Bladder Accumulator

I. Product Introduction

The pneumatic bladder accumulator is a specialized pressure-bearing component for energy storage in hydraulic and pneumatic systems. It relies on an internal rubber bladder to separate nitrogen from the hydraulic medium, achieving system energy storage, pressure compensation, buffering and unloading, pressure stabilization and noise reduction. It is suitable for various industrial hydraulic and pneumatic complete equipment. The product bladder is made of special rubber material, featuring oil resistance, acid and alkali resistance, bending resistance, stable structural strength, and stable service life. The product complies with HG/233192 domestic standards and ASME international standards, suitable for various domestic and international hydraulic unit assembly applications.

Operating principle: Nitrogen is pre-charged into the accumulator bladder. When pipeline oil pressure rises, the hydraulic medium squeezes the bladder to compress nitrogen, converting hydraulic energy into pneumatic potential energy for storage. When pipeline oil pressure drops or load fluctuates, nitrogen expands to release potential energy, reversely pushing the medium to supplement pressure, balancing the entire hydraulic system pressure, absorbing instantaneous pipeline pressure impacts, and ensuring stable equipment operation.

II. Basic Model Parameters

1. Model Specifications

(1) Bladder capacity: 0.4~100L

(2) Bladder length: 74~1880mm

(3) Structure length: Type A, Type AB

2. Technical Parameters

Nominal pressure: 31.5MPa

Applicable media: Mineral oil, water-glycol, emulsion

Media temperature: -15°C to +65°C

3. Matching Valve Parameters

Matching charging valve: QXF type charging valve, nominal diameter 4mm, 5mm, available in domestic and ASME versions

Matching shut-off valve: XJF type accumulator shut-off valve, nominal diameter 10/20/32mm, discharge port diameter 1mm

Matching safety valve: AQF type safety ball valve, combining safety, shut-off, and unloading protection functions

III. Core Product Features

1. Excellent material performance: Built-in integrated vulcanized rubber bladder, resistant to medium corrosion, reciprocating compression and bending, uniform pressure deformation, suitable for long-term high-low pressure alternating conditions;

2. Flexible installation: Supports vertical, horizontal, and inclined installation, adaptable to various workshop pipeline layouts, strong installation adaptability;

3. Fast pressure response: Bladder-type energy storage structure, fast air pressure rebound, can quickly absorb pipeline water hammer pressure, reduce oil pressure fluctuation amplitude;

4. Complete specifications: Capacity covering 0.4L-100L, with Type A and Type AB dual structures, compatible with conventional hydraulic complete equipment on the market;

5. Standardized compliant production: Dual standard production and testing, suitable for domestic project construction acceptance and foreign trade equipment factory verification;

6. Complete accessories: Can be paired with our factory charging valves, shut-off valves, safety ball valves, fixed clamps full set of accessories, one-stop assembly.

IV. Comprehensive Product Advantages

1. Good pressure stabilization and buffering effect: Can alleviate frequent hydraulic pump start-stop, balance pipeline working pressure, reduce equipment oil pressure failures, extend hydraulic component service life;

2. Convenient installation and maintenance: Small volume models can be directly installed on pipelines, large volume models can be fixed with specialized clamps, simple disassembly and maintenance process;

3. Wide media compatibility: Compatible with hydraulic oil, flame-retardant water-glycol, emulsion multiple transmission media, suitable for multi-industry special hydraulic conditions;

4. Controllable maintenance cost: Bladder is an independent consumable part, can be replaced separately after damage, no need to replace accumulator shell, reducing later consumable expenditure;

5. Diverse working conditions: Wide temperature range operation capability, stable use in high and low temperature workshops, suitable for vibration, enclosed, corrosion multiple site conditions;

6. High localization adaptability: Full set of valves and bladders can be locally sourced, can replace imported same-specification accumulators, reducing parts procurement cycle.

V. Application Scenarios

1. Industrial machine tool field: CNC machine tools, hydraulic stamping, injection molding equipment hydraulic stations, pipeline pressure stabilization, pressure impact absorption, intermittent pressure supplementation;

2. Fire protection water supply field: Fire protection pressure stabilization pump room energy storage system, emergency water storage and pressure supplementation, ensuring fire pipeline water pressure stable and compliant;

3. Construction machinery field: Engineering vehicles, vehicle-mounted hydraulic units, buffering driving vibration oil pressure fluctuation, auxiliary power energy storage;

4. Chemical fluid field: Chemical hydraulic transmission units, suitable for flame-retardant media, weak corrosion conditions, system energy storage and pressure stabilization;

5. Ship and maritime field: Marine hydraulic control systems, suitable for ship cabin alternating temperature, humid environment, balancing oil circuit pressure;

6. Automation complete equipment field: Assembly line hydraulic tooling, clamping units, short-term oil supply energy storage, reducing hydraulic installed power.

VI. Usage FAQ

Q1: What is the difference between Type A and Type AB accumulators?

A: The two have different structural lengths. Type A is suitable for vertical conventional installation, and Type AB is suitable for horizontal and strong vibration condition installation.

Q2: Can the accumulator be charged with other gases?

A: Only nitrogen can be charged into the bladder. Oxygen, flammable, and corrosive gases must not be used to ensure shell and bladder safety.

Q3: What volume accumulators require clamp fixing?

A: Below 1L can be directly installed on pipeline. For vibration conditions or volumes above 1L, specialized clamps are recommended.

Q4: How to complete nitrogen charging for high-pressure accumulators?

A: For conventional pressure, use CQ type charging tool. When gas source pressure is insufficient, use CDZ type nitrogen booster equipment for pressurized charging.

Q5: Can the accumulator shell be drilled or welded for modification?

A: Welding and mechanical processing must not be performed on the accumulator shell, as it will damage the pressure-bearing structure and cause safety hazards.

VII. Installation and Use Specifications

(1) Installation Position

The pneumatic bladder accumulator can be installed vertically, horizontally, or at an angle. When selecting angled or vertical installation, the oil valve must be placed at the bottom.

(2) Fixing Method

For accumulators with capacity below 1L, they can be directly installed on the pipeline. For conditions with strong vibration or capacity above 1L, it is recommended to use our factory clamps or complete accumulator fixing components.

(3) Nitrogen Charging Requirements

Before putting the accumulator into service, nitrogen must be charged into the bladder. Nitrogen charging can be performed using charging tools. We recommend using our factory CQ type charging tool. If the gas source nitrogen pressure cannot meet high-pressure accumulator requirements, we recommend using our factory CDZ type nitrogen booster charging vehicle for pressurized charging.

(4) General Usage Precautions

1. Welding and any mechanical processing must not be performed on the accumulator shell;

2. Only nitrogen can be charged into the accumulator bladder. Oxygen and other flammable and corrosive gases must not be used;

3. The accumulator must be connected to a hydraulic system equipped with a relief valve or safety valve for use.