消声止回阀适用于给排水、消防、暖通系统，阀瓣采用进出口两端中心轴导向，启闭灵活，可水平安装或垂直安装。阀瓣采用弹簧加载，其快速关闭能有效的消除水锤，密封性能好关闭无噪声。它具有体积小、重量轻、流体阻力小、耐疲劳、寿命长等优点。

Silent check valve is applicable to water supply and draining, fire fighting and HVAC system. The valve flap adopts center shaft orientation in both end of import and export with flexible start and stop to choose horizontal or vertical installment. The valve flap uses spring load for quick close down to effectively eliminate water hammer with good sealing property and noiseless close. The silent check valve has the advantage of small volume, light weight, small resistance of fluid, fatigue resistance and long life span.