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The comprehensive feature of the plug valve is that it has a long service life and high reliability. It is a good choice for many corrosive, abrasive, highly toxic, continuous operation media and devices, and has application advantages and extensive applications in the chemical industry.
The structure of piston check valve is similar to globe valve,but these two kinds of have have some differences between globe valve and piston check valve,the operation of piston check valve is flow automatic,the globe valve have a handwheel to operating,this is most difference of valve’s type.
Knife gate valve is kind of gate valve,but there is still have difference between gate valve and knife gate valve.The gate valve is a gate of the opening and closing part. The direction of movement of the gate is perpendicular to the direction of the fluid.
The isolation valve belongs to the on/off type valve, which is only in the open or closed state. Isolation valve is basically has a requirement for the leak level. Relatively speaking, the safety requirements are higher than that of the on/off valve, and some parts have higher requirements.
The screw threads of NRS gate valve lift the gate are exposed to fluid being controlled by the valve. This can cause problems if the fluids tend to foul the threads. So the non risint stem gate valve are usually on the clean liquid or gases.Rising stem gate valve have the threads external to the valve.
