Technology
Why Piston Accumulator
There are three different accumulator technologies commonly used. These are membrane, bladder and piston accumulators.
Each type of accumulator has advantages and limitations that must be considered. When choosing your accumulators, you should take into consideration such factors as response time, system speed, mounting orientation, fluid type, pressure, temperature, diagnostic characteristics, maintenance and service intervals as well as costs for servicing and downtime.
KEY ADVANTAGES
HIGHEST FLOW RATE
LOWEST GAS PERMEATION
OPTIMIZATION FOR SYSTEM REQUIREMENTS
FLEXIBLE MOUNTING POSITION
| FEATURE / TYPE OF ACCUMULATOR | PISTON | BLADDER | MEMBRANE |
|---|---|---|---|
| Oil flow rate | High | Low | Medium |
| Compression ratio | 10:1 | 4:1 | 6:1 |
| Horizontal mounting position | Yes | No | Medium |
| Size optimization for system requirements | Yes | No | No |
| Space requirement | Small | Large | Medium |
| Sensoring ( e.g. pressure and piston position monitoring) | Yes | No | No |
| Tolerance of low temperature | - 45°C | - 25°C | - 25°C |
| Extra gas tank connection | Yes | Yes | No |
| Dual functionality (dual piston or gas chamber) | Yes | No | No |
| Gas permeation (loss off pre-charge pressure) | Very low | High | High |
| Service interval | Long | Short | Short |
| Response time | Medium | Medium | High |
| Tolerance for dirt | Low | High | Medium |
| Pre-charge lost in case of failure | Gradual | Immediate | Immediate |