Industry-Verified Manufacturing Data (2026)

Hydraulic Power Unit (HPU)

Based on aggregated insights from multiple verified 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
Engineering Reasoning
70-350 bar
420 bar (burst pressure of standard SAE 100R2AT hydraulic hose)
Design Rationale: Cavitation-induced fatigue failure at vapor pressure threshold of hydraulic fluid (0.02 bar absolute for mineral oil at 40°C)
Risk Mitigation (FMEA)
Trigger Particulate contamination exceeding ISO 4406 18/16/13 cleanliness level
Mode: Servo valve spool seizure
Strategy: Install 3 μm absolute beta₃≥200 filter with differential pressure monitoring
Trigger Hydraulic fluid temperature sustained above 82°C
Mode: Seal degradation and internal leakage
Strategy: Integrate plate heat exchanger maintaining fluid at 45-55°C

Industry Taxonomies & Aliases

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

Hydraulic Power Pack Hydraulic Pump Unit industrial hydraulic power unit for machinery carbon steel hydraulic power unit HPU hydraulic pump and motor system manufacturing self-contained hydraulic pressure generator hydraulic opening system power unit

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 DNA

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)

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

S Sourcing Manager from United Arab Emirates Feb 05, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Hydraulic Power Unit (HPU) so far."
Technical Specifications Verified
P Procurement Specialist from Australia Feb 02, 2026
★★★★☆
"Testing the Hydraulic Power Unit (HPU) now; the technical reliability results are within 1% of the laboratory datasheet. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Singapore Jan 30, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Hydraulic Power Unit (HPU) from India (1h ago).

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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 Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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