Abstract: Provided is a system for dispensing fluid. The system includes a housing defining a chamber; an inflatable bag disposed in the chamber and adapted to contain a fluid, the bag being in fluid communication with a flow path for flow of the fluid out of the bag; and a pressure source for inflating the bag to force the fluid from the bag to the flow path at a controlled rate. The bag inflates against an inner surface of the housing such that, prior to the bag being fully inflated, the fluid contained in the bag is forced from the bag at the controlled rate.

Abstract: Provided is a system for dispensing fluid. The system includes a housing defining a chamber; an inflatable bag disposed in the chamber and adapted to contain a fluid, the bag being in fluid communication with a flow path for flow of the fluid out of the bag; and a pressure source for inflating the bag to force the fluid from the bag to the flow path at a controlled rate. The bag inflates against an inner surface of the housing such that, prior to the bag being fully inflated, the fluid contained in the bag is forced from the bag at the controlled rate.

Abstract: An electropneumatic transducer which operates quickly and accurately over a broad range of pressures to control high pressure, high flow devices at their point of operation. The transducer is lightweight and insensitive to position or vibration, and can be readily mounted to the device to be controlled at its workpoint and operated remotely by a process controller or other electrical device. There is also provided both internal and external feedback whereby the repeated accurate operation of the transducer is assured.