise and flow pulsation and are generally larger, their robust design ensures durability in harsh conditions and ease of maintenance, making them preferred for heavy-duty tasks.
Consider your project, internal gear pumps are better suited where smooth flow, noise control, and high volumetric efficiency are priorities, especially in limited space. External gear pumps are preferable for high-pressure output, handling viscous fluids, and where maintenance convenience is critical. Both types are fixed displacement pumps; selecting the right pump depends on specific working conditions, budget, and maintenance considerations.
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Cast Iron Hydraulic Gear Pumps - Diverse Industries Including Construction, Agriculture, Manufacturing, And Heavy Machinery
Discover our premium Cast Iron Hydraulic Gear Pumps, engineered for diverse industries including construction, agriculture, manufacturing, and heavy machinery. Designed to deliver reliable high-pressure performance, these pumps feature robust cast iron housings, heat-treated alloy steel gears, and advanced sealing systems to ensure durability, low leakage, and long service life. Experience efficient, quiet operation with low maintenance needs—ideal for demanding hydraulic applications requiring stable flow and strong wear resistance. Optimize your equipment with our eco-friendly, cost-effective cast iron gear pumps built to withstand harsh environments and heavy workloads.
Construction Machinery - Excavator
Drive hydraulic arm and bucket movements.
Construction Machinery - Crane
Provide stable hydraulic flow to control boom movement.
Agricultural Machinery - Tractor
Used to lift and control agricultural implements (such as plows and seed drills), providing stable hydraulic power.
Agricultural Machinery - Sprinkler System
Sed to pressurize pipes to convey water or fertilizer solutions, adapting to the high durability requirements of outdoor dust environments.
Industrial Hydraulic System - Chemical Processing
Transporting high-viscosity chemicals (such as resins and asphalt), corrosion-resistant design.
Industrial Hydraulic System - Lubrication System
Transporting lubricants in factory machinery, suitable for high-viscosity (up to 1,500 mm²/s) fluids.
Mobile Equipment - Heavy-Duty Truck
Used in hydraulic lifting systems for dump trucks.
Mobile Equipment - Forestry Machinery
Hydraulic actuators that drive logging equipment.
Chemical & Food Processing - High-Viscosity Fluids
Smooth delivery of chocolate, syrup, and oil to reduce shear damage.
Chemical & Food Processing - High-Temperature Media
For example, asphalt pumping, using heating or jacket design to prevent solidification.
FAQs
Yes, cast iron gear pumps are designed for high-viscosity fluids (such as asphalt, grease, syrup), with a typical viscosity range of 1,000-10,000 cP, and reduce fluid resistance through wide tooth gaps and enhanced sealing technology.
Standard cast iron gear pumps are suitable for non-corrosive media (such as water, mineral oil). If you need to transport acids, alkalis or solvents, it is recommended to choose coating treatment (such as epoxy resin) or upgrade to a stainless steel gear pump.
The regular maintenance cycle is every 500 hours of operation. The main steps are:
Check seal wear;
Clean impurities in the gear cavity (to prevent jamming;
Monitor bearing temperature (lubrication is required for abnormal temperature rise);
The pressure range of the standard model is 10-25 MPa (such as HGP-200 series), and the high-pressure version can reach 30 MPa (custom reinforced housing is required).
Typical applications: construction machinery hydraulic system, industrial stamping equipment.
The standard pump withstands temperatures from -20°C to 150°C. High-temperature scenarios (such as asphalt pumping) can be configured with a jacket heating/cooling system, which can be extended to 200°C.
Note: Long-term high temperature requires regular inspection of sealing materials (such as replacing nitrile rubber with fluororubber).
Cast Iron Gear Pumps are relatively cheap (about $200-800) and are suitable for non-corrosive environments such as agriculture and construction, but they have limited corrosion resistance and are heavy. Stainless Steel Gear Pumps are more expensive ($1,000+), but have excellent corrosion resistance and lightweight design, making them more suitable for harsh working conditions such as the chemical, pharmaceutical, and food industries.
Customization is supported on demand:
Flow rate: 0.5-200 L/min (achieved by adjusting the gear width/speed);
Interface: flange (ANSI/DIN), thread (NPT/BSP), quick-connect;
Drive mode: electric, diesel, PTO drive;
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