一、結構及用途 Structure and purpose
該閥用于空調系統(tǒng)供/回水之間以平衡壓差的閥門，可提高系統(tǒng)的利用率，保持壓差的準確恒定值，并可限度地降低系統(tǒng)的噪音，以及過大壓差對設備造成的損壞。該閥于其它平衡閥，它不需其它執(zhí)行機械，靠介質自身的壓力差來達到系統(tǒng)平衡之功能，節(jié)約能源及安裝場地空間。
A valve used between water supply/back of an air conditioning system order to balance the pressure differential and able to raise the system's utility．keep the pressure differential at an accurately constant value and to lower ths system's noise and the damage to the equipment due to an extra-big pressure differential to the utmost extent．1t is superior to the other balancing valves，needs no other execution machinery.gets the system balanced completely depend-ing on the pressure differential of the medium's own and saves energy and the installation space．
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 | 550 | 560 | 575 | 590 | 610 | 625 | 642 | 750 | 808 | 864 | 1135 | 1185 | 1325 | 1385 | 1445 | 1545 | 1720 | |
| H1 | 125 | 130 | 135 | 145 | 160 | 180 | 200 | 270 | 310 | 320 | 370 | 430 | 480 | 525 | 580 | 635 | 705 | |
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.Recommended to select the butterfly valve in case of≥DN350
