- Conform to TAPPI TIS 405.8 face-to-face.
- Tested to MSS SP-81.
- Full Port.
- Full lug body drilled and tapped to ASME Class 150.
- Bi-Directional shut-off resilient seated design.
- Viton® and EPDM seats available.
MSS SP-81 applies to bonnetless metal seated knife gate valves, 2"" to 24"" size, 150 psi CWP. Sizes above 24"" are not covered under this standard. Additionally, resilient seated knife gate valves and slide knife gate valves are also not covered under MSS SP-81. These products are subject to the individual manufacturer's internal testing and design standard.