Forged Steel Knife Gate Valve KGZ73X

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

Keyword: Forged Steel Knife Gate Valve KGZ73X

Category:

Medium- and High-Voltage Series

Forged Steel Knife Gate 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.

Forged Steel Knife Gate Valve

KGZ73X-63C

■ Product Overview

The forged steel knife gate valve is manufactured using a forging process, which addresses and enhances the limitation of conventional knife gate valves that cannot withstand medium- and high-pressure conditions. The valve and its key components have undergone special strengthening treatments throughout, enabling them to reliably handle various medium- and high-pressure operating conditions. Primarily used for controlling fluids containing solid particles, fibers, or viscosity. And easily crystallized Fluid of the medium.

■ Structural characteristics

The product valve seat is thermally pressed from pure imported natural rubber. Type ， Sealed and wear-resistant Excellent performance.
The rubber core inlaid with a double-layer elastic metal ring can significantly... Improve Rubber's resistance to Pressure Sexual and resilient sealing performance.
The symmetrical dual-rubber valve seat design forms a seal within the valve cavity. Comprehensive The package effectively prevents media from entering the valve cavity, thereby avoiding issues such as difficult switching and sticking.
The valve cavity flow path adopts a straight-through design, creating a flow path that prevents residue accumulation, leaves no residue behind, and avoids jamming of debris. This design is particularly well-suited for applications involving media containing dust, solid particles, gas-liquid mixtures, or substances prone to crystallization.
Two sets of whistle ports each on the upper and lower parts of the valve body, and the lower... Fang Zeng She The ash discharge inspection port allows for continuous online cleaning of the valve cavity and maintenance operations at all times.
All valve components are assembled using standard parts, which can be maintained or replaced individually.

Valve Basic Parameters
Main material: Q355B、 WCB 、CF8、CF3M、4A、5A	Nominal diameter: DN50-700mm
Gate material: 201、304、2205、2507、C276	Nominal pressure: 4.0MPa-6.3 MPa 、150Lb-600lb
Valve seat material: EPDM 、 FKM	Leakage rate: Soft sealing A Level (Zero Leakage) )
Drive configurations: hydraulic, electro-hydraulic, electric actuator, bevel gear, pneumatic, and others.	Operating Condition Recommendations: Mining, Metallurgy, Petroleum, Chemical Industry
Applicable temperature: -38 Celsius ~+200 Celsius The specific temperature range depends on the materials of the sealing pair and the properties of the medium. For details on other parameters, please consult our company.

■ Sealing principle

1. Opening the valve: When the valve is opened by rotating it counterclockwise, the valve seat rubber, influenced by the internal elastic steel ring and its own elasticity, gradually closes in sync with the rising valve disc, thereby sealing the valve seat. Block The medium will not flow into the valve cavity. When the valve is fully open, the valve disc completely separates from the valve seat rubber and retracts into the valve cavity, thereby ensuring that the valve body’s flow path achieves a fully sealed condition and preventing the medium from leaking into the valve cavity.

2. Close the valve: When the valve is closed by rotating it clockwise, as the gate moves... Double-blade cross-section Passing through the rubber valve seat, pressure is applied to the rubber, causing it to deform synchronously as the valve disc gradually closes. Squeeze The valve seat rubber ensures that, when the valve is fully closed, the valve disc makes complete contact with the valve seat rubber, thereby guaranteeing a fully sealed flow path within the valve body. And Prevent media streaming leakage and negative-pressure backflow, among other issues.

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.