一、結構及用途 Structure and purpose

      該閥是采用高精度先導式控制流量，適用于控制流量和壓力管路，保持預定流量不變，將過大流量限制在一個預定值，并將上游高壓適當減低，即使主閥上游的壓力變化也不會影響下游的流量，該閥一改常規節流閥及使用孔扳或純機械地減少流域面積的原理，利用相關導閥，最大限度地減少能量在節流過程中的損失，該閥控制靈敏、安全可靠、調試簡單、使用壽命長。

This valve uses a high accuracy pilot operated flow control and is suitable for flow and pressure pipeline control to keep the preset flow unchanged.1imit an extra-big flow at a preset value and properly lower the high pressure on the upstream．the flow at the downstream will not be affected even if the pres-sure of the main valve at the upstream varies.1t changes the principle for a throttle valve to reduce the basin area purely mechanically or by way of using orifices and utilizes the related pilot valve to reduce the energy loss during throttling to the utmost extent and features sensitive control,safety,reliability,easy debugging and long duration.

四、主要外形及連接尺寸 Schematic diagram of installation

注：安裝示意圖中彈性座封閘閥或蝶閥任選，建議≥DN350選蝶閥。

Note：Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic diagram of installation.Recomended to select the butterfly valve in case of≥DN350