产品详情
产品简介：
缓闭式止回阀一般分为隔膜阀和活塞阀两大类，本公司生产的缓闭式止回阀口径在DN500mm以下者采用隔膜型，口径在DN600mm以上者采用活塞型，两者之动作原理类似。缓闭式止回阀具有开启和关闭速度调控和逆止功能，阀门安装能有效控制水泵在启动与停止转动时会自动调节到***开启和关闭的速度。广泛适用于工业给水、高层建筑由水泵直接给水系统中，有效减少水锤及水击现象产生，达到安全关闭效果。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 co
ntrol and pawl, it can co
ntrol 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. 主要零部件材质：Material of Main Parts:
| 序号Sequence Number | 部件名称Part Name | 材质Material |
| 1 | 阀体Body | 灰铸铁Cast Iron |
| 2 | 轴套Busing | 不锈钢Stainless Steel |
| 3 | 阀座Seat | 青铜Bronze |
| 5 | 密封Seal | EPDM |
| 6 | 阀板Disc | 灰铸铁Cast Iron |
| 7 | 垫片Flake | EPDM with Nylon |
| 9 | 螺母Bonnet | 灰铸铁Cast Iron |
| 10 | 弹簧Spring | 不锈钢Stainless Steel |
| 11 | 转轴Stem | 不锈钢Stainless Steel |
主要性能参数Main Performance Parameters:隔膜式：DN20-500活塞式：DN600-800
| 公称压力Nominal Pressure PN（MPa） | 1.0 | 1.6 | 2.5 |
| 法兰连接标准Flange Design Standard | GB/T 17241.6-1998 | GB/T9113.1-2000 |
| 壳体试验压力Shell Testing Pressure（MPa） | 1.5 | 2.4 | 3.75 |
| 密封试验压力Sealing Testing Pressure（MPa） | 1.1 | 1.76 | 2.75 |
| ***入口压力Max Pressure of Entrance（MPa） | 1.0 | 1.6 | 2.5 |
| ***动作压力Min Pressure of Motion（MPa） | ≥0.07 |
| 工作温度Working Temperature | 0℃~80℃ |
| 适用介质Suitable Mediums | 水Water |
主要外形尺寸和连接尺寸：Outline Dimensions & Co
nnection Dimensions:
| 公称通径Nominal DiameterDN (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 |
