Low Powered Pneumatic Control Converter

A pneumatic control converter comprising:

• a pneumatic section comprising:
• a supply air port for receiving pressurized air;
• a branch port for outputting a pneumatic control signal via air at a controlled pressure less than the pressurized air;
• and
• a valve arrangement between the supply air port and the branch port, the valve arrangement controlling pressure transfer from the supply air port to the branch port based upon position of a control member;
• and
• a linkage providing a biasing force influencing the position of the control member in the valve arrangement, the linkage comprising a spring formed shape retaining elastic spring material which does not flex based upon temperature.

A pneumatic control converter comprising:

• a pneumatic section comprising:
• a supply air port for receiving pressurized air;
• a branch port for outputting a pneumatic control signal via air at a controlled pressure less than the pressurized air;
• and
• a valve arrangement between the supply air port and the branch port, the valve arrangement controlling pressure transfer from the supply air port to the branch port based upon position of a control member;
• and
• a mechanical linkage section, comprising:
• a rotary motor having a stator and a rotor;
• a rotary cam mounted on the rotor of the rotary motor;
• a cam follower which changes elevation based on the rotational position of the rotary cam;
• and
• a linkage transferring the elevation of the cam follower into a force biasing the position of the control member.