Reservoir Tank for Pump Assemblies | Specifications & Selection

Product Specifications

Technical details and manufacturing context for Reservoir Tank

Definition

The reservoir tank is a critical component of reservoir/pump assemblies that serves as a storage vessel for hydraulic fluid, coolant, lubricant, or other process fluids. It maintains fluid volume and pressure stability, provides surge capacity during pump operation, allows for fluid cooling and de-aeration, and facilitates maintenance access for fluid changes and system inspection. The tank is typically constructed from stainless steel, carbon steel, or polyethylene, with material grades such as 304 or 316L per ASTM A240, depending on the fluid compatibility and application requirements. Nominal capacity ranges from 10 to 1000 liters, with a tolerance of ±5% to ensure consistent fluid supply. Operating pressure is specified between 1.0 and 1.6 MPa, and operating temperature ranges from -40°C to 85°C. Wall thickness varies from 3 to 12 mm, and surface roughness is typically 0.8 to 3.2 μm Ra per ISO 4287. Leakage rate at rated pressure is ≤0.1 mL/min, indicating seal integrity. Inlet/outlet diameters range from 25 to 200 mm per ISO 7005, and weight ranges from 15 to 500 kg, affecting installation and support structure. These parameters are reference ranges; actual values must be confirmed with the legal manufacturer or supplier for the specific model and application. The tank operates by providing a contained volume where fluid is stored at atmospheric or slightly pressurized conditions, with internal baffles to separate air, settle contaminants, and maintain temperature stability.

Working Principle

The reservoir tank operates by providing a contained volume where fluid is stored at atmospheric or slightly pressurized conditions. Fluid enters from return lines and exits through suction lines to the pump. Baffles or internal structures may be incorporated to separate air from fluid, promote settling of contaminants, and maintain consistent fluid temperature through natural or forced convection. The tank ensures a stable supply of fluid to the pump, accommodating volume changes due to system demand and thermal expansion. Proper sizing and selection of the tank are based on pump flow rate and required reserve time, with nominal capacity and tolerance ensuring consistent fluid supply. Operating pressure and temperature limits must be respected to avoid seal and gasket failure. Verification of material grade, wall thickness, surface roughness, and leakage rate is essential for system integrity. Maintenance signals include increased leakage, pressure drops, or fluid contamination, indicating seal wear or internal damage. Failure boundaries are defined by exceeding pressure, temperature, or capacity limits, which can lead to structural failure or pump cavitation.

Common Materials

Stainless Steel, Carbon Steel, Polyethylene

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Capacity	10–1000 L	Select based on pump flow rate and required reserve time.
Operating Temperature	-40–85 °C	Outside this range, seals and gaskets may fail.
Material Grade	304/316L	316L for corrosive fluids; 304 for general use.ASTM A240
Wall Thickness	3–12 mm	Thicker for high pressure or large diameter.
Surface Roughness	0.8–3.2 μm Ra	Lower for sanitary or high-purity applications.ISO 4287
Leakage Rate	≤0.1 mL/min	At rated pressure; higher leakage indicates seal failure.
Weight	15–500 kg	Affects installation and support structure.
Inlet/Outlet Diameter	25–200 mm	Match pump and piping connections.ISO 7005
Tolerance on Capacity	±5 %	Ensures consistent fluid supply.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Tank Body
The tank shell itself: holds the contents and carries the static and operating loads.
Filler Cap Part
Provides access for fluid filling and maintenance, often includes breather function

Material: Plastic or Metal
Sight Glass
Visual indicator for monitoring fluid level without opening the reservoir

Material: Tempered Glass or Polycarbonate
Baffle Plate Part
Internal divider that separates return and suction flows, reduces turbulence and promotes de-aeration

Material: Same as tank material
Drain Plug Part
Allows complete drainage of fluid for maintenance or fluid changes

Material: Steel or Brass

Applied To / Applications

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

Reservoir / Pump Assembly

View system integration details

Material Reservoir/Supply Line

View system integration details

Manufacturers of Reservoir Tank

Manufacturer profiles associated with Reservoir Tank.

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Frequently Asked Questions

What materials are available for reservoir tanks?

According to the directory, reservoir tanks can be made from stainless steel, carbon steel, or polyethylene. For stainless steel, material grades 304 or 316L are listed per ASTM A240, with 316L recommended for corrosive fluids and 304 for general use. The choice depends on the fluid type and application requirements.

How do I select the correct reservoir tank capacity?

Nominal capacity ranges from 10 to 1000 liters, with a tolerance of ±5%. Selection should be based on the pump flow rate and required reserve time. Ensure the tank provides sufficient surge capacity to accommodate system demand and thermal expansion. Always verify the exact capacity needed for your specific system with the manufacturer.

What are the operating pressure and temperature limits?

The operating temperature range is -40°C to 85°C. Exceeding these limits can cause seal and gasket failure. It is crucial to confirm that the tank's ratings match your system's conditions before installation.

How is leakage rate specified and what does it indicate?

The leakage rate at rated pressure is ≤0.1 mL/min. A higher leakage rate indicates seal failure or internal damage. Regular testing and maintenance are recommended to ensure the tank's integrity and prevent fluid loss.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 2 bar (gauge)
flow rate:	Up to 100 L/min
temperature:	-20°C to 80°C
slurry concentration:	Up to 10% solids by weight

Reservoir Tank

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards