A batch order of DN1100 flap blind plate valves has finished manufacturing, pressure testing and pre-delivery commissioning. Twelve units are fully loaded onto the flatbed truck and dispatched to the client for flue gas pipeline engineering project.

This type of flap blind plate valve is constructed with Q355NE high-strength low-alloy steel as the main body material. It is rated for 0.1 MPa nominal pressure, designed for flue gas medium, and supports continuous operating temperature up to 250°C. It is widely adopted in metallurgy, coking, coal chemical, thermal power flue gas pipelines for positive isolation and shut-off service. The flap blind plate valve creates absolute mechanical isolation by inserting the blind plate into the pipeline, achieving bubble-tight shut-off. It serves as critical safety equipment for pipeline maintenance and isolation. Compared with ordinary butterfly valves, it delivers superior sealing performance and eliminates gas leakage risks, protecting field workers during pipeline overhaul work.

During the factory quality inspection stage, every single valve undergoes independent hydrostatic shell test and seat sealing test. All test results meet the design requirements and international industrial standards. Each valve is equipped with a dedicated electric control cabinet matched with the electric actuator. The electric actuator supports both local on-site operation and remote control via DCS system. Before shipment, our technical engineers carry out full-cycle commissioning for each unit, calibrating travel switches, limit positions, opening and closing feedback signals, interlock functions and motor protection parameters. Thorough pre-commissioning greatly reduces on-site adjustment work after arrival, shortens your installation cycle and avoids unexpected commissioning troubles on site.

For overseas long-distance transportation, every valve is fixed inside a heavy-duty galvanized steel frame crate. The outer layer is wrapped with waterproof tarpaulin and safety netting to prevent collision damage, scratch on flange sealing faces, paint peeling and moisture contamination during transit. This packaging method is optimized for sea freight and overland trucking, ensuring the actuator, sealing surface and valve body arrive intact at the destination port.

Flue gas service is one of the most demanding working conditions for industrial valves. The flue gas stream usually carries dust particles, suffers frequent temperature fluctuation and thermal cycling. These factors require valve material with excellent toughness, temperature resistance and structural stability. Q355NE is normalized low-alloy structural steel specified under GB/T 1591-2018. It features outstanding low-temperature impact toughness, reliable weldability and stable mechanical performance under moderate high temperature. It resists thermal fatigue and deformation under cyclic flue gas conditions, effectively extending the service life of blind plate valves in flue gas duct systems.

We support custom manufacturing of flap blind plate valves in different DN sizes, pressure classes and material options. Drive configurations include electric actuator, hydraulic drive and manual operation to match different automation requirements of flue gas, gas and air piping systems. Our valve products are supplied for global B2B industrial projects covering metallurgy, energy, chemical processing and waste heat recovery ductwork.

Our factory maintains a complete quality control workflow including raw material incoming inspection, machining dimensional check, welding non-destructive testing, pressure tightness test, actuator matching and functional commissioning. Every test record is archived for traceability. We strictly control each production and testing procedure to guarantee consistent quality for every shipment. As a professional industrial valve manufacturer, we focus on positive isolation valves for hazardous gas and flue gas lines. We keep optimizing design, material selection and testing standards to supply dependable pipeline isolation solutions for international engineering contractors, EPC companies and end plant operators.

Positive shut-off is the top priority for flue gas pipeline safety. Many industrial accidents are caused by unreliable isolation valves during maintenance. The flap blind plate valve provides visible mechanical blind isolation, which is the safest isolation method for combustible and toxic flue gas pipelines. For projects with strict safety specifications, blind plate valves are mandatory equipment instead of relying only on butterfly valves or gate valves.

Our engineering team can provide technical support including 2D drawings, 3D models, material test certificates, pressure test reports and operation manuals for each blind plate valve order. We can also adjust sealing material, actuator explosion-proof grade and flange standard to match ASME, DIN, GB and other international standards according to project specifications. Whether you need a small quantity spare valve or large batch bulk order for a whole flue gas treatment plant, we can arrange production schedule, testing and shipment to meet your project timeline.

This shipment of DN1100 Q355NE blind plate valves marks another successful delivery record for our flue gas valve series. We will keep upholding strict quality standards, improve packaging and logistics arrangement for export cargo, and provide responsive after-sales technical guidance for overseas clients. Our goal is to become a trusted long-term supplier of heavy-duty isolation valves for global industrial piping systems. If you have inquiries about flap blind plate valves, flue gas isolation valves or other industrial pipeline valves, welcome to contact our sales and engineering team for quotation and technical consultation.