Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of steimel gear pump in China. We warmly welcome you to wholesale bulk steimel gear pump for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
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The STEIMEL Gear Pump series is a heavy-duty, high-precision positive displacement fluid conveyance unit engineered for demanding industrial hydraulic circuits, high-viscosity media transfer, and precise volumetric dosing. Positioned as a premium industrial-grade gear pump solution, the STEIMEL series specializes in low-to-high pressure circulation, precise dynamic pressure control, and reliable lubrication feed in closed-loop or open-loop hydraulic systems. Built for extreme operational conditions and tough fluid media, it features high volumetric efficiency, low pulsation, and robust continuous duty capability, making it the ideal selection for critical precision hydraulic control and fluid power machinery.
Key Advantages
▔▔- High Volumetric & Mechanical Efficiency: Optimized gear tooth profile reduces internal leakage and hydraulic losses across full speed and pressure ranges.
- Broad Viscosity & Temperature Tolerance: Effortlessly handles thin hydraulic fluids to heavy lubricants, bitumen, polyols, and high-viscosity resins.
- Low Pulsation & Quiet Operation: Precision-ground gears deliver smooth, continuous flow output and low operational noise levels.
- Heavy-Duty Construction: Rugged housing design with reinforced bearings ensures long service life under high shaft loads and shock conditions.
Technical Specifications
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| Parameter |
Standard Light Duty Series |
Heavy Duty / High Viscosity Series | High Pressure Hydraulic Series |
| Operating Displacement (cm3/rev) | 2 to 60 | 30 to 500 | 5 to 120 |
| Maximum Working Pressure (bar) | Up to 25 | Up to 80 | Up to 250 |
| Rated Flow Rate (L/min at 1450 rpm) | 2.9 to 87 | 43.5 to 725 | 7.25 to 174 |
| Operating Temperature Range (degrees C) | -20 to +120 | -10 to +220 | -20 to +80 |
| Viscosity Range (mPa.s / cSt) | 10 to 1,000 | 10 to 50,000 | 10 to 800 |
| Hysteresis (%) | Less than 1.5 | Less than 2.0 | Less than 1.0 |
| Flow Response Time (ms) | 15 to 30 | 30 to 60 | 10 to 20 |
| Maximum Speed (rpm) | 3,000 | 1,800 | 3,000 |
Configuration Options
▔▔- Structural Layout: External gear pump and internal gear pump configurations available, with inline, horizontal, or vertical mounting orientations.
- Control Method: Fixed displacement delivery; adaptable to variable-speed electric motors, frequency drives (VFD), or proportional hydraulic drive motors for active flow modulation.
- Feedback & Monitoring: Optional dynamic speed sensors, integrated thermal probes, and port-mounted pressure transducers for closed-loop control.
- Flow Range Options: Modular frame sizes covering displacements from small precision dosing feeds up to large high-volume transfer pumps.
- Port & Interface Styles: Standard ISO / DIN flanged ports, BSPP threaded connections, SAE flange patterns, and custom manifold block mountings.
- Mounting Arrangements: Foot mounting (B3), flange mounting (B5 / B14), or custom bell-housing adapter rings for standard IEC/NEMA motor frames.
- Electrical Configuration: Compatible with standard 3-phase AC motors, explosion-proof motors (ATEX certified), or DC hydraulic power unit units.
Key Materials and Components
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- Pump Body / Housing: High-density spheroidal graphite cast iron (EN-GJS / Ductile Iron) or cast steel for structural strength under high pressure; optional 316 Stainless Steel for corrosive media.
- Gears & Shafts: Case-hardened alloy steel, precision-ground and surface-treated for maximum wear resistance, high torsional rigidity, and reduced friction.
- Journal Bearings / Bushings: Heavy-duty bronze alloy, special carbon composite, or multi-layer PTFE coated steel bushings designed for superior boundary lubrication and load capacity.
- Shaft Sealing Systems: High-performance Viton (FKM) radial shaft lip seals, PTFE double lip seals, or customizable mechanical seals (Tungsten Carbide vs. Silicon Carbide) for high-temperature and chemical applications.
Packaging and Transport Protection
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- Anti-Corrosion Protection: Exposed metal surfaces and internal chambers are treated with vapor corrosion inhibitor (VCI) oil; the unit is sealed inside a heavy-gauge VCI vacuum moisture barrier bag.
- Shock & Vibration Isolation: High-density customized foam inserts secure the pump inside a heavy-duty corrugated outer container or reinforced wooden crate.
- Secure Mounting: Larger pump units are bolted directly to a wooden skid or wooden base plate to prevent internal movement during freight transport.
- Bulk Packaging: Multi-unit standard shipments are stacked on heat-treated ISPM-15 compliant pallets, corner-reinforced, and fully stretch-wrapped with strapping bands for export safety.
Applications
▔▔- Machine Tool Hydraulic Systems: Provides continuous main system hydraulic pressure and lubrication for CNC lathe spindles, hydraulic clamping, and guide way lubrication.
- Wind Turbine Power Generation: Serves as the primary oil forced-circulation pump for wind turbine gearbox lubrication and oil cooling conditioning circuits.
- Plastics & Polyurethane Processing Machines: Functions as the high-accuracy metering pump for liquid polyols, isocyanates, and additives in polyurethane foam metering units.
- Heavy Metallurgy & Rolling Mills: Utilized in heavy-duty oil lubrication stations to deliver high-volume, continuous oil feed to heavily loaded mill roll bearings.
- Bitumen & Chemical Processing Equipment: Functions as the main asphalt/bitumen feed pump, maintaining stable flow output against varying backpressures in road construction and chemical processing machinery.
Related Models
▔▔| Model Series | Description / Type | Displacement (cm3/rev) | Max Pressure (bar) | Typical Application |
| STEIMEL SF 2/20 | Standard External Gear Pump | 20 | 25 | Engine lubrication & dynamic fluid circulation |
| STEIMEL SF 4/80 | Medium Flow Gear Pump | 80 | 25 | Industrial oil filtration & transfer systems |
| STEIMEL SF 6/150 | Heavy Flow Transfer Pump | 150 | 20 | Bulk oil transfer & cooling loops |
| STEIMEL TF 5/50 | High-Viscosity Gear Pump | 50 | 40 | Bitumen, resin, and polymer dosing |
| STEIMEL BKF 2.5 | High Pressure Hydraulic Pump | 12.5 | 210 | Machine tool hydraulic power packs |
| STEIMEL TFL 3/40 | Low Noise Internal Gear Pump | 40 | 100 | Precision servo-hydraulic control systems |
FAQ
▔▔Q1: How do I select and confirm the correct STEIMEL pump model for my system?
A: Model selection depends on required flow rate (L/min), maximum operating pressure, dynamic fluid viscosity, liquid temperature, and drive motor speed. Providing your current fluid properties and system duty cycle will allow our engineering team to verify the exact model code.
Q2: What level of oil filtration is required for STEIMEL Gear Pumps?
A: To maximize pump life and prevent premature gear wear, hydraulic oil systems should maintain a cleanliness level according to ISO 4406 Class 18/16/13 or better. An inline suction filter (125 to 150 microns) and a high-efficiency pressure line filter (10 to 25 microns) are strongly recommended.
Q3: What types of hydraulic oil and media are compatible with these pumps?
A: STEIMEL gear pumps are compatible with standard mineral hydraulic oils (HL, HLP), synthetic esters, bio-oils, lubricating oils, heavy fuel oils, and high-viscosity resins. For non-standard media or aggressive chemicals, custom seal configurations (FKM, PTFE, or mechanical seals) must be specified.
Contact Us
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