| 摘要 |
PURPOSE:To perform the predetermined flow ratio mixing and to enable the flow regulation, by feeding two kinds of gas to a dividing selector through a diaphragm regulator then feeding through a thin pipe group to a mixing section and taking out of said section. CONSTITUTION:It is controlled such that the primary pressure of the second gas 3 and the pressure 14 of the first gas 2 will be equalized. Upon rotation of a selector cock to the direction (a), for example, the number of the thin pipe groups 71-75 connecting to the first gas path 2 will increase while the number of communication with the second gas path 3 will decrease. Consequently the mixing ratio of the first and second gas 2, 3 flowing into the mixing section 8 can be controlled to the predetermined ratio. The mixed gas is taken out from the mixing section 8 through a throttle 10. Since it is mixed with the ratio to be determined by the number of the thin pipe groups 71-75 at the upstream of the throttle 10, the desired mixing ratio can be maintained even when the flow is regulated by the throttle 10. |
