Three-piece slurry valve ZSK743Y

Valves of this type should generally be installed horizontally in piping systems.

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Keyword: Three-piece slurry valve ZSK743Y

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Medium- and High-Voltage Series

Three-piece slurry valve

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When a gate valve is closed, the sealing surfaces rely solely on the pressure of the medium to achieve a seal—specifically, the sealing surface of the gate is pressed against the valve seat on the opposite side by the medium’s pressure, thereby ensuring a tight seal. This type of sealing is known as self-sealing. By contrast, most gate valves employ forced sealing: when the valve is closed, an external force is used to press the gate against the valve seat, guaranteeing the sealing performance of the sealing surfaces. Such valves should be installed vertically in the pipeline.

Performance

1. The valve can be locally and remotely controlled according to user requirements, and can also provide remote and centralized display.

2. Lightweight: The valve body is made of carbon steel, making it approximately 20%–30% lighter than conventional gate valves, which facilitates installation and maintenance.

3. Using this type of valve can enhance the sealing performance of pipeline systems, minimizing leaks to the greatest extent possible, thereby playing a positive role in improving production efficiency and protecting the environment.

4. The sealing surface is designed with a highly wear-resistant and corrosion-resistant ceramic composite material, using an inlaid technology. This results in superior corrosion resistance and excellent wear resistance, significantly extending the service life of China’s valves and increasing their cost-effectiveness by a factor of 10 compared to conventional valves.

Three-piece slurry valve

ZSK743Y-25C

■ Product Overview

The slurry valve gets its name from its application in mining operations. It consists of a three-piece assembly, comprising a cast valve body and two flanges welded together. It features hardmetal sealing surfaces and stainless steel gate plates. Its core components are the gate and the left and right sealing plates, which together form a three-plate dynamic sealing assembly. Make it All wear parts are concentrated on the left and right sealing plates. Up. It features a reasonable structure, convenient operation, quick opening, excellent wear resistance and corrosion resistance, long service life, high interchangeability, easy assembly, low maintenance costs, high economic benefits, reliable sealing, and avoids... The “gnawing circle” phenomenon and other similar characteristics make this valve ideal for use as a shut-off device in slurry conveying pipelines across industries such as mining, metallurgy, coal, chemical processing, and power plants. It is currently the preferred valve of choice for domestic slurry conveying systems.

■ Working principle ：

Valve Operation: The valve is opened and closed by controlling the up-and-down movement of the gate plate via a lifting and lowering actuator. When the valve is open, the gate plate rises, creating a fully open flow path through the pipeline, allowing the medium to pass smoothly. When the valve is closed, the gate plate descends and tightly contacts the sealing surface, achieving a secure seal.

■ Sealing Principle: A sealing ring assembly, comprising a first sealing ring and a second sealing ring, is fitted between the valve seat and the gate. The sealing is achieved through the tight fit between the sealing rings and the sealing surfaces. The valve body is fitted with an expandable rubber seal ring that contracts when the valve is opened and expands when the valve is closed, pressing tightly against the valve disc to ensure a secure seal.

■ Performance Features ：

• Excellent sealing performance: The unique sealing structure design effectively prevents medium leakage, and the sealing gap is easy to adjust, ensuring no leaks, drips, or emissions.

• Wear and corrosion resistance: The selection of hard alloy sealing surfaces and stainless steel gate plates ensures excellent wear resistance and corrosion resistance, resulting in a long service life.

• Easy operation: With a reasonable structure and flexible operation, it supports multiple operating modes including manual, electric, and pneumatic.

•Easy maintenance: Wear-and-tear parts are concentrated on the left and right sealing plates. When replacing parts, simply remove the left and right valve plates, making maintenance and replacement convenient.

• Full-bore design: When the valve is open, there are no obstructions in the flow path, ensuring smooth media flow and preventing issues such as deposition or blockage.

Valve Basic Parameters
Main material: Q355B、 WCB 、CF8、CF3M、4A、5A	Nominal diameter: DN50-1200mm、 NPS 2"-20"
Gate material: 201、304、2205、2507、C276	Nominal pressure: 0.6MPa-2.5MPa、150Lb
Valve seat material: STL 、 TC 、 CF 、 PU 、 EPDM Custom-made and specially tailored	Leakage rate: Hard seal D Level 、 Soft seal A Level (Zero Leakage) )
Drive configurations: hydraulic, electro-hydraulic, electric actuator, bevel gear, pneumatic, and others.	Operating Condition Recommendation: Mining, Metallurgy
Applicable temperature: -38 Celsius ~+425 Celsius The specific temperature range depends on the material of the sealing pair and the properties of the medium. For details on other parameters, please consult our company.

Valve installation is shown in the diagram.

Schematic diagram of required accessories for installation:

For blind hole installation, use the matching component: short external hexagonal bolt. *n Hexagon nut *n Flat washer or spring washer *n
Through-hole installation using matching components: long external hexagonal bolt *n Hexagon nut *n Flat washer or spring washer *n
Metal-wound gasket or rubber gasket *2 Each valve per piece
Torque wrench *2

Note: n the number of = For the number of bolt holes and bolt lengths, please consult our technical staff.