Pressure responsive governor device.

摘要

A fluid pressure responsive governor device (1) for governing the operation of a compressor or a compressor unloader has a spring-biassed valve device (13,14) controlling connection of an output port (3) to an input port (2) or to atmosphere according to the valve of a controlling reservoir pressure at the input port, the valve arrangement being positively held in the former condition by virtue of enhanced area exposed to the controlling pressure and the valve arrangement being provided by a seal (13) which is sealingly slideable in a tubular opening (14) so as to be able to execute movement due to predetermining pressure changes without resulting in switching over to the other condition.