在石油、化工等科研单位的小型试验装置上,经常需要检测和控制参加反应的微小物料流量。对于液体的进料系统,多采用计量泵实现流量控制,但试验中的微小流量控制,仍然是国内、外科研部门的难点。鉴于我国的具体情况,试验中的微小流量,多采用手动微量调节阀控制,这种控制方式频 In the small test units of petroleum, chemical and other scientific research units, it is often necessary to detect and control the flow of small materials that participate in the reaction. For the liquid feed system, the use of metering pumps to achieve flow control, but the test of small flow control, is still the difficulty of domestic and foreign research departments. In view of the specific circumstances of our country, the test of small flow, multi-use manual micro-control valve control, this control frequency