Albion Wafer Spring Check Valve PN 16/40 ART 964 The Albion ART 964 quick opening and pinch style check valve. The valve is suitable for PN10, 16, 40 & ansi 150, 300 Flanges. The Valve is used to close off and protect pipe lines and vessels from potentially dangerous damage due to back pressure. The positively locking metal seat assembly ensures that the valve stays closed under reversing flow conditions. Summary: - Wafer Pattern to suit PN10,16,40 & ANSI 150, 300 Flanges - Metal Seat - PN40 Rated