The TIANYU Wafer Slurry Knife Gate Valve is a heavy-duty linear cut-off valve engineered to comply with globally recognized industrial valve specifications including API 594, ASME B16.34, ASME B16.5, and EU CE safety certification, fully meeting cross-border procurement standards for mining, mineral processing, municipal wastewater and solid-liquid mixing pipeline projects across North America, Europe, Southeast Asia and Australia. Classified as wafer-type knife gate valve specially optimized for slurry and solid-laden media, this product adopts thin sharp-edged stainless steel blade as the closing component, which can scrape off sediment, granular mineral particles and viscous attachments on the sealing surface during opening and closing strokes to avoid medium blockage and sealing failure caused by solid deposition. The valve is equipped with standard wafer clamped end connection structure, integrated cast valve body, replaceable elastic rubber sealing liner and vertical manual rising handwheel drive assembly, without built-in bypass pipeline or auxiliary pressure relief structure, focusing on full pipeline isolation service for slurry transportation pipelines. All dimensional indexes follow unified ASME standard sizing norms to realize interchangeability with global standard pipeline flanges, greatly simplifying on-site compact installation, routine liner replacement and internal sediment cleaning work for mining plant operation teams and international EPC engineering contractors. Every finished valve undergoes complete hydrostatic shell test and seat tightness inspection under API 598 testing rules before factory delivery, passing third-party authority performance audit to satisfy industrial tender bidding and market access requirements.
The GGG40 ductile iron valve body is produced through standardized spheroidizing annealing heat treatment after casting, with minimum tensile strength reaching 420MPa and outstanding impact resistance and anti-abrasion structural stability, effectively resisting repeated impact and abrasion of mineral solid particles in slurry medium, far superior to ordinary gray cast iron which is prone to brittle fracture under heavy particle scouring. The integrated yellow coated valve body casting structure optimizes internal flow channel outline to reduce slurry sediment dead zones, lowering solid particle accumulation probability at sealing positions during long-term pipeline operation. The core SS304 stainless steel knife blade undergoes multi-stage CNC precision cutting and edge sharpening treatment, forming thin sharp cutting edge on both sides of the plate; this sharp edge can physically strip viscous slurry and mineral deposits attached to the rubber liner surface during every opening and closing cycle, preventing solid particle embedding between sealing pairs that leads to permanent leakage failure. The replaceable full-port EPDM rubber liner is vulcanized with high-strength fiber reinforcement, possessing excellent wear resistance, tear resistance and anti-corrosion performance against neutral mineral slurry, organic sludge and wastewater media, the integral liner design enables independent disassembly and replacement without removing the whole valve from pipeline, cutting maintenance labor cost greatly. The rising carbon steel stem receives anti-rust galvanizing treatment to avoid corrosion and jamming under long-term contact with wet slurry vapor, the external rising stem structure provides real-time visual feedback of valve opening stroke without auxiliary monitoring equipment. Wafer clamped connection structure eliminates extra flange casting design of flanged knife gate valves, greatly reducing overall valve weight and occupying installation space, perfectly matching narrow pipeline trench and compact modular slurry skid layout widely adopted in mining and mineral processing factories.
