Series AHN42F Parallel Type Safety Check Valve
AHN42F平行式安全回流阀
AHN42F parallel safety reflux valve is a special valve that integrates safety relief and check functions, designed specifically for pump outlet pipelines and pressure systems that require prevention of medium backflow. It adopts a parallel valve disc structure, and the valve disc moves parallel to the fluid channel inside the valve body, with smooth opening and closing. When the system pressure exceeds the set safe value, the valve opens as a safety valve to release pressure; When the pump stops or the downstream pressure is higher than the upstream, the valve acts as a check valve and automatically closes to prevent the medium from flowing back. The sealing surface is directly processed from the valve body material ("F" type), which is economical and durable. This valve is dual-use, simplifying pipeline design and providing integrated safety protection and hydraulic control for pumps and pressure systems. Mainly installed in the outlet pipeline of centrifugal pumps, water supply systems, fire pump sets, industrial circulating water systems, petrochemical plants, and boiler feedwater systems. Used to prevent system overpressure, avoid backflow and water hammer hazards during pump shutdown, and prevent medium backflow from causing damage to the pump, it is a commonly used multifunctional protective valve in pump pipelines.
特点
1.安全泄压与止回双功能
集成安全阀与止回阀于一体。超压时自动开启泄放保护系统;停泵或背压升高时自动关闭,防止介质倒流和水锤危害。
2.平行式阀瓣结构
阀瓣平行于流体通道运动,启闭平稳,流阻小,密封副磨损均匀,使用寿命长。
3.阀体密封面(“F”型)
密封面由阀体材料直接加工或堆焊而成,经济实用,耐磨损,适用于水、油品等非强腐蚀性介质。
4.弹簧加载,动作可靠
采用弹簧直接载荷机构,提供稳定的开启压力和止回关闭力,动作灵敏可靠。
5.结构紧凑,简化管路
一个阀门实现两种功能,减少了管道上所需的阀门数量和安装空间,降低系统成本。
6.适用介质广泛
阀体材料可选碳钢、不锈钢等,适用于水、油品、蒸汽等多种介质。
性能规范表
安全阀进出口法兰规定
The flange standards for the inlet and outlet of the safety valve are specified as follows (Mpa):
| 安全阀公称压力 PN Safety valve nominal pressure PN | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 | 32.0 |
| 进口法兰压力 Mpa Inlet flange pressure class Mpa | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 | 32.0 |
| 出口法兰压力 Mpa Outlet flange pressure class Mpa | 1.6 | 1.6 | 1.6 | 4.0 | 4.0 | 4.0/16.0 | 16.0 |
进出口通径按下规定:
The inlet and outlet diameters are specified as follows:
| 安全阀型式 Safety valve type | 微启式 Micro-opening type | 全启式 Full-opening type |
| 进口通径 DN Inlet diameter DN | 同公称通径 Same as nominal diameter | 同公称通径 Same as nominal diameter |
| 出口通径 DN Outlet diameter DN | 同公称通径 Same as nominal diameter | 比公称通径增大一级或一级以上 One or more sizes larger than nominal diameter |
结构图
零部件名称材料表
| 序号 (No.) | 零件名称 (Part Name) | 材料 (Material) |
| 1 | 阀体 (Valve Body) | WCB |
| 2 | 阀瓣 (Disc / Disc Flap) | 2Cr13 |
| 3 | 导向套 (Guide Sleeve) | 2Cr13 |
| 4 | 阀杆 (Stem) | 2Cr13 |
| 5 | 阀盖 (Bonnet) | WCB |
| 6 | 弹簧 (Spring) | 50CrVA |
| 7 | 阀帽 (Cap) | WCB |
外形安装尺寸表
| 公称压力Nominal Pressure PN(MPa) | 公称通径Nominal Diameter DN(mm) | 尺寸(mm)Dimensions (mm) | ||
| d0 | L | H | ||
| 1.6 2.5 4.0 | 40 | 25 | 200 | 240 |
| 50 | 40 | 230 | 270 | |
| 80 | 50 | 310 | 490 | |
| 100 | 80 | 350 | 550 | |
| 150 | 100 | 480 | 710 | |
