產(chǎn)品簡介：
泄壓持壓閥一般分為隔膜閥和活塞閥兩大類，本公司生產(chǎn)的泄壓持壓閥口徑在DN400mm以下者采用隔
膜型，口徑在DN450mm以上者采用活塞型，兩者之動作原理類似。泄壓持壓閥在給水管線上能有效地將
超過導閥安全設(shè)定值的壓力泄壓釋放，防止對管線與設(shè)備因超壓而損壞。該閥主要用于高層大樓消防測試
循環(huán)系統(tǒng)的泄壓，以防止水壓過高造成系統(tǒng)故障。
Products Introduction:
Decompression or sustaining valves are usually divided into diaphragm valves and piston valves two categories, the caliber of the company’s production bellows DN500 using diaphragm type, and DN600 more in the use of piston type, whichever is the principle of similar moves. In the water supply pipeline, decompression and sustaining valves can release the pressure effectively which over the safety valve settings, prevent the pipeline and equipments are damaged by the excess pressure. The valves are mainly used in the decompression of the fire protection test circle system; prevent the system failure because of the excess pressure.
主要零部件材質(zhì)：Material of Main Parts:
序號Sequence Number | 部件名稱 Part Name | 材質(zhì)Material |
1 | 閥體Body | 灰鑄鐵Cast Iron |
2 | 軸套Busing | 不銹鋼Stainless Steel |
3 | 閥座Seat | 青銅Bronze |
5 | 密封Seal | EPDM |
6 | 閥板Disc | 灰鑄鐵Cast Iron |
7 | 墊片F(xiàn)lake | EPDM with Nylon |
9 | 螺母Bonnet | 灰鑄鐵Cast Iron |
10 | 彈簧Spring | 不銹鋼 Stainless Steel |
11 | 轉(zhuǎn)軸 Stem | 不銹鋼 Stainless Steel |
主要性能參數(shù)Main Performance Parameters:
隔膜式：DN20-400
活塞式：DN450-800
公稱壓力Nominal Pressure PN（MPa） | 1.0 | 1.6 | 2.5 |
法蘭連接標準Flange Design Standard | GB/T 17241.6-1998 | GB/T9113.1-2000 |
殼體試驗壓力 Shell Testing Pressure（MPa） | 1.5 | 2.4 | 3.75 |
密封試驗壓力 Sealing Testing Pressure（MPa） | 1.1 | 1.76 | 2.75 |
出口壓力可調(diào)范圍 Pressure of Export（MPa） | 0.09~0.8 | 0.10~1.2 | 0.15~1.6 |
工作溫度Working Temperature | 0℃~80℃ |
適用介質(zhì)Suitable Mediums | 水Water |
主要外形尺寸和連接尺寸：Outline Dimensions & Connection Dimensions:
公稱通徑 Nominal Diameter DN (mm) | L | A | A1 | H | H1 | F |
20 | 180 | 330 | 130 | 550 | 460 | 116 |
25 | 180 | 330 | 130 | 550 | 460 | 116 |
32 | 180 | 330 | 130 | 550 | 460 | 116 |
40 | 240 | 345 | 135 | 610 | 516 | 170 |
50 | 240 | 345 | 135 | 610 | 516 | 170 |
65 | 250 | 355 | 140 | 625 | 520 | 180 |
80 | 285 | 360 | 146 | 645 | 538 | 210 |
100 | 360 | 400 | 156 | 750 | 596 | 275 |
125 | 400 | 420 | 170 | 808 | 655 | 310 |
150 | 455 | 435 | 186 | 864 | 710 | 355 |
200 | 585 | 480 | 206 | 1135 | 805 | 460 |
250 | 650 | 530 | 226 | 1185 | 855 | 500 |
300 | 800 | 575 | 246 | 1325 | 955 | 580 |
350 | 860 | 620 | 275 | 1385 | 990 | 650 |
400 | 960 | 635 | 286 | 1445 | 1030 | 715 |
450 | 970 | 665 | 320 | 1325 | 905 | 780 |
500 | 1075 | 695 | 348 | 1430 | 960 | 830 |
600 | 1230 | 720 | 372 | 1565 | 1020 | 920 |
700 | 1650 | 770 | 422 | 1755 | 1160 | 980 |
800 | 1750 | 805 | 458 | 2230 | 1515 | 1050 |
