To enable the safe, and sure measurement/delivery of fluid by installing dual stream pumps which receive a hot melt adhesive from a hopper and a discharge dual streams, a pressure relief valve in a flow course connected to the outlet side of each pump and a volume type flow meter in one flow course.

A hot melt adhesive delivery system 10 has a hopper 12 fitted to the delivery system body 11, and a heating element 16 is embedded in a wedge forming the bottom part of the hopper 12. The suction passage 26 of a volume type pump 32 of dual output is opened to the outlet passage 24 of the hopper 12. The passage 26 is divided into two passages which are connected to pumps 18, 19, respectively. Hot melt adhesive flow courses 38, 40 are connected to the outlet sides of the pumps 18, 19, and a filter recession 52 and a volume type flow meter 56 are formed in one course 38. Pressure relief valves 60, 74 are installed in the flow courses 38, 40, and when each valve 60, or 74 is opened by the increase of pressure, a part of the flow is returned to the hopper 12 through passages 64, 66.