Structured Manufacturing Data (2026)

Hydraulic Reservoir (Tank)

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Hydraulic Reservoir (Tank) 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 Reservoir (Tank) is characterized by the integration of Tank Body/Shell and Baffle Plate. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A container that stores hydraulic fluid for a hydraulic power unit, providing fluid supply, heat dissipation, and air separation.

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Product Specifications

Technical details and manufacturing context for Hydraulic Reservoir (Tank)

Definition
The hydraulic reservoir (tank) is a critical component of a Hydraulic Power Unit (HPU) that serves as the storage vessel for hydraulic fluid. Its primary functions include: maintaining an adequate supply of fluid to the pump inlet, allowing entrained air to separate from the fluid, dissipating heat generated by the hydraulic system, and providing a space for contaminants to settle. It typically includes features such as a filler/breather cap, fluid level indicator, drain plug, and internal baffles to improve fluid conditioning.
Working Principle
The reservoir operates on the principle of fluid storage and conditioning. Hydraulic fluid returns from the system to the reservoir, where it cools as it flows over internal surfaces. Baffles slow fluid movement, allowing air bubbles to rise and escape through the breather and solid contaminants to settle. Clean, cooled fluid is then drawn from a separate compartment by the suction line to the pump, completing the fluid circuit.
Common Materials
Carbon Steel, Stainless Steel, Aluminum
Technical Parameters
  • Nominal fluid capacity, typically 2-3 times the pump's flow rate per minute to ensure adequate cooling and de-aeration. (L) Standard Spec
Components / BOM
  • Tank Body/Shell Part
    Main structural container that holds the hydraulic fluid.
    Material: Carbon Steel
  • Baffle Plate Part
    Internal plate that separates return and suction zones, promoting heat dissipation and air separation.
    Material: Steel
  • Filler/Breather Cap Part
    Allows fluid filling and permits air exchange while filtering incoming air.
    Material: Plastic or Metal with filter element
  • Sight Glass/Level Gauge Part
    Visual indicator for monitoring hydraulic fluid level.
    Material: Glass or Polycarbonate
  • Drain Plug Part
    Located at the bottom for complete fluid drainage and sludge removal.
    Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Hydraulic Reservoir (Tank).

Hydraulic Tank Oil Reservoir Fluid Reservoir industrial hydraulic fluid reservoir tank carbon steel hydraulic tank for machinery hydraulic reservoir with baffle plate and sight glass stainless steel hydraulic fluid storage tank custom aluminum hydraulic reservoir for equipment

Applied To / Applications

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

Hydraulic Power Unit (HPU)
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (gauge)
flow rate: Dependent on pump capacity, typically 10-500 L/min
temperature: -20°C to 100°C
slurry concentration: Not applicable - designed for clean hydraulic fluids only
Media Compatibility
✓ Mineral-based hydraulic oils (ISO VG 32-68) ✓ Synthetic ester fluids ✓ Water-glycol fire-resistant fluids
Unsuitable: Highly corrosive chemicals or abrasive slurries
Sizing Data Required
  • Required fluid volume (including system volume + 10-20% reserve)
  • Maximum operating temperature and ambient conditions
  • Pump flow rate and duty cycle for heat dissipation calculation

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion
Cause: Chemical attack from water contamination, acidic fluid degradation, or exposure to corrosive environments, leading to pitting, thinning, and eventual leaks or structural failure.
Contamination-induced component wear
Cause: Ingress of particulate matter (dust, metal shavings) or water into the hydraulic fluid, causing abrasive damage to pumps, valves, and seals, and promoting sludge formation that clogs filters and passages.
Maintenance Indicators
  • Visible external leaks, especially around welds, fittings, or seals, indicating potential corrosion, fatigue, or seal failure.
  • Audible knocking or gurgling sounds from the tank, suggesting air entrainment or cavitation due to low fluid levels, clogged breathers, or suction line issues.
Engineering Tips
  • Implement routine fluid analysis (e.g., particle counting, water content testing) and strict filtration (using offline or kidney-loop systems) to maintain ISO cleanliness codes and prevent contamination-driven failures.
  • Ensure proper tank design and maintenance: install and regularly inspect desiccant breathers to prevent moisture ingress, maintain correct fluid levels to avoid aeration, and use corrosion-resistant coatings or materials in corrosive environments.

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 - Reservoirs DIN 24342: Hydraulic fluid power - Reservoirs
Manufacturing Precision
  • Flatness of mounting surfaces: +/-0.1mm
  • Internal cleanliness: ISO 4406 Class 18/16/13 or cleaner
Quality Inspection
  • Pressure test: 1.5x maximum operating pressure for 30 minutes (no leaks)
  • Internal visual inspection: No contamination, burrs, or sharp edges per ISO 4413

Factories Producing Hydraulic Reservoir (Tank)

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.

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 are the benefits of using a baffle plate in a hydraulic reservoir?

Baffle plates in hydraulic reservoirs help separate air from the fluid, reduce turbulence, prevent foaming, and promote better heat dissipation, which extends fluid life and improves system efficiency.

How do I choose between carbon steel, stainless steel, and aluminum for a hydraulic tank?

Choose carbon steel for cost-effectiveness and strength in non-corrosive environments, stainless steel for corrosion resistance in harsh conditions, and aluminum for lightweight applications where weight reduction is critical.

What maintenance does a hydraulic reservoir require?

Regular maintenance includes checking fluid levels via the sight glass, cleaning or replacing the filler/breather cap to prevent contamination, inspecting for leaks, and periodically draining fluid through the drain plug to remove sediment.

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 for Machinery and Equipment Manufacturing.

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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