Structured Manufacturing Data (2026)

Hydraulic Power Unit (HPU)

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Hydraulic Power Unit (HPU) used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Hydraulic Power Unit (HPU) is characterized by the integration of Electric Motor and Hydraulic Pump. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A self-contained system that generates and regulates hydraulic pressure to power actuators within a hydraulic opening system.

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Product Specifications

Technical details and manufacturing context for Hydraulic Power Unit (HPU)

Definition

The Hydraulic Power Unit (HPU) is the core energy source within a Hydraulic Opening System. It converts electrical or mechanical energy into hydraulic energy by pressurizing hydraulic fluid, which is then distributed to hydraulic cylinders or motors to perform the mechanical work of opening and closing doors, gates, hatches, or other mechanisms. It ensures controlled, reliable, and powerful actuation.

Working Principle

An electric motor drives a hydraulic pump, which draws hydraulic fluid from a reservoir and pressurizes it. This high-pressure fluid is directed through control valves (e.g., directional, pressure, flow) to the system's actuators. A pressure relief valve protects the system from overpressure. The fluid returns to the reservoir, often passing through a cooler and filter to maintain system health.

Common Materials

Carbon steel, Cast iron, Synthetic hydraulic fluid, Seals (NBR/FKM)

Technical Parameters

Motor power (kW) and pump flow rate (L/min) define the unit's output capacity. (kW & L/min) Customizable

Components / BOM

Electric Motor
Provides the mechanical power to drive the hydraulic pump.

Material: Cast iron, copper windings
Hydraulic Pump
Draws fluid from the reservoir and pressurizes it.

Material: Cast iron, steel gears/vanes/pistons
Hydraulic Reservoir (Tank)
Stores hydraulic fluid, allows for heat dissipation, and aids in de-aeration.

Material: Carbon steel
Pressure Relief Valve
Protects the system by limiting maximum pressure, diverting excess flow back to the tank.

Material: Steel, brass
Directional Control Valve
Directs the flow of pressurized fluid to control the motion (extend/retract) of the actuator.

Material: Steel, spool (hardened steel)
Filter
Removes contaminants from the hydraulic fluid to protect system components.

Material: Steel housing, cellulose/synthetic filter media

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hydraulic Power Unit (HPU).

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Hydraulic Opening System

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 300 bar (4350 psi)
flow rate:	5-100 L/min
temperature:	-20°C to 80°C
slurry concentration:	Not suitable for slurries; clean hydraulic fluids only

Media Compatibility

✓ Mineral-based hydraulic oil (ISO VG 32-68) ✓ Synthetic ester-based fluids ✓ Water-glycol fire-resistant fluids

Unsuitable: Abrasive slurry environments or media with solid particulates

Sizing Data Required

Required flow rate (L/min)
Maximum operating pressure (bar)
Actuator volume and cycle frequency

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Cavitation

Cause: Insufficient inlet pressure or excessive fluid temperature causing vapor bubbles to form and implode, damaging pump components.

Contamination-induced wear

Cause: Particulate ingress or degraded fluid leading to abrasive erosion of seals, valves, and cylinder surfaces.

Maintenance Indicators

Unusual knocking or whining noises from the pump indicating cavitation or bearing failure
Visible fluid leaks or oil discoloration (milky or dark) suggesting seal degradation or contamination

Engineering Tips

Implement strict fluid cleanliness protocols with regular particle counting and filtration maintenance
Maintain proper reservoir temperature and ensure adequate NPSH (Net Positive Suction Head) to prevent cavitation

Compliance & Manufacturing Standards

Reference Standards

ISO 4413: Hydraulic fluid power - General rules and safety requirements for systems and their components ANSI/B93.5M: Hydraulic fluid power - Valves - Method for measuring pressure drop/flow characteristics DIN 24340: Hydraulic fluid power - Cylinders - Bore and rod area ratios

Manufacturing Precision

Cylinder bore diameter: +/-0.02mm
Mounting surface flatness: 0.1mm per 300mm length

Quality Inspection

Hydrostatic pressure test: 1.5x maximum working pressure for 30 minutes
Particle contamination analysis: ISO 4406 cleanliness class verification

Factories Producing Hydraulic Power Unit (HPU)

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are used in this Hydraulic Power Unit construction?

This HPU features carbon steel and cast iron components, synthetic hydraulic fluid, and NBR/FKM seals for durability and leak prevention in industrial environments.

What are the main components included in this HPU system?

The system includes a directional control valve, electric motor, filter, hydraulic pump, hydraulic reservoir (tank), and pressure relief valve for complete hydraulic power generation and regulation.

What applications is this Hydraulic Power Unit designed for?

This HPU is engineered for machinery and equipment manufacturing applications, specifically powering actuators within hydraulic opening systems where reliable pressure control is essential.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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