Hydraulic Gear Pump Buyer's Guide: Selection, Types & Specifications for Indonesia
What Is a Hydraulic Gear Pump?
A hydraulic gear pump is a positive-displacement rotary pump that uses two meshing gears to move pressurized hydraulic fluid through industrial systems. Unlike centrifugal pumps, gear pumps maintain consistent flow regardless of pressure changes, making them ideal for high-pressure applications in Indonesia's demanding industrial and agricultural sectors. Brands like Pratissoli, Interpump, and Delta dominate the market with proven designs operating reliably in tropical climates and heavy-duty environments. 3G Electric stocks multiple models from these trusted OEMs, serving customers across Jakarta, Surabaya, Batam, and regional centers with full import documentation and English-language technical support.
How Hydraulic Gear Pumps Work
Gear pumps operate by trapping hydraulic fluid in the pockets formed between two rotating gears (one driving gear and one driven gear) and a fixed housing. As gears rotate, they create expanding and contracting chambers that draw fluid from the inlet and force it toward the outlet at high pressure. This mechanical process is self-regulating: the pump delivers the same volumetric flow at any stable RPM, regardless of system pressure (until the pump's pressure relief valve opens). External-gear designs are most common in industrial applications, offering high efficiency, compact size, and excellent durability in harsh tropical environments typical across Indonesia.
Key Specifications & Performance Table
| Parameter | Typical Range | Unit | Notes |
|---|---|---|---|
| Displacement | 6–50 | cm³/rev | Volume per full gear rotation |
| Operating Pressure | 150–350 | bar | Rated working pressure; relief at max |
| Flow Rate | 10–50 | L/min | At 1000–1500 rpm |
| Shaft Speed | 500–3500 | rpm | Depends on motor or engine drive |
| Volumetric Efficiency | 90–95 | % | Internal leakage and wear factor |
| Weight (dry) | 4–25 | kg | Varies by displacement and housing |
Types & Industrial Applications in Indonesia
External-Gear Pumps are the most common type, with gears outside a crescent-shaped housing. They suit industrial machinery, construction equipment, and mobile hydraulics. Internal-Gear Pumps have one gear inside another, offering quieter operation and smoother flow; used in sensitive instrumentation. Gerotor Pumps combine eccentric rotors with low noise and compact design, popular in agricultural and vehicle hydraulic systems across Indonesia's plantations and construction sites. Agricultural applications—rice mills, sugarcane crushers, irrigation systems in Java and Sumatra—rely on robust Pratissoli and Interpump models for durability in muddy, high-humidity environments. Industrial hydraulic circuits powering factory machinery in Jakarta and Surabaya demand precise pressure control and high reliability, where Delta's fuel-transfer and Interpump's variable-displacement designs excel.
How to Select the Right Hydraulic Gear Pump
- Calculate your flow requirement (L/min). Measure or estimate the actuator speed and area, then divide power (kW) × 600 by pressure (bar) to get flow. 3G Electric's technical team can help size applications remotely via email or phone.
- Confirm operating pressure (bar). Check your system's relief valve setting and maximum pressure spike. Standard industrial pumps operate at 150–280 bar; higher pressures (up to 350 bar) require premium sealing and cost more.
- Choose shaft connection type. SAE flange (ISO 4401) suits electric motors; PTO (power-take-off) fits tractor and small-engine drive; spline or keyed shafts work for direct coupling. Interpump AB110 series offers PTO variants; Pratissoli KF and KS series fit both motor and engine drives.
- Verify thermal compatibility. Indonesia's tropical climate (25–40 °C ambient) requires pumps rated for high fluid temperatures. Confirm ISO VG 46 hydraulic oil compatibility and heat-dissipation capacity, especially for continuous-duty systems in Batam's petrochemical or manufacturing zones.
- Check material and sealing. Ductile iron housings resist corrosion in humid coastal areas. PTFE seals and nitrile gaskets suit tropical oils; bronze gears add cost but extend life in contaminated systems common on remote plantation sites.
3G Electric In-Stock Hydraulic Gear Pump Models
| Model | Power (kW) | Flow (L/min) | Pressure (bar) | Best Use |
|---|---|---|---|---|
| [[PRODUCT:W00151-000|Interpump PUMP W151]] | 4.04 kW | 15 L/min | 150 bar | Compact industrial and agricultural systems |
| [[PRODUCT:KF0028-000|Pratissoli PUMP KF28 R]] | Variable | 28 cm³/rev | 280 bar | High-pressure mobile hydraulics |
| [[PRODUCT:AB0110LC-000|Interpump PUMP AB110 SMOOTH L/PTO R]] | 5.5 hp+ | ~20–30 | 210 bar | Tractor PTO and engine-driven applications |
| [[PRODUCT:KS2815-100|Pratissoli PUMP KS28 1500 D1V]] | ~5.5 | 28 cm³/rev @ 1500 rpm | 280 bar | Electric-motor-driven fixed-displacement systems |
| [[PRODUCT:DEL05131|Delta Pump VM3 RL 2.4]] | Variable | 3.5 cm³/rev | 100 bar | Fuel-transfer and low-pressure hydraulic circuits |
| [[PRODUCT:ZRIDEL44-020|Interpump GEAR RED.FOR EL. MOTORS - RE44 FOR PUMP W4 R]] | 5.5 kW max | N/A (gearbox) | N/A (gearbox) | Speed reduction for electric-motor pump drives |
Why Source Hydraulic Gear Pumps from 3G Electric?
3G Electric is an authorized distributor for Pratissoli, Interpump, and Delta, with 35+ years of industrial equipment experience across Southeast Asia. We stock 8 hydraulic pump and accessory SKUs in Jakarta, with rapid delivery to Surabaya, Bandung, Batam, Medan, and remote sites. All imports include complete customs documentation, original manufacturer certificates, and English-language technical data sheets. Our in-house engineers provide free sizing consultations, pressure-test reports, and post-sale commissioning support for industrial and agricultural customers throughout Indonesia.
Frequently Asked Questions
- What is the difference between gear pumps and centrifugal pumps? Gear pumps are positive-displacement units that deliver constant flow at any pressure (until relief opens); centrifugal pumps rely on rotational speed to create pressure and lose flow as pressure rises. Gear pumps suit high-pressure hydraulic circuits; centrifugal pumps work better for low-pressure bulk transfer.
- Can I run a hydraulic gear pump at variable speed? Yes. Flow is directly proportional to rpm (Q = displacement × speed). Running at 1500 rpm instead of 1000 rpm increases flow by 50%. However, pressure remains controlled by system relief valves, not pump speed.
- Where can I buy a hydraulic gear pump in Indonesia? 3G Electric stocks Pratissoli, Interpump, and Delta models in Jakarta with same-week delivery to major cities. Request a quote via our website or call for immediate availability and pricing in IDR.
- What maintenance does a hydraulic gear pump need? Change hydraulic oil every 2000–4000 hours (6–12 months in tropical climates). Check inlet-filter pressure; clean or replace if delta-P exceeds 3 bar. Inspect case drain lines quarterly and monitor noise (worn gears = grinding sound).
Key Takeaways
- Hydraulic gear pumps deliver precise, high-pressure flow (150–350 bar) in compact designs ideal for Indonesia's industrial, agricultural, and mobile-hydraulic sectors.
- Select pumps by flow demand (L/min), operating pressure (bar), and shaft type (SAE flange, PTO, or spline). 3G Electric's technical team sizes applications free of charge.
- Pratissoli, Interpump, and Delta models are in stock and ready for immediate delivery across Jakarta, Surabaya, Batam, and regional centers with full import documentation and English support.
Ready to source your hydraulic gear pump? Contact 3G Electric today for technical specifications, competitive quotes, and delivery timelines across Indonesia. Email sales@3gelectric.id or call our Jakarta office for expert sizing and commissioning assistance.
