Patent ID: 8794588

Claim:
An actuator regulating valve apparatus comprising: an actuator assembly operably installed within a valve body assembly of the apparatus, the actuator assembly comprising: a piston travel stop seating member; a piston operable within the piston travel stop seating member and having an effective working surface defining an effective working area; and a pushrod installed on the piston and operably engaged with the valve body assembly; a bellows assembly operably installed adjacent to the actuator assembly and comprising: a bellows assembly base installed on the piston travel stop seating member so as to be spaced from the piston and having formed therein an orifice for fluid communication therethrough, the orifice having a through area that is approximately 0.05% to 5% of the effective working area of the piston, the bellows assembly base defining in conjunction with the piston travel stop seating member and the piston effective working surface a piston exterior space; a bellows assembly wall installed on the bellows assembly base; a bellows assembly end cap installed on the bellows assembly wall substantially opposite the bellows assembly base, the bellows assembly end cap having formed therein a port for communication therethrough of a fluid; and a bellows installed on the bellows assembly end cap such that a bellows interior space is in fluid communication with the port and further such that a bellows exterior space as bounded by the bellows, the bellows assembly end cap, the bellows assembly wall, and the bellows assembly base is in fluid communication with the piston exterior space and thus the effective working surface of the piston by way of the orifice; and a non-compressible liquid substantially filling the bellows exterior space, the orifice, and the piston exterior space, whereby movement of the bellows based on pressure changes in the fluid translates to movement of the piston as acted on by the liquid and regulated by the orifice.