Diaphragm-type accumulator

Note that diaphragm-type accumulators can be checked more easily and are more reliable than the less expensive bladder type. Here, a rubberized nylon diaphragm separates the nitrogen charge from the oil. An indicator rod protrudes into a transparent plastic dome and gives accurate, visual indication of tlie true volumes of nitrogen and lube oil. 

Pressurized accumulators contain compressed gas on one side of a piston, flexible diaphragm, or bladder. On the other side is the fluid which is discharged as necessary to an external system, normally to provide power. If a piston rod is added to a piston-type accumulator and the system is closed, it becomes a shock absorber using the fluid under pressure to absorb repeated shocks or sudden impulses. 

Despite their common usage, direct radiators achieve their modern success through the accumulated improvement of many decades of experience with such diverse problems as voice coil heat buildup, diaphragm nodes, enclosure types, and the compHcations of multiple radiator/crossover networks. 

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