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Resilient Wedge Gate Valve OS&Y/NRS Flanged Cast Iron -Z45X | Z41X The Farpro Z45X/41X resilient wedge gate valve is a high-quality valve that is designed for use in various applications. This valve features a resilient wedge that ensures a tight seal, preventing leaks and ensuring reliable operation. The NRS (non-rising stem) design means that the stem remains stationary while the gate moves up and down, which simplifies installation and reduces maintenance requirements.