Gear oil pump QX Series QX83-250R308

Product Description

Hengmeisi Gear oil pump QX Series QX83-250R308, direct factory replacement for BUCHER, offers 330 bar continuous / 400 bar peak pressure, 97% volumetric efficiency, and low pulsation for precise heavy-load hydraulic systems.

Product Advantages

1. Internal Meshing Structure vs External Gear & Vane Pump Designs

Unlike traditional external gear pumps or vane pumps with big pulsation and friction loss, Internal Gear Pump QX83-250R308 adopts mature internal tooth meshing layout. It avoids gear side clearance abrasion and flow fluctuation drawbacks, realizing higher pressure resistance and stable running performance.

2. Precise Flow Output & Compact Body Layout

QX83-250R308 features fixed 250cc/rev displacement with compact integrated housing structure. Optimized tooth profile ensures stable oil delivery without extra auxiliary valve, easy for compact hydraulic station installation and space-limited equipment matching.

3. Premium Materials for Extended Durability

Gear & drive shaft: high-strength alloy steel via carburizing quenching & precision grinding for outstanding wear resistance;Seals: standard HNBR rubber matching code 308, steadily applicable from -20℃ to +90℃ to prevent leakage under high pressure;Bearings: precision roller bearings sustain max 1800rpm long-term continuous running.

4. Built-in Anti-Contamination Adaptability

QX83-250R308’s internal meshing structure owns stronger hydraulic oil impurity tolerance than conventional pumps. It is less sensitive to tiny contaminants inside oil fluid, cutting stuck breakdown risk and lengthening service life under poor on-site oil conditions.

Model Code

QX83-250R308 follows standard BUCHER coding specification, with intuitive parameter rules enabling buyers quick parameter confirmation without advanced hydraulic expertise:QX83: Core large-displacement QX83 series, differentiated from small QX41/QX51 serial gear pumps;250: Fixed nominal displacement of 250cm³ per revolution, designed for large-flow high-pressure hydraulic demands;R: Right-hand drive rotation, standard shaft direction matching most mainstream host equipment;308: Custom configuration including HNBR sealing kit, exclusive oil port layout and dedicated mounting flange size.

As flagship model of QX83 series, QX83-250R308 is customized for high-pressure large-flow working scenarios, widely sourced by global purchasers for metallurgy, shipbuilding and heavy machinery hydraulic units.

Product Structure

Core Architecture: Internal Meshing Gear Structure

1.Different from external gear & vane pump construction, QX83-250R308 consists of inner gear, outer ring gear, drive shaft, integrated cast pump housing and fixed end cap for compact overall dimension.

2.Fixed-Displacement Constant-Flow Mechanism

With fixed 250cc/rev tooth profile design, QX83-250R308 outputs steady fixed flow under rated rotating speed, needing no variable control component to simplify peripheral hydraulic circuit layout.

3.Upgraded Component Raw Material

Gear assembly: carburized alloy steel for high hardness and wear resistance;

Sealing set: 308-spec HNBR composite seal with wide temperature & high-pressure leak-proof property;

Pump casing: high-rigidity cast iron housing to resist vibration under long-duration high-load operation.

4.Standard Pre-Assembled Sealing & Oil Port

QX83-250R308 is pre-equipped with factory-standard seals and standardized inlet/outlet ports to simplify field piping and daily component replacement maintenance.

Application Scenarios

Metallurgical equipment: high-pressure rolling mill hydraulic stations & continuous casting machine oil supply;

Marine hydraulic system: deck machinery and ship auxiliary hydraulic power packs;

Heavy industrial machinery: large hydraulic forging presses & heavy-duty hydraulic test benches;

Stationary hydraulic unit: compact high-flow power pack for rubber & plastic processing machines;

Custom heavy-load equipment: high-temperature industrial hydraulic systems for special engineering fields.