Steel Silent Check Valve
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.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If integral to centrifugal pumps
Pump-mounted check valves classify as pump parts.
If with integrated safety relief
Safety valves take precedence over check function.
If bulk sanitary ware valves
Bathroom fixture valves go to sanitary ware chapter.
Not sure which classification is right?
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Import Tips & Compliance
• Provide spring tension and closure speed test data
• AWWA C508 compliance for potable water applications
• Misclassification risk with pump relief valves under 8413
Related Products under HTS 8481.30.20
Stainless Steel Ball Check Valve
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.
Forged Steel Y-Type Check Valve
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.
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.
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.