How to Size & Select a Hydraulic Accumulator

Sizing a hydraulic accumulator means matching the type, volume and pre-charge to your system pressure, the amount of fluid you need to store or absorb, and the job the accumulator is doing. Get it right and the accumulator performs and lasts; get it wrong and you’ll see spongy operation, rapid cycling, or early failure. Northland sizes and selects accumulators for industrial and mobile systems across Edmonton and Alberta — send us your details and we’ll spec it with you.

What accumulator sizing depends on

The right accumulator comes down to a handful of variables:

●        System / working pressure (and maximum pressure)

●        Fluid volume to store or absorb

●        Function — energy storage, shock absorption, pulsation dampening, or emergency power

●        Flow rate and duty cycle

●        Temperature range and mounting constraints

Choosing the type

Type matters as much as size. Bladder accumulators suit fast response and shock and pulsation dampening; piston accumulators handle high flow, large volumes and high pressure; diaphragm accumulators fit compact, low-volume circuits and instrumentation. We’ll recommend the type that fits your application, not just the one on the shelf.

Setting the pre-charge

Sizing includes the nitrogen pre-charge, which is set relative to your system pressure and the accumulator’s job. We set and verify pre-charge as part of supply, so the unit arrives ready to install and perform. See accumulator nitrogen charging.

Get Sizing Help
Call 780-466-1172

Frequently Asked Questions

  • Match the type, volume and pre-charge to your system pressure, the fluid volume you need to store or absorb, and the accumulator’s function and duty cycle. Send us those details and we’ll size and select the right unit.

  • System/working pressure, required fluid volume, the function (storage, shock, pulsation, emergency power), flow and duty cycle, and any temperature or mounting constraints. The more you can tell us, the tighter the spec.

  • It depends on your application — there’s no single answer, which is why we size to your numbers. Send your system pressure and volume and we’ll recommend the right type and size.

  • Yes — we’ll recommend bladder, piston or diaphragm based on your pressure, flow, volume and space, and explain why.

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