Accumulator Unit

Product Specifications

Technical details and manufacturing context for Accumulator Unit

Definition

An accumulator unit is a self-contained module within an accumulator bank system designed to store energy in the form of pressurized fluid (hydraulic or pneumatic). It functions as a key energy storage element, absorbing excess system pressure during low-demand periods and releasing stored energy to supplement pump flow during peak demand, thereby stabilizing system pressure, dampening pulsations, and providing emergency power backup. The unit typically consists of a pressure vessel, a gas charging valve, a fluid port, and an internal separating element such as a piston, bladder, or diaphragm. The vessel is made of high-strength steel, while the separating element is often synthetic rubber. Seals are typically NBR or FKM. The unit is available in nominal volumes from 10 to 100 liters, with operating pressures from 1.0 to 1.6 MPa and maximum pressures from 2.5 to 4.0 MPa. Operating temperature ranges from -20°C to 80°C, and leakage rate is limited to ≤0.1 mL/min. Pressure drop is ≤0.05 MPa, and response time is ≤0.2 seconds. The material of construction is 316L stainless steel. Weight ranges from 15 to 60 kg, and dimensions vary from 300×200×400 mm to 600×400×800 mm. Connection sizes are DN15 to DN50, and IP ratings are IP54 to IP65. These values are reference ranges; verify model-specific data with the manufacturer. The unit is selected based on required energy storage, system pressure, and flow demands. It is installed in hydraulic or pneumatic systems to improve efficiency and reliability. Regular maintenance includes checking gas pre-charge, inspecting seals, and monitoring leakage. Failure signs include excessive leakage, pressure drop, or slow response. Always consult the legal manufacturer or supplier for exact specifications and compliance with applicable standards.

Working Principle

The accumulator unit operates by compressing a gas (typically nitrogen) within a sealed chamber separated from the system fluid by a piston, bladder, or diaphragm. During system operation, when fluid pressure exceeds a set point, fluid enters the unit, compressing the gas and storing energy. When system pressure drops below the gas pressure, the compressed gas expands, forcing the stored fluid back into the system to maintain pressure and flow. This cycle allows the unit to absorb pulsations, compensate for leakage, and provide auxiliary flow during peak demand. The gas pre-charge pressure must be set correctly to ensure proper operation. The unit's response time is critical for dynamic applications, and the pressure drop across the unit affects efficiency. The separating element prevents gas from dissolving into the fluid, maintaining the gas charge over time. The unit's design ensures safe operation within specified pressure and temperature limits.

Common Materials

High-strength steel, Synthetic rubber (bladder/diaphragm), Seals (NBR/FKM)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Volume	10–100 L	Select based on required energy storage.GB/T 2352
Maximum Pressure	2.5–4.0 MPa	Do not exceed for safety.
Operating Temperature	-20–80 °C	Seals degrade above 80°C.
Leakage Rate	≤0.1 mL/min	Exceeds limit indicates seal failure.
Pressure Drop	≤0.05 MPa	Higher drop reduces efficiency.
Response Time	≤0.2 s	Critical for dynamic applications.
Material	316L	Corrosion resistance for hydraulic fluids.ASTM A240
Weight	15–60 kg	Affects installation and support.
Dimensions (L×W×H)	300×200×400–600×400×800 mm	Check space constraints.
Connection Size	DN15–DN50 mm	Match system piping.
IP Rating	IP54–IP65	Higher rating for dusty/wet environments.IEC 60529

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

Pressure Vessel
Contains the pressurized fluid and gas, providing structural integrity.

Material: High-strength steel
Bladder/Diaphragm Part
Separates the gas chamber from the fluid chamber, preventing mixing.

Material: Synthetic rubber (NBR, HNBR, FKM)
Gas Valve
Allows for charging, monitoring, and adjusting the pre-charge gas pressure.

Material: Brass or stainless steel
Fluid Port Part
Connects the accumulator unit to the hydraulic or pneumatic system.

Material: Steel with sealing surfaces
Piston Optional
One of the named separating elements that divides the gas chamber from the system fluid.
Nitrogen
The pre-charge gas that is compressed inside the sealed chamber to store energy.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Accumulator Unit.

Applied To / Applications

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

Accumulator Bank

View system integration details

Manufacturers of Accumulator Unit

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Dongying Lake Petroleum Technology CO., Ltd

Shandong, CN

ISO GOST

Also makes: Desanders/Desilters, Hydraulic Power Unit, Pulsation Dampener and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the function of an accumulator unit?

An accumulator unit stores hydraulic or pneumatic energy in the form of pressurized fluid. It absorbs excess pressure during low demand and releases stored energy during peak demand, stabilizing system pressure and providing backup power.

What are the typical specifications for an accumulator unit?

Typical reference ranges include nominal volume 10-100 L, operating pressure 1.0-1.6 MPa, maximum pressure 2.5-4.0 MPa, operating temperature -20 to 80°C, and leakage rate ≤0.1 mL/min. Always verify with the manufacturer for the specific model.

How do I select the right accumulator unit?

Selection is based on required energy storage, system pressure, flow demands, and space constraints. Consider the nominal volume, pressure ratings, connection size, and response time. Consult the manufacturer for application-specific guidance.

What maintenance does an accumulator unit require?

Regular maintenance includes checking gas pre-charge, inspecting seals for wear, and monitoring leakage rate. If leakage exceeds 0.1 mL/min or pressure drop is above 0.05 MPa, seals may need replacement. Always follow manufacturer guidelines.

Data Basis

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

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.

Buyer enquiry

Request manufacturing insight for Accumulator Unit

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Up to 350 bar (5000 psi)
flow rate:	Up to 300 L/min
temperature:	-20°C to +80°C
slurry concentration:	Not recommended for slurries above 5% solids by volume

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards