Chinese Pneumatic Knife Gate Valve (Model: PZ673PU) for Sewage and Sand Treatment - Polyurethane Material, Wear-resistant and Zero-leakage Valve

Product Description
PZ673H-10CP Pneumatic Blade Gate Valve: An Efficient Solution for High-Viscosity Slurry Transportation

The PZ673H-10CP pneumatic blade gate valve (also known as pneumatic plug valve or slurry-specific valve) features a stainless steel and cast steel composite structure, combined with a pneumatic drive system and sharp blade-type valve plate. It is specifically designed for high-viscosity and particle-containing slurry transportation in DN80 and DN200 specification pipelines. It combines the characteristics of wear resistance, anti-blockage, and rapid opening and closing. It is widely applicable to harsh working conditions such as municipal sewage, mine tailings, and papermaking pulp, and is the core valve equipment for solving the problems of "blockage and leakage" in slurry transportation.

The valve body is made of stainless steel + cast steel composite material, providing dual guarantees of corrosion resistance and wear resistance. The main body is cast from high-quality cast steel (WCB) to ensure structural strength under high-pressure conditions; key contact parts such as the valve plate and sealing surface use 304 or 316L stainless steel, which can resist acid-base slurry corrosion and hard particle erosion, and the service life is more than three times that of ordinary carbon steel valves.

The blade-type valve plate design enables smoother opening and closing to prevent blockage. The valve plate adopts a wedge-shaped blade structure, which can cut through fibers, flocculent impurities, or high-viscosity slurry in the pipeline during opening and closing, fundamentally avoiding the opening and closing failures caused by material entanglement and clogging in traditional gate valves. At the same time, the valve plate and valve seat adopt a dual combination of soft seal + hard seal, ensuring the sealing performance under low-pressure conditions and being able to withstand the long-term wear of particles in the slurry.

Pneumatic drive system, quick response and easy control. Equipped with a single-acting or double-acting pneumatic actuator with a working pressure of 0.4-0.6 MPa, it can achieve rapid opening and closing (opening and closing time for DN200 specification ≤ 5 seconds), meeting the continuous transportation requirements of the production line. It supports the connection of remote PLC/DCS control systems and can be paired with a manual operating mechanism. In case of air source failure, it can be manually opened and closed for emergency use, balancing automation and safety.

Compatible with DN80/DN200 specifications, easy installation and maintenance. The design is optimized for common pipeline specifications such as DN80 (3 inches) and DN200 (8 inches). The connection method supports flange connection, complying with standards such as GB/T 9113 and ANSI B16.5, and can directly replace existing pipeline valves. The valve body adopts a split structure, and the wear-prone components such as seals and valve plates can be disassembled and replaced separately without the need to remove the entire valve, significantly reducing maintenance time and costs.

• Municipal Environmental Protection: Sludge transportation in sewage treatment plants, control of slurry after grating machines, can cut off flocculent sludge from impurities;
• Mining Metallurgy: Opening and closing of tailings slurry and slag slurry transportation pipelines, resistant to high-concentration particle wear;
• Papermaking and Chemicals: Transportation of high-viscosity fluids such as pulp, starch slurry, and coatings, preventing fibers from entangling valve plates;
• Food Processing: Transportation of viscous materials such as jam and syrup, stainless steel material conforms to food hygiene standards (food-grade sealing components need to be selected).

Manufactured in accordance with standards such as GB/T 13927 and API 600, the PZ673H-10CP pneumatic knife-type gate valve, with the core advantages of "anti-blocking, corrosion resistance, and easy maintenance", provides stable and efficient opening and closing control solutions for various high-viscosity slurry transportation systems.

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