Importance

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Abstract

A fluid powered diaphragm pump is provided which includes three means for supplementing the pilot valve signal to the main fluid valve spool. The means include a cross porting of the main fluid valve spool, or engineered orifices that communicate pressurized air being delivered to one of the inner diaphragm chambers of the pump to the main fluid valve spool by way of either the intermediate bracket or the pilot valve housing. Design features also include the location of the pilot valve assembly immediately below the pressurized fluid inlet cap and between the inlet cap and the main fluid valve assembly. Further, an integrated exhaust muffler is mounted directly to the main fluid valve housing and the main fluid valve housing includes a segmented sleeve assembly which makes it easier to service the main fluid valve assembly and, specifically, the main fluid valve spool. Further, proximity sensors are provided at either end of the main fluid valve spool and an interface is provided to connect the pump to electronic monitoring equipment.

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First Claim