Hystat Systems is a leading UK manufacturer and supplier of high-specification bladder accumulators designed for critical fluid power storage, shock absorption, and pulsation dampening. Operating from our dedicated 50,000 sq ft production facility in West Yorkshire, we specialise in supplying robust, heavy-duty accumulators built to withstand the world’s most arduous industrial, offshore, and marine environments.
Whether you require standard low-pressure configurations or bespoke high-pressure installations, our expert design engineers utilise advanced material science to deliver maximum performance where off-the-shelf components fail. From standalone units to complete multi-bottle backup skids, Hystat systems provide reliable energy management for high-stakes applications worldwide.
To combat aggressive environmental conditions and fluid incompatibility, Hystat offers an extensive range of metallic shell materials and specialised elastomeric compounds. Our shells can be manufactured or coated to endure severe marine and subsea environments, utilising high-grade carbon steels, stainless steels, and protective finishings.
We match this with a diverse selection of bladder elastomers—including Nitrile (NBR), Hydrogenated Nitrile (HNBR), Viton (FPM), and low-temperature compounds—to guarantee chemical compatibility with standard mineral oils, water glycols, and synthetic processing fluids across extreme temperature envelopes.
Every bladder accumulator we supply is fully certified to meet strict international safety and pressure equipment regulations. We offer full material traceability and design validation in compliance with PED 2014/68/EU, ASME VIII, PD5500, and EN14359, alongside third-party design witnessing through major marine authorities including DNV, LRQA, Lloyds Marine, BV and ABS.
| Volume Range | from 1 Litres to 57 Litres (Larger volumes available i.e. 200L) |
| Pressure Range | 1 to 1500 Bar (Standard Ranges of 420 and 690 bar) |
| Temperature Range | -50°C to over 100°C (-58°F to +212°F) |
| Typical Metallics | Chromium Molybdenum Shells |
| Typical Elastomers | NBR, HNBR, EPDM, VITON, BUTYL |
| Design Codes | BSEN 14359:2017 & ASME VIII Division 1 |
| Approvals | PED 2014/68/EU (CE), ASME U Stamp, DNV, ABS, LRQA, ABS, Australian, Canadian CRN, BV, NR13, ATEX 2014/34/EU, National Board |
| Gas Connections | Standard Range or modified as per customer specification |
| Fluid Connection | Standard Range or modified as per customer specification |
| External Coatings | Marine, Offshore, Subsea, Industrial etc |
| Volume Range | 1 Litres to 57 Litres |
| Pressure Range | 1 to 1500 Bar |
| Temperature Range | -50°C to over 100°C (-58°F to +212°F) |
| Typical Metallics | Various Carbon Steels, 316SS, Duplex, Super Duplex, 17/4, Inconel, Hastelloy |
| Typical Elastomers | NBR, HNBR, EPDM, VITON, BUTYL |
| Design Codes | BSEN 14359:2017, ASME VIII Division 1, PD5500, EN13445, AS1210 |
| Approvals | PED 2014/68/EU (CE), ASME U Stamp, DNV, ABS, LRQA, ABS, Australian, Canadian CRN, BV, NR13, ATEX 2014/34/EU, National Board |
| Gas Connections | Standard Range or modified as per customer specification |
| Fluid Connection | Standard Range or modified as per customer specification |
| External Coatings | Marine, Offshore, Subsea, Industrial etc |
Along with our standard bladder accumulator range, Hystat also manufacture bespoke bladder accumulators that are made to order, allowing precision customisation of fluid port configurations, mounting orientations, and high-frequency charging options. By pairing advanced gas-containment technology with robust shell designs, we manufacture highly responsive energy storage systems that excel in rapid-cycling environments.
Volumetric Capacity: Ranging from compact 0.1 Litre to 57 Litre. Larger capacities available on request.
Operating Pressure Ratings: Standard and custom options manufactured to handle pressures from 5 bar up to 690 bar and beyond.
Thermal Tolerance: Specialised low- and high-temperature elastomeric compounds engineered for environments spanning -40°C to +150°C.
Fluid Connection Ports: Standardised BSP, NPT, SAE, and bespoke flanged connections tailored to integrate seamlessly with your existing hydraulic pipework.
Surface Protection: Multi-coat epoxy paint systems, offshore-grade marine coatings, or optional stainless steel shells for maximum subsea longevity.
When you choose Hystat for your fluid power infrastructure, you are partnering with a specialist UK manufacturer backed by half a century of heavy engineering expertise. We do not just supply products; we engineer long-term operational reliability for high-stakes industrial, marine, and offshore applications.
British Design & Manufacture: Every single bladder accumulator is designed, machined, and rigorously pressure-tested at our dedicated 50,000 sq ft production facility in West Yorkshire.
Bespoke Drop-In Replacements: Our design engineering team can reverse-engineer or adapt shell dimensions and porting positions to create an exact structural match for legacy or obsolete competitor accumulators.
Uncompromising Quality Assurance: We provide complete manufacturing data books as standard, delivering 100% material traceability and compliance with global standards, including PED 2014/68/EU and ASME VIII.
Responsive Technical Consultation: You gain direct access to our experienced fluid power engineers from initial concept layout through to final third-party witnessing and dispatch.
Bladder accumulators excel in high-frequency, rapid-cycling hydraulic systems. They are primarily utilised for emergency energy storage to maintain system pressure during a pump failure, pulsation dampening to absorb destructive fluid shocks from fast-acting valves, and thermal expansion compensation in closed-loop circuits.
Material selection depends entirely on your operating fluid and temperature parameters. Standard Nitrile (NBR) is ideal for general mineral oil applications, while Hydrogenated Nitrile (HNBR) or Viton (FPM) are selected for higher temperatures or aggressive synthetic fluids. Our engineering team will specify the exact elastomeric compound required based on your chemical and thermal envelope.
Yes. Because we offer full custom engineering capabilities, we can reverse-engineer or adapt mounting brackets, port configurations, and overall shell dimensions to match the exact physical footprint of a legacy unit, allowing for a seamless replacement without piping modifications.
We facilitate full production and design approvals as required by your sector. This includes:
Looking for a reliable, heavy-duty bladder accumulator solution or a custom-engineered replacement? Contact our West Yorkshire engineering team today to discuss your pressure, volume, and material requirements.
Design, Manufacturing, Repair & Maintenance of:
Hydraulic Cylinders
Accumulators
Rotary Actuators
Rotary Distributors
Design, Manufacturing, Repair & Maintenance of Hydraulic Cylinders, Accumulators, Rotary Actuators & Rotary Distributors
