A pump module 12 for use in a medical fluid dispensing system 10 is provided that includes a pump body 50 having first and second portions 54, 56 where at least one of the first and second portions includes first and second fluid chambers 62a, 62b The module 12 further includes at least one membrane operably associated with the fluid chambers 62a, 62b, and first and second actuators 88a, 88b operably associated with this membrane 82 for the purpose of displacing the membrane 82 and further for displacing fluid from the first and second chambers 62a, 62b.