8" Cast Iron Knife Gate Valve – Unidirectional – Double Acting Actuator VS 9987This 8" Cast Iron Knife Gate Valve offers unidirectional flow and utilises a double acting actuator for precise control. Its durable cast iron construction ensures long lasting performance and its versatile design makes it suitable for a variety of industrial applications. Lugged and Tapped to suit PN16, (8 also available PN10 on request) Cast Iron Body Stainless Steel Blade EPDM Seat Double Acting Actuator. PN10 Rated, Temperature 20C to 110C