Non Slam Nozzle Check Valve Manufacturer, China non slam nozzle check valve factory and supplier. Non slam nozzle check valve also is a kind of non slam or silent check valve, which is designed as a self-actualizing device and responds in a piping system to either pressure or flow changes. The main purpose of a non slam nozzle check valve is to restrict or shut off the flow in the reverse flow direction. The important thing is that the normal position of a nozzle check valve is a valve close position with silent and non-slam closing action.
 

What is a Non Slam Nozzle Check Valve?

An non slam nozzle check valve is a kind of silent check valve. The non slam nozzle check valve is driven by the medium itself and automatically opens and closes the valve disc. Generally, it is used to prevent the backflow of fluid or gases. A non slam nozzle check valve can be called a one-way valve, non-return valve, backflow valve, backstop valve, and back pressure valve. Non slam nozzle check valve has been a popular industrial valve since 2008. This nozzle check valve has the function of the general check valve and is designed with a shock-absorbing spring, combined metal seat, and soft seat structure, which is easy for end-user maintenance on site.
 

The non slam nozzle check valve adopts a particular sealing structure. Whether the downstream pressure is high or low, the valve is permanently closed tightly and has excellent shutoff performance. It overcomes the disadvantage of the lack of shutoff performance of the general check valve at low back pressure. The non slam nozzle check valve that has a unique axial flow shuttle structure. It has the advantages of small flow resistance, significant flow coefficient, compact design, etc. It is the best valve for oil and gas gathering and transmission pipeline systems, especially for the outlet of oil transmission pumps.
 

Why Use Non Slam Nozzle Check Valve?

The primary function of a non slam nozzle check valve is to prevent the water hammer and closing rapidly without slamming. When flow is reversed in a pipeline, it will cause hydraulic shock waves to pass through the valve, it also called the water hammer phenomenon. The water hammer can cause damage to the equipment in the pipeline, so we must prevent this phenomenon. So selecting the right non slam nozzle check valve is the best way to prevent damage from occurring and causing serious issues at the site when the nozzle check valve is in a fully closed position during reverse flowing through.

Working Principle of Non Slam Nozzle Check Valve

An non slam nozzle check valve is a kind of non-slam check valve, when the valve closes it won’t have a slamming phenomenon, and there are no excess pressure spikes are generated. Non slam nozzle check valve is simply designed with spring-loaded and a single low-mass valve disc that enables fast response, and dynamic reaction to the reduction in flow. The working principle is easy to understand, when the disc of the non-slam nozzle check valve is opening, the force of the single disc and spring is balanced that resulting in uniform flow.
 

When the pressure difference between the upstream and downstream of the nozzle check valve exceeds the crack pressure of the spring, the obturator moves and allows flow. With the venturi design that the flow area of the nozzle check valve steadily decreases to the seat diameter, and the reduced flow area increases the dynamic pressure and reduces the static pressure, allowing the nozzle check valve to open fully and quickly. The spring is selected to allow the disc to open fully and stabilize on its backstop under normal flow conditions. When the flow rate is significantly reduced, the spring responds in advance to the force of the reduced flow.

Non Slam Nozzle Check Valve Application

1. Water hammer prevention system
2. Pump discharge application
3. Cooling water systems(Ethylene, LNG)
4. Waterworks & transmission systems
5. Potable & raw water
6. Transmission pipeline compressor discharge
7. LNG compressor train
8. Multiphase pumping
9. Subsea pump and flowline application