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P350
cissoko
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The P350 Series Gear Pump is an ultra-heavy-duty, fixed-displacement cast iron gear pump. Positioned as a step up from the P330 series, the P350 features larger gears and a wider body. It is engineered to deliver higher flow rates while maintaining exceptional structural integrity in severe fluid power applications.
High Power-to-Weight Ratio: Delivers massive hydraulic power and high flow outputs relative to its physical footprint.
Superior Contamination Tolerance: The heavy-duty journal bushings are much more forgiving of fine fluid particulate contamination compared to standard roller-bearing or aluminum pumps.
Versatile Mounting & Shafts: Comes standard with SAE C (2-bolt or 4-bolt) mounting flanges and heavy splined or keyed shafts to handle high input torque loads.
Common Applications: Widely used in high-demand machinery such as large dump trucks, oil field equipment, material handling systems, aggregate crushers, and refuse vehicles.
| Parameter | Specification / Value | Notes |
|---|---|---|
| Pump Type | P21 Series High Pressure Gear Pump | Compact cast iron body, roller bearing design |
| Displacement Options | 8 / 11 / 14 / 19 / 24 cc/rev | Multiple compact displacement grades |
| Max Continuous Pressure | 250 bar (3,625 PSI) | High pressure rating for compact size |
| Max Intermittent Pressure | 280 bar (4,060 PSI) | Peak transient pressure capability |
| Speed Range | 500 - 3,500 RPM | Wide speed range for various engine applications |
| Mounting Flange | SAE A 2/4-Bolt Combination | Standard compact SAE A mounting interface |
| Drive Shaft | 3/4" 11T Spline / 5/8" Keyed Shaft | Multiple shaft options for compact PTO mounts |
| Rotation | Bi-Rotational (Dual Rotation) | Field-reversible rotation direction |
| Fluid | Mineral / Anti-Wear Hydraulic Oil | Recommended viscosity: 10-68 cSt |
| Housing Material | High Strength Cast Iron | Doweled construction for precise gear alignment |
Applications
P350 pumps are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the pump from environmental damage.
Custom Crates: For larger, heavier pumps, ensuring safe handling.
Documentation: Includes installation, maintenance instructions, and warranty details.
Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.
Bearing Load Limitations: Wider gears expose a larger surface area to high-pressure oil, generating significantly higher radial hydraulic forces inside the pump.
Preventing Shaft Deflection: Running a wide gear (like the 2-1/2" size) at 3,500 psi would generate enough bending force to microscopically flex the gear shafts.
Housing Protection: If the shafts flex, the gear tips will score and cut into the cast iron housing, leading to catastrophic failure. Lowering the pressure for wider gears protects the structural integrity.
Larger Drive Shaft: The P350 utilizes a beefier SAE C standard shaft (14-tooth spline, 1-1/4" outer diameter), compared to the smaller SAE B shaft (13-tooth spline, 7/8" diameter) on the P330.
Higher Torque Capacity: The SAE C input shaft can transmit much higher cumulative rotational torque, minimizing the risk of the main shaft shearing when driving multiple stacked pump sections.
Expanded Bearing Area: The journal bearings in the P350 provide a larger support surface area to absorb heavy composite loads from tandem setups.
Check Inlet Pipe Size: Since the P350 flows up to 65 GPM (246 L/min), a restrictive or undersized suction hose will starve the pump, vaporizing the oil and causing cavitation.
Inspect Suction Strainer: P350 pumps often operate in harsh environments (e.g., dump trucks, mining). A clogged inlet filter will block flow and cause the pump to suck air or pull a vacuum.
Cold Start Viscosity: In low temperatures, thick hydraulic oil cannot travel fast enough into the large gear pockets. Preheating the system or switching to an appropriate multi-grade oil is necessary.
Extreme Flow Drop Under Load: The pump may deliver adequate flow at low pressure, but as system pressure increases, the cycle times of your cylinders will slow down drastically due to internal oil bypassing.
Rapid Heat Generation: High-pressure oil slipping past worn thrust plates back into the suction side creates severe friction, causing the pump body to become extremely hot to the touch.
Golden Particles in Filter: Finding tiny brass or bronze metallic flakes in your return-line filter is a definitive sign that the thrust plates or bushings are disintegring.
Measure the Mounting Pilot: The P350 uses an SAE C flange, which features a mounting pilot diameter of exactly 5 inches (127 mm), whereas the P330 measures 4 inches.
Verify Input Shaft Diameter: A standard 14-tooth splined input shaft on a P350 will have an outer diameter of approximately 1.25 inches (31.75 mm).
Measure Gear Housing Width: Measure the thickness of the center gear section. For example, a housing thickness of 2 inches (50.8 mm) indicates a displacement of 83.9 cc/rev (5.12 in³), which matches the "-20" model code modifier.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
P350 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the pump does not contain hazardous materials.
Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.
1.What's our advantages?
Factory established in 2005;
With a great deal of production experience;
80+ employees become the professional team;
Constant updated ERP system ensure efficiency of work;
Sophisticated equipment ehanced the accuracy of products;
Professional salesmen provide the greast service;
With a large number of famous customers all over the world;
Great after-sales service;
With the long term cooperation with famous logistics and express company in China,provide the better goods service.
Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.
Of course we can. Just send me your logo we can make it for you.
America(40.5%):USA, Canada, Argentina, Brazil
Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.
Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.
Others(5.8%).
The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.
The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.
Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.
Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.
