304/316L Stainless Steel Sanitary Check Valve Welded End. Our Check Valves are designed to prevent reverse flow.Concentric and eccentric styles as well as our tapered disk design are available for horizontal,vertical applications and are working well without leaking while getting a returnpressure.Our special designed Check valve can be using for many applications in such as food, dairy, beverage,pharmaceutical, chemical, and many other industries - Wenzhou Qili Fluid Equipment Co.,ltd.