Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of steimel gear pumps in China. We warmly welcome you to wholesale bulk steimel gear pumps for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
▔▔STEIMEL Gear Pumps (including the high-performance SF, T, and TF series) are premium rotary positive displacement pumps designed specifically for heavy-duty lubrication, fluid transfer, and precision industrial hydraulic circuits. Engineeered for high mechanical and volumetric efficiency, STEIMEL pumps excel in handling challenging media-ranging from low-viscosity fuels and standard hydraulic oils to high-viscosity polymers, synthetic lubricants, and bitumen. Operating across a broad speed and temperature spectrum, these pumps maintain consistent output, minimal pulse, and exceptional operational durability under demanding continuous-duty conditions.
Key Advantages
▔▔- Pulse-Free Precision Flow: Optimally designed gear geometry ensures smooth, uniform delivery with negligible flow ripple, ideal for sensitive dosing and lubrication circuits.
- Extreme Media & Viscosity Adaptability: Highly capable of handling fluid viscosities from 10 mm²/s up to 50,000 mm²/s with high suction capability.
- Low Noise & High Mechanical Efficiency: Precision-machined, hardened gear pairs and optimized internal clearances significantly reduce operating noise and wear.
- Robust Heavy-Duty Construction: Designed to endure demanding thermal and mechanical loads, offering extended service life and reduced maintenance intervals.
Technical Specifications
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| Parameter | Unit | Standard Series (SF / TF) | High-Viscosity / Heavy-Duty Series (T) |
| Max. Operating Pressure | bar | Up to 25 bar | Up to 40 bar |
| Flow Rate Range | L/min | 2.0 – 1,000 L/min | 10 – 600 L/min |
| Operating Temperature | °C | -20°C to +150°C (Standard) | -10°C to +250°C (High-Temp Option) |
| Viscosity Range | mm²/s (cSt) | 10 to 10,000 cSt | 100 to 50,000 cSt |
| Rotational Speed Range | RPM | 500 – 3,000 RPM | 200 – 1,800 RPM |
| Response Time (Pressure Build) | ms | < 15 ms | < 25 ms |
| Pressure Hysteresis | % | < 1.5% | < 2.0% |
Configuration Options
▔▔- Structural Designs: External gear pump configuration with optional integrated pressure relief/safety valves or dual-directional rotation.
- Control & Drive Options: Direct electric motor drive, variable-frequency drive (VFD) compatibility for speed-controlled dosing, or magnetic coupling for zero-leakage isolation.
- Feedback & Sensing Options: Optional integrated pressure sensors, temperature ports, or shaft rotation encoders for closed-loop hydraulic monitoring.
- Port / Connection Interfaces: Standard BSP/NPT threaded ports, DIN/SAE flanged connections, or custom sanitary/industrial manifolds.
- Mounting Configuration: Foot mounting, direct motor flange mounting (SAE / IEC adapter bellhousings), or vertical tank-top mounting.
- Electrical Specifications: Compatible with standard 3-phase AC motors (IE3/IE4 efficiency classes, 230/400V, 50/60Hz) and ATEX explosion-proof options.
Key Materials and Components
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- Pump Casing: High-grade spheroidal graphite cast iron (EN-GJS-400 / 500) for high structural stability and pressure tolerance, or alloy steel for specialized media.
- Gears & Drive Shafts: Case-hardened, precision-ground nickel-chrome alloy steel ensuring maximum fatigue resistance and anti-galling properties.
- Journal Bearings / Bushings: Heavy-duty bronze alloy or specialized PTFE-coated composite bushings for superior dry-run emergency lubrication and wear resistance.
- Shaft Seals: High-performance FKM (Viton) or PTFE radial shaft lip seals as standard; mechanical seals or magnetic couplings available for hazardous/corrosive fluids.
Packaging and Transport Protection
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- Protective Coating: Internal surfaces treated with anti-corrosion preservation oil; external metal surfaces coated with industrial primer/paint.
- Moisture Protection: Sealed in heavy-duty polyethylene vapor-corrosion-inhibitor (VCI) bags with desiccant packs to prevent oxidation during storage and transit.
- Shock & Vibration Absorption: Padded with high-density molded foam or custom-fitted wooden framing to isolate shaft ends and mounting faces from transport shocks.
- Bulk Packaging: Standard export-grade wooden crates (fumigated/ISPM-15 compliant) secured with steel/PET strapping for safe international freight.
Applications
▔▔- Wind Power Gearboxes: Applied as primary force-feed lubrication pumps to deliver controlled, continuous oil circulation to bearings and planet gears under dynamic thermal conditions.
- Heavy Machinery Hydraulic Systems: Used as auxiliary fill, pressure-feed, and cooling pumps in large hydraulic presses, rolling mills, and injection molding machinery.
- Polymer & Chemical Dosing Units: Utilized as high-precision metering devices for precise ratio delivery of resins, additives, and high-viscosity synthetic compounds.
- Marine & Power Generation: Deployed in heavy fuel oil (HFO) boosting, transfer, and burner feed systems, maintaining constant pressure under high temperature.
Related Models
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| Model Code | Series | Nominal Displacement (cm³/rev) | Max. Pressure (bar) | Rated Speed (RPM) | Port Connection | Typical Application |
| SF 2/2 RD | SF | 2.0 | 25 | 1,450 | G 1/2" Thread | Small lube loops & dosing |
| SF 2/8 RD | SF | 8.0 | 25 | 1,450 | G 1/2" Thread | Bearing lube & transformer oil |
| SF 2/13 RD-VLFM | SF | 13.0 | 25 | 1,450 | G 1/2" Thread | Motor-pump aggregates |
| SF 3/20 RD | SF | 20.0 | 25 | 1,450 | G 3/4" Thread | Gearbox force-feed lubrication |
| SF 3/25 RD | SF | 25.0 | 25 | 1,450 | G 3/4" Thread | Hydraulic cooling loop feed |
| SF 3/32 RD-VLFM | SF | 32.0 | 25 | 1,450 | G 3/4" Thread | Machine tool lube circulation |
| SF 4/40 RD | SF | 40.0 | 25 | 1,450 | G 1" Thread | Industrial oil transfer |
| SF 4/63 RD-VLFM | SF | 63.0 | 25 | 1,450 | G 1-1/4" Thread | Filter-cooler power units |
| SF 4/112 RD-VL | SF | 112.0 | 20 | 1,450 | DN 40 Flange | Heavy oil feed units |
| SF 6/100 RD | SF | 100.0 | 20 | 1,450 | DN 50 Flange | Marine engine lube systems |
| SF 6/160 RD | SF | 160.0 | 20 | 1,450 | DN 50 Flange | Bulk lube oil transfer |
| SF 8/250 RD | SF | 250.0 | 16 | 1,000 | DN 80 Flange | Turbine oil circulation |
| SF 10/500 RD | SF | 500.0 | 16 | 1,000 | DN 100 Flange | Industrial process pumping |
| TF 5/60 L | TF | 60.0 | 16 | 1,000 | G 1-1/4" Thread | Direct motor-mounted lube pumps |
| TFL 6-80 | TFL | 80.0 | 16 | 1,000 | Flange Connection | Compact hydraulic fill & flush |
| TFL 8/140 RDG | TFL | 140.0 | 16 | 1,000 | DN 65 Flange | High-flow lube circuits |
| T 1-60 | T | 60.0 | 16 | 1,000 | G 1-1/2" / Flange | Viscous resin & binder transfer |
| T 3-80 | T | 80.0 | 16 | 1,000 | DN 50 Flange | Bitumen & asphalt pumping |
| T 80/150 | T | 150.0 | 40 | 1,000 | DN 80 Flange | High-pressure heavy fluid circuits |
| T 10-240 | T | 240.0 | 16 | 750 | DN 100 Flange | High-viscosity polymer transfer |
FAQ
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What fluid viscosity range can STEIMEL gear pumps handle?
- Standard SF / TF Series: Optimal for viscosities between 10 cSt and 10,000 cSt (standard hydraulic oils, lubrication oils, diesel, synthetic lubricants).
- Heavy-Duty T Series: Designed for viscous media up to 50,000 cSt (polymers, bitumen, resins, heavy greases, molasses).
- High Viscosity Adjustment: When handling fluids above 1,000 cSt, reduce operating speed (RPM) to prevent cavitation and ensure proper filling of the gear tooth gaps.
What fluid filtration standard is recommended?
To prevent premature wear on precision-ground gear teeth and internal journal bearings, maintain an oil cleanliness level of ISO 4406 Class 19/17/14 (or NAS 1638 Class 8) using a suction line or system filter rated at 25 microns or finer.
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