What Are Bladder Accumulators?
Hydraulic bladder accumulators are pressure vessels used to store hydraulic energy, stabilize system pressure, and protect hydraulic circuits from shocks and pulsations. At Techknow Engineering, we supply bladder type accumulators designed for reliable performance in industrial and mobile hydraulic systems.
A bladder type hydraulic accumulator uses a gas-charged elastomer bladder to separate nitrogen gas from hydraulic fluid. This design allows the accumulator to respond instantly to pressure changes, ensuring smooth operation, reduced component stress, and improved system efficiency.
Our bladder accumulators are built using high-tensile steel shells and durable bladder materials, making them suitable for high-pressure and continuous-duty applications. Multiple sizes, pressure ratings, and international certifications (CE, ASME, PED) are available to meet project and compliance requirements.
As an experienced bladder type accumulators supplier in India, Techknow Engineering supports customers with technical selection guidance, application expertise, and dependable after-sales support.
Working Principle of Bladder Type Hydraulic Accumulator
In a bladder type hydraulic accumulator, an elastomer bladder is pre-charged with inert nitrogen gas. When hydraulic fluid enters the accumulator, the gas compresses and stores energy. When system pressure drops, the compressed gas expands and forces the stored fluid back into the circuit, delivering instant power.
Proper design ensures a minimum oil cushion at the base of the bladder, preventing mechanical damage and ensuring long service life. This working principle makes hydraulic bladder accumulators ideal for applications requiring fast response and high flow rates.
Bladder Type Accumulators – Variants & Compatibility
Bladder type accumulators are widely used across industries due to their reliability and quick discharge capability. Techknow Engineering supplies and supports compatible models including:
- Olaer bladder accumulators
- EPE bladder accumulators
- HYDAC bladder accumulators
- Bosch Rexroth bladder accumulators
- NXQ bladder accumulators
As a bladder type hydraulic accumulator distributor, dealer and seller, we ensure product compatibility with existing hydraulic systems and operating conditions.
Typical Specifications of Bladder Accumulators
- Pressure range: 20 — 1000 bar
- Nominal volume: 0.63 — 600 litres
- Flow rate: up to 100 l/s (≈ 6000 lpm) depending on model
- Temperature range: -40 °C to +100 °C (seal dependent)
- Shell materials: Carbon steel, SS 316L, specialty alloys
- Elastomers: NBR (Perbunan), IIR (Butyl), ECO, FKM (Viton)
- Connections: Threaded, SAE/ANSI/ISO flanges; custom ports available
- Coatings & finishes: Ni-plating, epoxy/anti-corrosion coatings
- Certifications: CE / PED, ASME VIII Div 1, U-Stamp, ABS (as applicable)
Key Features & Benefits of Bladder Accumulators
- Fast discharge with immediate response
- Compact design with high flow capability
- Low maintenance and long service life
- Suitable for hydro-pneumatic and energy recovery systems
- Repairable designs and spare-bladder options
- Available with position sensing for piston-based systems where needed
Typical Applications of Bladder Accumulators
- Energy storage for intermittent-operation systems
- Emergency reserve for hydraulic circuits
- Leakage compensation and volume make-up
- Shock and vibration absorption in presses, turbines, and mobile equipment
Service, Spares & Support
We supply Accumulators charging kits , spare bladders, valves, mounting hardware and full commissioning services. On-site testing and maintenance contracts available. Contact our engineering team for compatibility checks and retrofit suggestions.
We also provide below-mentioned types of Accumulators and related accessories designed to ensure safe operation, proper mounting, and effective handling of the Accumulators.
FAQ
A bladder accumulator is a hydraulic energy storage device consisting of a seamless cylindrical steel shell with a rubber bladder inside that acts as a gas-proof barrier. The bladder separates the gas and fluid sections and is pre-charged with inert gas at a specified pressure. When system pressure drops, the gas expands and forces the stored fluid back into the hydraulic circuit, releasing immediate energy.
- Pressure range: 20 to 1000 bar
- Nominal volume: 0.63 to 600 liters
- Flow rate: up to 100 l/s (3000 lpm)
- Temperature range: -40°C to +100°C
- Shell materials: Carbon steel, SS 316L, or carbon steel with internal Ni-plating
- Bladder materials: Perbunan (NBR), Butyl (IIR), Ethylene oxide (ECO), Viton (FPM)
- Energy storage for intermittent operating systems
- Emergency energy reserves
- Compensation for leakage losses
- Shock and vibration absorption
- Volume compensation due to pressure or temperature changes
- Hydro-pneumatic applications requiring pulsation damping
- Fast discharge capability
- Instantaneous response
- No pressure differential between gas and fluid
- Compact design with minimal maintenance
- Wide temperature adaptability
- Suitable for low to high pressure applications
- Fully repairable design
Our accumulators are designed to maintain a minimum 10% oil volume between the bladder bottom and oil valve top, preventing bladder damage during gas expansion. Transfer Barrier versions are also available, compatible with backup N2 bottles for improved safety and reliability.
Yes. Techknow Engineering Enterprise provides complete support, including spare parts, servicing, and system integration. Our experienced team ensures your accumulator operates at peak performance and meets safety standards.
Absolutely. We provide custom options such as special coatings (primer, Ni plating, rubber lining, offshore coats, plastic coatings), various connection types, and manifold block configurations with flanged fluid ports to suit your exact application needs.
Contact our technical team at Techknow Engineering Enterprise for expert consultation. We’ll assess your pressure, flow rate, temperature range, and application requirements to recommend the most suitable bladder accumulator solution.
We supply bladder accumulators from trusted manufacturers including HYDAC, Olaer, Parker Hannifin, Bosch Rexroth, EPE, Fox, Buccma, NXQ, and Hawe. These brands are renowned for durability, reliability, and long service life.
Certified designs • Custom engineering • On-site commissioning • Fast delivery across India