stainless steel actuator threaded Acting piston valve

1.Large Flux, low Resistance, No Water-hammer Y-type Shape Enlarged The Flowing Section, which Could Raise The Flux By 30% And Make Flow More Smooth
2.Super Long Life.
3.Which Help The Stem Adjust And Lubricate Itself Automatically.
4.The Cylinder Material is Stainless Steel.Lubricating Automatically,360 Rolling Freely.