YOKOGAWA K9477EA

YOKOGAWA K9477EA

1. Product Overview of YOKOGAWA K9477EA

The YOKOGAWA K9477EA is a factory-original safety flame arrestor spare part exclusively matched with Yokogawa ZR series zirconia oxygen analyzers, including ZR22G, ZR202S, ZR202G mainstream probe variants, alongside supporting auxiliary parts K9471UA dust filter, K9470BG cold junction component and E7042UD cell assembly. Installed at the gas sampling inlet of zirconia oxygen probes, this flame arrestor blocks flame backflow from furnace pipelines, avoiding explosion risks caused by flammable mixed gas entering analyzer internal chambers. Unlike generic industrial flame baffles, YOKOGAWA K9477EA adopts layered metal sintered mesh structure customized for flue gas high-temperature environments, maintaining stable gas circulation efficiency while meeting IEC 61508 safety standards. It serves as a mandatory replacement wear part for thermal power plants, petrochemical furnaces, cement kilns and waste incineration flue gas monitoring systems.

2. K9477EA Model Code Explanation

K9477: Fixed accessory serial code, dedicated spare parts group for ZR22/ZR202 oxygen sensor probes

EA: Component classification suffix, representing standard flame arrestor unit; other suffix variants include UA (dust filter), BG (RTD cold junction), BM (calibration pipe)

3. Complete Technical Parameters of YOKOGAWA K9477EA

Standard Model: YOKOGAWA K9477EA, full compatible ZR probes: ZR22G-100, ZR202S-200, ZR202G-300

Core Structure: Multi-layer 316L stainless steel sintered metal mesh flame barrier

Mesh Pore Size: 0.05mm uniform micro-pore interception layer

Maximum Working Medium Temperature: 750°C continuous flue gas exposure

Instant Heat Resistance: Short-time 900°C peak temperature tolerance

Gas Flow Rate Range: 0.2–12 L/min sampling gas flow without pressure loss

Flame Blocking Grade: Ex d IIC anti-flashback certification for flammable industrial mixed gas

Overall Dimensions: 28mm outer diameter, 36mm total length, single unit weight 45g

Connection Interface: Standard M12 thread, direct screw-in mounting for ZR probe gas inlet

Anti-Corrosion Performance: Passivated stainless steel, resistant to sulfur dioxide, nitrogen oxide flue gas corrosion

Dust Interception Auxiliary Effect: Blocks coarse ash particles to extend internal sensor service life

Environmental Operating Range: Ambient storage -40°C ~ +80°C, 5%–95% RH non-condensing

Service Cycle: Recommended 6–12 months regular replacement under heavy ash flue gas conditions

Compliance Certifications: CE, ATEX II 2G Ex d IIC T6, Yokogawa factory safety inspection certified

Material Lifespan: 5-year structural aging resistance under normal flue gas operation

4. Core Functional Advantages of YOKOGAWA K9477EA

First, the multi-layer sintered mesh of YOKOGAWA K9477EA achieves dual functions of flame isolation and coarse dust filtration, reducing the frequency of replacing front-end dust filters for ZR probes. Second, M12 unified thread interface enables tool-free quick disassembly and replacement during on-site equipment maintenance. Third, high-temperature resistant 316L stainless steel material prevents deformation or perforation under long-term kiln flue gas thermal impact, outperforming ordinary brass flame arrestors. Fourth, precise pore size design balances flame interception safety and sampling gas circulation, eliminating measurement lag caused by excessive gas flow resistance. Every YOKOGAWA K9477EA undergoes flame backflow impact testing and high-temperature aging inspection before factory packaging.

5. Industrial Application & Global Supply Support

YOKOGAWA K9477EA flame arrestor is an essential safety spare part for all facilities equipped with ZR series zirconia oxygen analyzers, covering coal-fired power boilers, oil refinery heating furnaces, cement rotary kilns and solid waste incineration flue gas oxygen monitoring. Automation maintenance teams, environmental monitoring equipment dealers and power plant spare parts warehouses keep stock of K9477EA for routine probe overhaul. All supplied YOKOGAWA K9477EA units are brand-new original with complete Yokogawa anti-static packaging, covered by a 12-month manufacturer warranty. We provide worldwide door-to-door bulk shipping for industrial environmental monitoring equipment purchasers and one-stop matching supply for full ZR series probe spare parts.