Coliter ® Cast Steel Knife Type Gate Valve – PN1.0, ≤425°C, Slurry & Slag Cutting Valve for Industrial Pipelines

PZ73H Cast Steel Knife Type Gate Valve – Compact, Single-Acting Knife Gate Valve with Sharp Edge for Abrasive Media

The Coliter® PZ73H Cast Steel Knife Type Gate Valve is a specialized industrial valve engineered for handling challenging media such as sewage, pulp, coal slurry, ash, slag, and other viscous or fibrous mixtures. Its defining feature is a sharp-edged, knife-shaped stainless steel gate that slices through solids and seals tightly against an elastomer or metal seat—preventing clogging and ensuring reliable shut-off even in high-solids applications. Constructed with a carbon steel (WCB) body and bonnet, and equipped with a stainless steel ram and stem, the valve offers excellent strength and corrosion resistance. It supports multiple sealing options: rubber (＜80°C), PTFE (＜180°C), or hard alloy (＜425°C), making it adaptable to a wide range of temperatures and chemical environments. Rated at PN1.0 MPa (Class 150), the PZ73H complies with standards JB/T 8691-1998 (design), GB/T 2221 (face-to-face), GB/T 9113.1-2000 (flange), and GB/T 13927-92 (testing). With a compact wafer-style or flanged design and low operating torque, it is widely used in wastewater treatment, mining, power plants, paper mills, and chemical industries—delivering long service life, easy maintenance, and effective cutting-sealing performance in demanding slurry pipelines.