产品详情
产品简介：
泄压持压阀一般分为隔膜阀和活塞阀两大类，本公司生产的泄压持压阀口径在DN400mm以下者采用隔膜型，口径在DN450mm以上者采用活塞型，两者之动作原理类似。泄压持压阀在给水管线上能有效地将超过导阀安全设定值的压力泄压释放，防止对管线与设备因超压而损坏。该阀主要用于高层大楼消防测试循环系统的泄压，以防止水压过高造成系统故障。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：DN20-400活塞式：DN450-800
| 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 |
| 出口压力可调范围Pressure of Export（MPa） | 0.09~0.8 | 0.10~1.2 | 0.15~1.6 |
| 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 | 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 |
