Disc Disc check valve DN 15-100 - 931 | AWS Disc check valve DN 15-100 - 931 | AWS The Disc Check Valve DN 15-100 - 931 | AWS is designed for classical applications in plumbing, heating, and air conditioning systems, as well as straightforward industrial applications. This valve ensures efficient flow control and prevents backflow, making it suitable for a variety of settings. View Flanged (Wafer) PN 6 PN 10 PN 16 150 lbs DIN ANSI 2.0402 (CW617N Brass)