Of iron or steel
Taps, cocks, valves and similar appliances, for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves; parts thereof: > Check (nonreturn) valves: > Of iron or steel
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Subheadings
Products classified 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.
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.
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.
Cast Iron Foot Check Valve
Submersible cast iron foot check valve with strainer for well pumps and sump systems, preventing sediment entry while blocking backflow. Classified HTS 8481.30.20 as iron check valve.
Duplex Stainless Steel Check Valve
Duplex stainless steel (2205) check valve for seawater desalination plants and offshore platforms, combining strength and corrosion resistance. HTS 8481.30.20 as steel alloy check (nonreturn) valve.
Steel Spring-Loaded Check Valve
Adjustable cracking pressure steel spring-loaded check valve for accumulator charging circuits and hydraulic reservoirs. HTS 8481.30.20 for iron/steel nonreturn valves.
Large Diameter Steel Tilting Disc Check Valve
48-inch steel tilting disc check valve for hydroelectric penstocks and large cooling water mains, minimizing head loss with 70-degree disc travel. HTS 8481.30.20 for industrial-scale iron/steel check valves.
Steel Swing Check Valve
A swing check valve made of cast steel prevents backflow in piping systems by allowing fluid to flow in one direction only, with a hinged disc that swings open under forward pressure. Classified under HTS 8481.30.20 as a check (nonreturn) valve of iron or steel, used in industrial pipelines, water systems, and boiler applications.
Cast Iron Flap Check Valve
Cast iron flap check valve designed for wastewater and sewage lines, featuring a flap mechanism that closes to prevent reverse flow in gravity systems. Falls under HTS 8481.30.20 for check (nonreturn) valves of iron or steel due to its material and function in preventing backflow.
Ductile Iron Dual Plate Check Valve
Compact dual plate check valve made from ductile iron for HVAC and water distribution systems, minimizing water hammer with two spring-loaded plates. Classified in HTS 8481.30.20 as a steel/iron check valve for backflow prevention.
Carbon Steel Lift Check Valve
Carbon steel lift check valve for steam and hot water lines, featuring a vertically lifting disc to prevent reverse flow in boiler feed systems. HTS 8481.30.20 covers this iron/steel nonreturn valve design.