Structured Manufacturing Data (2026)

Reservoir

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Reservoir used in the Motor Vehicle Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Reservoir is characterized by the integration of Reservoir Cap and Fluid Level Sensor. In industrial production environments, manufacturers listed on CNFX commonly emphasize Polypropylene construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A container that stores brake fluid for the brake master cylinder system.

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Product Specifications

Technical details and manufacturing context for Reservoir

Definition
The reservoir is a critical component of the brake master cylinder assembly that holds and supplies brake fluid to the hydraulic braking system. It maintains the proper fluid level to ensure consistent brake pressure and compensates for fluid displacement during brake pad wear and temperature changes.
Working Principle
The reservoir stores brake fluid under atmospheric pressure and supplies it to the master cylinder chambers through ports. As brake fluid is consumed during braking or leaks occur, the reservoir replenishes the system. It typically has separate compartments for the primary and secondary circuits in dual-circuit braking systems.
Common Materials
Polypropylene, Nylon, Polyethylene
Technical Parameters
  • Fluid capacity of the reservoir (ml) Per Request
Components / BOM
  • Reservoir Cap Part
    Seals the reservoir opening to prevent contamination and fluid evaporation
    Material: Plastic with rubber seal
  • Fluid Level Sensor
    Monitors brake fluid level and triggers warning light when low
    Material: Plastic with electrical contacts
  • Mounting Bracket Part
    Secures the reservoir to the master cylinder or vehicle body
    Material: Steel or plastic

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Reservoir.

brake fluid reservoir for master cylinder polypropylene brake fluid container automotive brake reservoir with sensor nylon brake fluid reservoir bracket motor vehicle brake system reservoir

Applied To / Applications

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

Brake Master Cylinder
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar
other spec: Fluid volume capacity: 0.1-2.0 L, Material: Polypropylene or Nylon
temperature: -40°C to 120°C
Media Compatibility
✓ DOT 3/4/5.1 brake fluid ✓ Glycol-based hydraulic fluids ✓ Mineral oil
Unsuitable: Chlorinated solvents or strong acids
Sizing Data Required
  • Required fluid volume (L)
  • Master cylinder bore size (mm)
  • Vehicle/system mounting constraints

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and pitting
Cause: Chemical attack from stored fluids, atmospheric exposure, or galvanic corrosion due to incompatible materials, leading to wall thinning and eventual leaks.
Structural fatigue cracking
Cause: Cyclic loading from pressure variations, thermal expansion/contraction, or vibration from connected equipment, resulting in crack initiation and propagation.
Maintenance Indicators
  • Visible weeping, staining, or active leaks at seams, welds, or connections
  • Abnormal audible hissing or dripping sounds indicating pressure loss or internal flow issues
Engineering Tips
  • Implement routine ultrasonic thickness testing and corrosion mapping to monitor wall integrity and schedule proactive repairs before failure occurs.
  • Install and maintain proper pressure relief devices and overfill protection systems to prevent over-pressurization and stress beyond design limits.

Compliance & Manufacturing Standards

Reference Standards
ISO 11439:2013 (Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles) ASTM A240/A240M (Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications) ASME Boiler and Pressure Vessel Code, Section VIII (Rules for Construction of Pressure Vessels)
Manufacturing Precision
  • Wall Thickness: +/-5% of nominal thickness
  • Cylindricality: 0.5% of diameter
Quality Inspection
  • Hydrostatic Pressure Test (to verify structural integrity and leak tightness)
  • Ultrasonic Testing (UT) for wall thickness measurement and defect detection

Factories Producing Reservoir

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 materials are used in manufacturing this brake fluid reservoir?

This reservoir is constructed from durable materials including polypropylene, nylon, and polyethylene, ensuring chemical resistance and long-term reliability in automotive brake systems.

What components are included in the brake fluid reservoir BOM?

The bill of materials includes a fluid level sensor for monitoring brake fluid levels, a mounting bracket for secure installation, and a reservoir cap to prevent contamination and evaporation.

How does this reservoir integrate with the brake master cylinder system?

This reservoir stores and supplies brake fluid to the master cylinder, maintaining proper hydraulic pressure for responsive braking. The fluid level sensor alerts drivers when fluid needs replenishment.

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 Motor Vehicle 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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