The silencing check valve is a type of head end valve that connects a water pump to a pipeline, and its nature is very important because it is responsible for ensuring the safety of the pipeline.
The soundproof check valve consists of a valve body, a valve disc, a valve stem, and a spring. The valve body is made of ductile iron casting and coated with epoxy resin to prevent fluid corrosion. The spring's own reaction force is used to quickly close the valve at the moment of pump stop, preventing the formation of air gaps in the pipeline and the phenomenon of water hammer. It also effectively prevents the impact sound caused by the gravity and movement direction of the water flow in the pipeline, achieving the goal of noise reduction. Therefore, the soundproof check valve is also known as a waterproof hammer check valve. The 304 stainless steel spring is specially tuned through a special process to prevent fatigue and pressure loss, maintaining excellent elasticity and ensuring the durability of the valve. It solves the problem of replacement caused by weak spring and loose closure for users. And maintenance issues.

Check valves can prevent the backflow of internal media, but they have a disadvantage of generating significant noise. In some situations, it is necessary to reduce noise, so soundproof check valves are developed.
The principle of noise reduction for check valves: Ordinary check valves produce noise mainly due to the impact of water flow and flow rate during the passage of water, resulting in energy loss. These energy losses generate water hammer, causing noise; The internal water flow path of the soundproof check valve adopts a streamlined design, which reduces the head loss and is about 1/2-1/3 compared to ordinary check valves; At the same time, due to the spring-loaded valve disc of the silencing check valve, it closes quickly when the pump is stopped, and has already closed before water hammer occurs, so it will not produce noise. Therefore, the silencing check valve is also called a quick closing silencing check valve.