Patent ID: 7717682

Claim:
A pump for moving a process fluid, the pump comprising: a first inlet pressure-activated diaphragm valve, a first outlet pressure-activated diaphragm valve, a second inlet pressure-activated diaphragm valve, and a second outlet pressure activated diaphragm valve; a first pump chamber comprising a pressure-activated diaphragm, wherein the first pump chamber achieves fluid communication with an input line via the first inlet pressure-activated diaphragm valve, and wherein the first pump chamber achieves fluid communication with an outlet line via the first outlet pressure-activated diaphragm valve; and a second pump chamber comprising a pressure-activated diaphragm, wherein the second pump chamber achieves fluid communication with the input line via the second inlet pressure-activated diaphragm valve, and wherein the second pump chamber achieves fluid communication with the outlet line via the second outlet pressure-activated diaphragm valve; wherein the diaphragm of the first inlet pressure-activated diaphragm valve and the diaphragm of the first pump chamber are simultaneously moved by a first motive fluid; wherein the diaphragm of the second inlet pressure-activated diaphragm valve and the diaphragm of the second pump chamber are simultaneously moved by a second motive fluid; wherein the first pump chamber and the first inlet pressure-activated diaphragm valve are in fluid communication with the second outlet pressure-activated diaphragm valve; and wherein the second pump chamber and the second inlet pressure-activated diaphragm valve are in fluid communication with the first outlet pressure-activated diaphragm valve.