Chapter 84 is the core chapter in HS classification covering machinery, mechanical appliances and their parts, including power machinery, pumps, compressors, valves, bearings, transmissions, etc. Most goods in this chapter are industrial basic components, widely used in manufacturing, energy, chemical and other fields. Classification within the chapter follows the principle of function priority, while also considering characteristics such as power source and working principle. Hydraulic valves, as fluid control components, belong to the valve category of goods in this chapter. Heading 8481 covers valves, cocks, taps and similar appliances for pipes, boilers, tanks, vats and similar containers, including pressure reducing valves, check valves, safety valves, relief valves, etc. This heading includes both manually operated valves and automatically controlled valves, but excludes specialized valves inside machines (such as engine intake and exhaust valves). Hydraulic valves, as components in hydraulic systems that control fluid direction, pressure and flow, meet the definition of this heading. Code 848120 is a six-digit subheading: the first 2 digits 84 represent Chapter 84 (machinery); digits 3-4, 81, represent heading 8481 (valves and similar appliances); digits 5-6, 20, represent subheading 848120, specifically referring to hydraulic valves. Hydraulic valves are control components used in hydraulic transmission systems, regulating pressure, flow and direction by changing the cross-sectional area or direction of fluid passages. Subheading 848120 further covers various hydraulic valves, such as directional control valves, pressure control valves, flow control valves, etc., but does not include specialized valves of other headings. Hydraulic valves are classified under 848120 because they are valves used in hydraulic systems, meeting the valve definition of heading 8481, and the subheading explicitly specifies hydraulic valves. Adjacent codes such as 848110 (pressure reducing valves) may be used in hydraulic systems, but 848120 specifically refers to hydraulic valves, covering a broader range of hydraulic control valves. If it is a pneumatic valve, is it classified under 848120? In fact, pneumatic valves are usually classified under 848120? Note: 848120 refers only to hydraulic valves; pneumatic valves are generally classified under 848190 or 848120? According to HS notes, 848120 includes hydraulic valves; pneumatic valves are generally classified under 848120? In fact, pneumatic valves also belong to 8481, but subheading 848120 explicitly refers to hydraulic valves; pneumatic valves may be classified under 848190 (other). Therefore, the key distinction between hydraulic valves and pneumatic valves lies in the power medium.

Product Name: The specific name of the declared commodity, such as "hydraulic valve", "hydraulic directional valve", etc., which must be consistent with the actual product. Brand: Fill in the manufacturer or brand name; if there is no brand, fill in "no brand". Model: Fill in the product model number to identify specific specifications. Use: Describe the application scenario of the valve, such as "used in hydraulic systems of construction machinery". Working Principle: Briefly describe the working method of the valve, such as "valve spool movement controlled by solenoid". Material: Fill in the main material of the valve body, such as "cast iron", "stainless steel". Solenoid: Indicate whether it is solenoid-driven, such as "solenoid directional valve". Product Name: Hydraulic directional valve; Brand: Rexroth; Model: 4WE6D; Use: Used in excavator hydraulic systems; Working Principle: Solenoid controlled, changing oil circuit direction; Material: Cast iron; Solenoid: Yes. Mistakenly declaring a hydraulic valve as a pneumatic valve, leading to classification errors. Use description is too general to determine whether it is used in a hydraulic system. Ignoring brand and model, affecting customs valuation and classification.

Core basis for classification: 1. Whether the commodity is a valve; 2. Whether it is used in a hydraulic system; 3. Whether it meets the description of heading 8481. Hydraulic valves achieve the action of actuators by controlling the pressure, flow and direction of hydraulic oil, and are hydraulic transmission components. According to HS notes, 848120 includes hydraulic valves, but does not include pneumatic valves and manual valves (unless used in hydraulic systems). Classification requires consideration of working principle, use and structure. 848110 Pressure reducing valves: Pressure reducing valves are used to regulate pressure and may be used in hydraulic systems, but 848120 specifically refers to hydraulic valves, covering all hydraulic control valves, while 848110 refers only to pressure reducing valves, not limited to hydraulic. 848130 Check valves: Check valves are used to prevent backflow of fluid and may be used in hydraulic systems, but 848120 is the general term for hydraulic valves; if a check valve is specifically used in hydraulic systems, it should be classified under 848120. 848140 Safety valves or relief valves: Safety valves are used for overpressure protection and may be used in hydraulic systems, but if specifically for hydraulic systems, they should be classified under 848120. 848190 Other valve parts: 848190 is for valve parts, while 848120 is for complete hydraulic valves; if it is a valve part, it should be classified under 848190. Is it used in a hydraulic system? Is it a complete valve? Is it driven by hydraulic oil? Does it have the function of controlling pressure, flow or direction? Are pneumatic and manual valves excluded?

How are hydraulic valves and pneumatic valves distinguished in HS codes? Hydraulic valves are classified under 848120, while pneumatic valves are generally classified under 848190 (other valves), because 848120 explicitly refers to hydraulic valves. The key distinction lies in the power medium: hydraulic valves use hydraulic oil, pneumatic valves use compressed air. When declaring, the working principle and medium must be specified. What are the declaration elements for hydraulic valves? The main declaration elements include: product name, brand, model, use, working principle, material, solenoid, etc. Ensure consistency with the actual product and avoid general descriptions. What is the core basis for classifying hydraulic valves? The core basis is whether the commodity is used in a hydraulic system and whether it is a valve. Reference should be made to HS notes and classification decisions to ensure compliance with the description of 848120. How are hydraulic valves distinguished from pressure reducing valves (848110)? Pressure reducing valves are a type of valve used to regulate pressure and may be used in hydraulic systems. However, 848120 is the general term for hydraulic valves, covering all hydraulic control valves. If a pressure reducing valve is specifically used in a hydraulic system, it should be classified under 848120; if it is a general pressure reducing valve, it should be classified under 848110. How to check the tax rate for hydraulic valves? The tax rate must be checked according to the customs tariff of the destination country, through the customs official website or professional databases. Note that tax rates may change; it is recommended to refer to the latest tariff. Which code should hydraulic valve parts be classified under? Hydraulic valve parts should be classified under 848190, not 848120. 848120 only includes complete hydraulic valves. How should solenoid hydraulic valves be declared? Solenoid hydraulic valves are a type of hydraulic valve and are classified under 848120. When declaring, specify "solenoid" and "hydraulic", and provide brand, model, etc. Is the classification of hydraulic valves affected by brand? Brand does not affect classification but affects valuation. Classification is mainly based on function, principle and use.