Thank you for visiting TONGJIE Website. If you have any questions about our products and service, please kindly fill out the following form and we will contact you shortly. ...................................................................................................................................................................................................................... ◎SANITARY FITTING & VALVES Type：NO RETURN VALVE(CHECK VALVE) Description 1.Body & Stem & Disk: 304,316,316L full precision machined. 2.Spring: Stainless steel material 3.O-Ring : EPDM , Silocone, Viton , PTFE as required 4.Pressure: Max work 10 bar 5.Available for using on food, Pharmaceutical , I.C. industry, Cosmetic, Wine, Beverage, Dairy . 6.Connection End: per 3A, BS, SMS , DIN Welded , Clamp End.