產品介紹
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
公稱通徑 DN(mm) 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 L 180 180 180 203 203 216 241 292 330 356 495 622 698 787 914 978 978 PN10 D 105 115 135 145 160 180 195 215 245 280 335 390 440 500 565 615 670 D1 75 85 100 110 125 145 160 180 210 240 295 350 400 460 515 565 620 PN16 D 105 115 135 145 160 180 195 215 245 280 335 405 460 520 580 640 705 D1 75 85 100 110 125 145 160 180 210 240 295 355 410 470 525 585 650 PN25 D 105 110 135 145 160 180 195 230 270 300 360 425 485 550 610 660 730 D1 75 85 100 110 125 145 160 190 220 250 310 370 430 490 550 600 660 H 342 342 342 395 395 405 430 510 560 585 675 730 760 840 910 1030 1135 H1 247 247 247 278 278 298 313 350 365 420 450 470 490 526 570 610 665 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
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