Knife Gate Valve

Jiangteng is a specialized manufacturer capable of designing and supplying customized knife gate valves. These valves feature high-efficiency sealing and strong adaptability, support intelligent control, and are suitable for complex operating conditions involving high temperatures, corrosion, and high pressure differentials.

How does a knife gate valve work for your system?

Acting as a smart valve for flue gas pipelines, the knife gate valve is installed upstream and downstream of critical equipment , such as desulfurization, denitrification, and dust removal systems , to provide safe isolation, flow regulation, and system protection.

In simple terms, it operates via a robust blade that rotates within the flue:

● For unobstructed flow: The blade aligns parallel to the gas stream, minimizing resistance and allowing flue gas to pass smoothly.

● For shut-off: The blade rotates 90 degrees to seal tightly against a specialized sealing system, completely isolating the flue gas.

● For flow regulation: The blade's opening angle can be precisely controlled , much like a water tap , to adjust flue gas flow and optimize downstream processing efficiency.

Jiangteng Technical Upgrades

1. Rapid Actuation Response: Our pneumatic knife gate valve actuators enable emergency closure in as little as 5 seconds, while electric models offer precision and reliability.

2. Reliable Sealing: Hard seals provide wear and high-temperature resistance, while soft seals offer enduring elasticity; an optional air-purge sealing system is available to achieve zero-leakage performance via an air curtain.

3. Robust and Durable Structure: Optimized using Finite Element Analysis (FEA), the design features a fully welded box-frame structure that resists seismic forces and deformation, with a design service life exceeding 15 years.

Key Product Features

1. Zero Leakage

The knife gate valve employs multi-layer sealing technology to completely prevent flue gas leakage, ensuring personnel safety during maintenance and reliable system isolation.

2. Long Service Life

Designed to withstand harsh operating conditions , including high temperatures (up to 1200°C) and highly corrosive media (such as SO₂ and NOx) , the valve utilizes specialized alloys and coating technologies to ensure stable, long-term operation.

3. Intelligent Control

Seamlessly integrates with your DCS/PLC systems, supporting remote operation, real-time status feedback, and fault early warning to enable precise, unmanned management.

4. Customized Design

Jiangteng offers comprehensive customization , covering materials, dimensions, actuation methods, and sealing classes , to perfectly match your specific piping and operating conditions.

Product Specifications

For Which Industries Are Knife Gate Valves Suitable?

Power Generation: Ensures isolation for maintenance in desulfurization and denitrification systems, enables rapid switching during boiler start-up and shutdown, and supports ultra-low emission upgrades.

Iron and Steel: Withstands high-temperature, high-dust flue gases from blast furnaces and converters; offers reliable sealing to prevent unplanned downtime.

Chemical Processing and Waste Incineration: Utilizes high-grade corrosion-resistant alloys and sealing materials to handle complex media , such as acidic gases and dioxins , ensuring safety for personnel and the environment.

Cement and Ceramics: Features specialized designs to handle high dust levels and the risk of material buildup; offers extended maintenance intervals, reducing the frequency and cost of cleaning.

FAQ

Q: How do I determine which sealing method I need?

A: Hard sealing offers superior wear and high-temperature resistance, making it suitable for applications involving high dust content and elevated temperatures.

Soft sealing provides excellent elasticity and zero leakage, making it ideal for environments requiring stringent sealing performance or handling highly corrosive flue gas.

Our engineers will recommend the optimal configuration based on your specific media and operating conditions.

Q: What is the service life of the knife gate valve?

A: The core structure is designed for a service life of over 15 years. We utilize a modular design that allows for easy replacement of wear parts, such as seals and bearings.

Clear maintenance guidelines are provided with the equipment; routine inspections every 6–12 months help minimize long-term O&M costs.

Q: How are installation and after-sales support handled?

A: Jiangteng products are exported to over 30 countries worldwide. We provide English-language drawings, installation videos, and remote online guidance, alongside service partners in key regions to ensure rapid response. We maintain ample spare parts inventory and support global logistics.

Q: How long does it take to manufacture a custom non-standard knife gate valve?

A: The standard lead time for customization is approximately 20–30 working days. We operate flexible production lines and can initiate an expedited process for urgent orders to fully accommodate your project schedule.

Contact Jiangteng Today

Partner with us and benefit from:

✔ One-on-one operational analysis: Our technical team provides free consultation on model selection and solution design.

✔ End-to-end quality tracking: Strict quality inspections at every stage, from material intake to final factory testing, with inspection reports included.

✔ Installation guidance and training: Detailed installation manuals provided, along with on-site or remote commissioning support.

✔ Long-term service support: 24-hour technical consultation and lifetime availability of spare parts and maintenance services.