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Feiya Machinery provides high-performance gear pump units and aluminum pump housings for the global fuel dispensing industry. To ensure powerful suction and quiet operation, we manufacture pump bodies with exceptional structural density and geometric precision.
A gear pump's efficiency relies on the tight clearance between the gears and the chamber wall. Leveraging our 125 CNC Machining Centers, Feiya performs micron-level boring to achieve tolerances within 0.005mm. This precision eliminates internal leakage (slippage), ensuring the pump maintains a strong vacuum pressure even after years of service. Combined with our Low-Pressure Die Casting (LPDC) process for leak-proof housings, Feiya delivers durable, corrosion-resistant pumping solutions compatible with gasoline, diesel, and biofuels.
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Feiya delivers tailored gear pump solutions for global fuel dispenser manufacturers. Whether you require a compact 45L/min unit or a heavy-duty 90L/min suction pump, we engineer the aluminum pump housing to match your specific hydraulic footprint. Utilizing 27 shell core machines, we can integrate complex internal features—such as air separation chambers and bypass relief valves—directly into the casting body. This single-piece design reduces assembly components, minimizes leak paths, and ensures your fuel suction unit fits perfectly within the dispenser chassis.
Customization Capabilities Table:
| Customization Parameter | Feiya Manufacturing Standard & Options |
| Flow Rate Capacity | Housing Sizing:Scalable designs to support 45 LPM to 90+ LPM(Liters Per Minute) for standard or high-flow dispensers. |
| Integrated Features | Complex Coring:Ability to cast integrated air separators, check valves, and filter chambers directly into the pump body using Shell Core technology. |
| Bore Precision | Figure-8 Chamber:CNC boring tolerances ≤ 0.005mm. Ensures maximum vacuum efficiency and minimizes internal slippage. |
| Connection Interfaces | Port Design:Custom triangular or square flanges, NPT/BSP threading, and specific mounting bolt patterns to match your motor drive. |
| Material Specs | Aluminum Alloys:ADC12, A356 (T6 Heat Treatment available). Selected for high burst pressure resistance and fuel compatibility. |
| Surface Treatmen | Hard Anodizing:Recommended for the internal gear chamber to prevent scoring and extend the pump service life. |
| Pressure Rating | Validation:Custom pressure testing protocols (e.g., vacuum holding vs. positive pressure) based on your operational specs. |
The gear pump is the workhorse of the fuel dispenser. To ensure it delivers consistent suction lift and quiet operation, Feiya Machinery employs a rigorous manufacturing process centered on structural density and geometric precision.
Step 1: Hydraulic Simulation & DFM
Step 2: Complex Core Production
Step 3: High-Density Casting (LPDC)
Step 4: Precision "Figure-8" Boring
Step 5: Wear-Resistant Surface Treatment
Step 6: Pressure & Vacuum Validation
Feiya is a seasoned OEM manufacturer with 17 years of expertise in aluminum die casting. While renowned for our multi-platform motorcycle cylinder heads, our capabilities extend to automotive structural parts and precision fuel dispenser components. We provide complete end-to-end support—from mold development and high/low-pressure die casting to complex CNC machining and rigorous testing—delivering ready-to-assemble solutions for diverse industries.
Operating within a 17,000+ m² facility, Feiya integrates the complete aluminum manufacturing cycle—from in-house mold design and die casting (HPDC & LPDC) to precision CNC machining. Equipped with over 30 advanced casting units and 125+ CNC centers, we maintain an annual capacity exceeding 5,000 tons. This vertical integration allows us to strictly control production timelines and guarantee stable, scalable supply for your critical OEM projects.
Quality is the core of our operations. Feiya is ISO 9001 certified and recognized as a National High-Tech Enterprise and a Technology-Based SME in Zhejiang. We adhere to rigorous quality management systems to monitor every process, from raw material inspection to final tolerance checks. These credentials reflect our commitment to technical innovation and prove our reliability as a trusted partner for global automotive and industrial clients.
While both are used, the external gear pump offers superior durability in harsh environments. Unlike vane pumps which rely on sliding carbon blades that can wear out or stick, gear pumps use robust metal gears. This design handles dirty fuel with particulates better, providing consistent volumetric efficiency and higher discharge pressures over a longer service lifespan.
Pump cavitation is the primary cause of noisy operation. It occurs when vacuum pressure drops too low, creating air bubbles that implode. Feiya combats this by optimizing the suction port geometry via hydraulic simulation to ensure smooth flow. Additionally, our precision CNC boring ensures perfect gear alignment, eliminating mechanical gear meshing noise.
Yes. Our units are designed as self-priming fuel pumps. Thanks to the ultra-tight clearance (0.005mm) between the gears and the pump housing, they create a powerful vacuum immediately upon startup. This allows them to lift fuel from underground tanks without manual priming, ensuring rapid delivery for the fuel dispenser suction unit.
Absolutely. We supply aftermarket dispenser parts compatible with major global platforms. If you have a discontinued model, we can reverse-engineer the replacement pump head. Our 125 CNC centers allow us to replicate the exact mounting flanges and shaft dimensions, providing a "drop-in" solution for your fuel pump repair needs.
Leaks often occur at the casting joints or seals. Feiya uses single-piece Low-Pressure Die Casting (LPDC) for the pump body, eliminating porosity. Furthermore, we machine the O-ring grooves with extreme precision to ensure a static seal. This robust construction prevents air ingress that causes suction loss, ensuring the pump maintains prime even during idle periods.
In any positive displacement pump, theoretical flow differs from actual flow due to "slip."
·What is Slip?Slip occurs when fluid flows backward from the discharge side to the suction side through the tiny gaps between the gears and the housing.
·Controlling the Gap:To maximize volumetric efficiency, the clearance must be minimized. Feiya controls the gear tip clearance to microns. This reduces the slip path, ensuring that the pump maintains high pressure even when handling low-viscosity fluids like gasoline, which are more prone to slipping than diesel.
A common failure mode in gear pumps is adhesive wear, also known as galling. This happens when the steel gears micro-weld to the raw aluminum housing under high load.
·The Material Solution:Standard aluminum isn't enough. We utilize hardcoat anodizing(Type III) on the internal chamber. This process converts the surface into an aluminum oxide ceramic layer (up to 60-70 Rockwell C hardness).
·The Benefit:This creates a wear-resistant barrier that prevents aluminum galling, allowing the pump to handle abrasive particulates found in dirty underground tanks without scoring the chamber walls.
A gear pump behaves differently depending on the fluid viscosity index.
·Pumping Thin Fluids (Gasoline):Gasoline has low viscosity, which increases the risk of internal leakage. Our precision machining is critical here to maintain the vacuum seal.
·Pumping Thick Fluids (Diesel/Bio-diesel):Higher viscosity seals the gaps better but creates more drag. Our housing designs feature optimized inlet geometry to reduce flow resistance. This prevents the "starvation" phenomenon where the pump tries to pull more fluid than the inlet allows, ensuring smooth viscous fluid pumping without straining the motor.