產(chǎn)品簡介：
緩閉式止回閥一般分為隔膜閥和活塞閥兩大類，本公司生產(chǎn)的緩閉式止回閥口徑在DN500mm以下者采用隔膜型，口徑在DN600mm以上者采用活塞型，兩者之動作原理類似。緩閉式止回閥具有開啟和關(guān)閉速度調(diào)控和逆止功能，閥門安裝能有效控制水泵在啟動與停止轉(zhuǎn)動時會自動調(diào)節(jié)到***開啟和關(guān)閉的速度。廣泛適用于工業(yè)給水、高層建筑由水泵直接給水系統(tǒng)中，有效減少水錘及水擊現(xiàn)象產(chǎn)生，達(dá)到安全關(guān)閉效果。
Products Introduction:
Dashpot check 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. Dashpot check valve has the function of opening or cutting the speed control and pawl, it can control the water pump availably when the water pump is opening and stopping, the valve will regulate the speed of opening or closing automatically to the best state. It is widely used in the system whose water is supplied by the water pump, such as the industrial water supply、tall building water supply, effectively reduce the times of the water hammer and water beat, up to the safely effect of the closure.
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：DN20-500
活塞式：DN600-800
公稱壓力Nominal Pressure PN（MPa） | 1.0 | 1.6 | 2.5 |
法蘭連接標(biāo)準(zhǔn)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 |
***入口壓力 Max Pressure of Entrance（MPa） | 1.0 | 1.6 | 2.5 |
***動作壓力Min Pressure of Motion（MPa） | ≥0.07 |
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 | 282 | 200 | 172 | 106 | 116 |
25 | 180 | 282 | 200 | 172 | 106 | 116 |
32 | 180 | 282 | 200 | 172 | 106 | 116 |
40 | 240 | 320 | 210 | 265 | 210 | 170 |
50 | 240 | 320 | 210 | 265 | 210 | 170 |
65 | 250 | 330 | 215 | 310 | 215 | 180 |
80 | 285 | 350 | 220 | 350 | 245 | 210 |
100 | 360 | 410 | 230 | 460 | 305 | 275 |
125 | 400 | 420 | 245 | 520 | 365 | 310 |
150 | 455 | 430 | 260 | 570 | 415 | 355 |
200 | 585 | 440 | 280 | 695 | 510 | 460 |
250 | 650 | 450 | 300 | 780 | 560 | 500 |
300 | 800 | 460 | 320 | 905 | 658 | 580 |
350 | 860 | 470 | 340 | 1025 | 696 | 650 |
400 | 960 | 480 | 360 | 1080 | 735 | 715 |
450 | 970 | 530 | 395 | 1030 | 610 | 780 |
500 | 1075 | 580 | 420 | 1135 | 665 | 830 |
600 | 1230 | 600 | 445 | 1270 | 725 | 920 |
700 | 1650 | 730 | 495 | 1460 | 865 | 980 |
800 | 1750 | 830 | 530 | 1640 | 925 | 1050 |
