G300X沟槽缓闭式止回阀由主阀、单向阀、针型阀、球阀、微形过滤器和压力表组成水力控制接管系统。利用水力自动操作,可使主阀得到迅速的开启或缓慢的关闭速度。防止水锺水击的产生,以达到缓闭消声的效果。当缓闭止回阀从进口端给水时,水通过微形过滤器、针型阀、单向阀进入主阀控制室,再经过球阀排水至下游。因为针型阀开度小于球阀开度,即主阀控制室的排水速度大于进水速度,因此控制室压力降低,作用于主阀盘下端的进口压力打开主阀向下游供水。当管道停止供水时,若下游水开始回流,一部分回流水经球阀进入主控制室,由于单向阀作用,回流水不能从主控制室流出,引起主控制室逐渐升压,缓缓关闭主阀。
Performance Characteristics
- Novel and reasonable structure, rational use of hydraulic principle cybernetics.
- Smooth and reliable operation and high flow rate.
- 阀瓣快开慢闭、无水锤冲击(关闭时间可调)。
- Good check sealing and long service life time.
- Easy to install and maintain.
Product Parameters
Product Model | G300X-16Q |
Valve body material | Ductile Iron |
Nominal pressure | ≤1.6Mpa |
Applicable medium | Water and so on |
Applicable temperature | ≤80°C |
Product Size Reference

Nominal Diameter | external diameter (including thickness of the wall) | lengths |
DN65 | 76 | 232 |
DN80 | 89 | 260 |
DN100 | 114 | 285 |
DN150 | 165 | 365 |
DN200 | 219 | 400 |












