Fluid pressure regulator construction

摘要

A housing is provided with a fluid pressure supply inlet and a reduced fluid pressure outlet separated by a valve seat that is controlled by a valve member having a piston head subjected to intermediate fluid pressure intermediate the valve seat and the outlet so as to cause movement of the valve member relative to the valve seat in relation to the intermediate fluid pressure to tend to regulate the intermediate fluid pressure to a predetermined amount with the housing having a relief valve unit for relieving excess intermediate fluid pressure, the piston head itself including the relief valve unit for relieving the excess intermediate fluid pressure acting thereon.