Knife Edge Gate Valve » Knife Edge Gate Valve » Sleeved Knife Edge Gate Valve Knife Edge Gate valve Application Range 50 NB to 600 NB Body / Port Style Wafer / Lug Rating Class 150 / 300 Fly ash slurry pump isolation Material Cast Iron & Carbon / Stainless Steel Dry fly ash discharge River water de-sanding circuit Bottom ash de-watering circuit   Sleeved Knife Edge Gate valve Application Range 50 NB to 600 NB Body / Port Style Wafer / Flange Rating Class 150 / 300s Fly ash slurry pump isolation Material Cast Iron with Rubber Sleeve Dry fly ash discharge River water de-sanding circuit Bottom ash de-watering circuit Top