Threaded Steel Check Valve
NPT threaded steel check valve for instrumentation and small bore tubing in process control systems. HTS 8481.30.20 for miniature iron/steel check valves.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered tube fittings
Compression fittings without valve function classify differently.
If for laboratory instruments
Lab apparatus valves go to instruments chapter.
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Import Tips & Compliance
• Thread form (NPT, BSP) gauge certifications
• Bubble-tight leak rate test results
• Instrumentation valves may need SIL ratings
Related Products under HTS 8481.30.20
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Stainless steel ball check valve uses a ball and spring to block backflow in high-pressure hydraulic systems and chemical processing lines. HTS 8481.30.20 applies as it's a nonreturn valve constructed primarily of steel alloys.
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Forged steel Y-pattern check valve for oil & gas pipelines, offering angled flow path for reduced pressure drop in high-velocity applications. Falls under HTS 8481.30.20 as iron/steel check (nonreturn) valve.
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Spring-assisted steel silent check valve eliminates slamming and water hammer in pump discharge lines through cushioned closure. HTS 8481.30.20 for iron/steel nonreturn valves used in municipal water systems.
Cast Steel Piston Check Valve
Heavy-duty cast steel piston check valve for power plant cooling water recirculation, with guided piston for reliable sealing. Classified HTS 8481.30.20 as steel check (nonreturn) valve.
Iron Wafer Check Valve
Space-saving iron wafer check valve sandwiched between flanges for tight piping installations in HVAC systems. HTS 8481.30.20 applies to this iron check (nonreturn) valve design.
Steel Horizontal Inline Check Valve
Horizontal inline steel check valve for compressed air mains and irrigation systems, maintaining full pipe flow alignment. Under HTS 8481.30.20 as iron/steel nonreturn valve.