Chapter 84 is one of the broadest chapters in the HS classification, covering various machines, mechanical appliances, boilers, engines, pumps, compressors, fans, air conditioning equipment, filtering devices, valves, bearings, transmission devices, etc. The core characteristic of this chapter is that goods must have mechanical movement or energy conversion functions, and usually do not involve electrical control parts (electrical parts are classified under Chapter 85). As a fluid control element, a pressure reducing valve adjusts pressure through a mechanical structure, making it a typical mechanical appliance, and therefore it is classified under this chapter. Heading 8481 covers valves, cocks, taps and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure reducing valves, throttling valves, check valves, safety valves, relief valves, gate valves, ball valves, butterfly valves, etc. This heading includes not only manual valves but also automatically regulated valves, but note: if a valve has an electrical drive device (such as a solenoid valve), its electrical part may be classified under Chapter 85, but the whole is still classified as a valve. Valves under this heading are mainly used to control the flow of fluids (liquid or gas). Code 848110 is a six-digit subheading. The first 2 digits "84" represent Chapter 84 (nuclear reactors, boilers, machinery, mechanical appliances and parts thereof), indicating that the goods belong to the machinery category. Digits 3-4 "81" represent heading 8481 (valves, cocks, taps and similar appliances), clarifying that the goods are fluid control devices. Digits 5-6 "10" represent subheading 848110, specifically referring to pressure reducing valves. A pressure reducing valve is a valve that reduces inlet pressure to a set outlet pressure and maintains it stable by automatically adjusting the valve opening. Its core function is pressure reduction and stabilization, which distinguishes it from a stop valve that only controls on/off or a check valve that only prevents backflow. There may be further subdivided third-level subheadings under this subheading (such as 84811010, etc.), but the six-digit code is sufficient for international use. Pressure reducing valves are classified under 848110 because their core function is automatic pressure regulation, making them valve-type goods. The difference from the adjacent code 848120 (valves for oleohydraulic or pneumatic transmissions) is that 848120 is dedicated to hydraulic or pneumatic transmission systems, while pressure reducing valves can be used in various piping systems such as water supply, steam, and gas. 848130 (check valves) only prevents fluid backflow and does not have a pressure reducing function. 848140 (safety valves or relief valves) releases pressure when overpressure occurs, while pressure reducing valves actively regulate outlet pressure. Therefore, the functional characteristics of pressure reducing valves determine their classification under 848110.
Chapter
Chapter 84 is one of the broadest chapters in the HS classification, covering various machines, mechanical appliances, boilers, engines, pumps, compressors, fans, air conditioning equipment, filtering devices, valves, bearings, transmission devices, etc. The core characteristic of this chapter is that goods must have mechanical movement or energy conversion functions, and usually do not involve electrical control parts (electrical parts are classified under Chapter 85). As a fluid control element, a pressure reducing valve adjusts pressure through a mechanical structure, making it a typical mechanical appliance, and therefore it is classified under this chapter.
Heading
Heading 8481 covers valves, cocks, taps and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure reducing valves, throttling valves, check valves, safety valves, relief valves, gate valves, ball valves, butterfly valves, etc. This heading includes not only manual valves but also automatically regulated valves, but note: if a valve has an electrical drive device (such as a solenoid valve), its electrical part may be classified under Chapter 85, but the whole is still classified as a valve. Valves under this heading are mainly used to control the flow of fluids (liquid or gas).
Digit Breakdown
Code 848110 is a six-digit subheading. The first 2 digits "84" represent Chapter 84 (nuclear reactors, boilers, machinery, mechanical appliances and parts thereof), indicating that the goods belong to the machinery category. Digits 3-4 "81" represent heading 8481 (valves, cocks, taps and similar appliances), clarifying that the goods are fluid control devices. Digits 5-6 "10" represent subheading 848110, specifically referring to pressure reducing valves. A pressure reducing valve is a valve that reduces inlet pressure to a set outlet pressure and maintains it stable by automatically adjusting the valve opening. Its core function is pressure reduction and stabilization, which distinguishes it from a stop valve that only controls on/off or a check valve that only prevents backflow. There may be further subdivided third-level subheadings under this subheading (such as 84811010, etc.), but the six-digit code is sufficient for international use.
Classification Basis
Pressure reducing valves are classified under 848110 because their core function is automatic pressure regulation, making them valve-type goods. The difference from the adjacent code 848120 (valves for oleohydraulic or pneumatic transmissions) is that 848120 is dedicated to hydraulic or pneumatic transmission systems, while pressure reducing valves can be used in various piping systems such as water supply, steam, and gas. 848130 (check valves) only prevents fluid backflow and does not have a pressure reducing function. 848140 (safety valves or relief valves) releases pressure when overpressure occurs, while pressure reducing valves actively regulate outlet pressure. Therefore, the functional characteristics of pressure reducing valves determine their classification under 848110.
📝 Declaration Elements
Product name: The Chinese and English names of the declared goods should accurately reflect the product attributes, such as "减压阀" or "Pressure reducing valve". Use: Explain the application scenarios of the pressure reducing valve, such as for water pipes, steam pipes, gas cylinders, hydraulic systems, etc. Brand: Fill in the manufacturer or brand name; if there is no brand, fill in "no brand". Model: Fill in the specific model or specification code of the product for identification. Material: Main material of the valve body, such as brass, stainless steel, cast iron, etc. Working principle: Briefly describe the adjustment method of the pressure reducing valve, such as spring type, pilot type, diaphragm type, etc. Inlet pressure/Outlet pressure: Fill in the rated inlet pressure and set outlet pressure range, in MPa or Bar. Connection method: Such as threaded, flanged, welded, etc. Product name: Pressure reducing valve; Use: used in water supply pipes, regulating outlet pressure to 0.3MPa; Brand: XX; Model: PRV-100; Material: brass valve body, stainless steel spring; Working principle: direct-acting spring type, automatically adjusting valve opening by sensing outlet pressure through a diaphragm; Inlet pressure: 1.0MPa; Outlet pressure: 0.3MPa; Connection method: threaded connection. Confusing pressure reducing valves with safety valves; safety valves are classified under 848140, pressure reducing valves under 848110. Ignoring the description of the working principle, making it impossible for customs to determine whether it is a pressure reducing valve. Failure to provide pressure parameters may lead to doubts about functional conformity.
Product name
The Chinese and English names of the declared goods should accurately reflect the product attributes, such as "减压阀" or "Pressure reducing valve".
⚠️ Misreporting as "valve" or "pressure valve", which is too general.
Use
Explain the application scenarios of the pressure reducing valve, such as for water pipes, steam pipes, gas cylinders, hydraulic systems, etc.
⚠️ Only writing "industrial use", without specifying the medium or equipment.
Brand
Fill in the manufacturer or brand name; if there is no brand, fill in "no brand".
⚠️ Confusing brand with model, or omitting it.
Model
Fill in the specific model or specification code of the product for identification.
⚠️ Incomplete model entry or inconsistency with the actual product.
Material
Main material of the valve body, such as brass, stainless steel, cast iron, etc.
⚠️ Only writing "metal", which is not specific enough.
Working principle
Briefly describe the adjustment method of the pressure reducing valve, such as spring type, pilot type, diaphragm type, etc.
⚠️ Failure to explain the working principle, leading to classification disputes.
Inlet pressure/Outlet pressure
Fill in the rated inlet pressure and set outlet pressure range, in MPa or Bar.
⚠️ Failure to provide pressure parameters, affecting customs judgment of function.
Connection method
Such as threaded, flanged, welded, etc.
⚠️ Ignoring the connection method, though it sometimes affects classification.
Example： Product name: Pressure reducing valve; Use: used in water supply pipes, regulating outlet pressure to 0.3MPa; Brand: XX; Model: PRV-100; Material: brass valve body, stainless steel spring; Working principle: direct-acting spring type, automatically adjusting valve opening by sensing outlet pressure through a diaphragm; Inlet pressure: 1.0MPa; Outlet pressure: 0.3MPa; Connection method: threaded connection.
Common Mistakes：
Confusing pressure reducing valves with safety valves; safety valves are classified under 848140, pressure reducing valves under 848110.
Ignoring the description of the working principle, making it impossible for customs to determine whether it is a pressure reducing valve.
Failure to provide pressure parameters may lead to doubts about functional conformity.
🎯 Classification Logic
The core basis for classification is the function and structure of the goods. A pressure reducing valve must be able to automatically regulate outlet pressure and usually includes components such as a valve body, valve core, spring, diaphragm or piston. If the valve is only manually adjusted and has no pressure stabilizing function, it may be classified under 848180 (other valves). If the valve is used in a hydraulic or pneumatic transmission system, it is classified under 848120. If the valve opens to release pressure when overpressure occurs, it is classified under 848140. Therefore, when declaring, it is necessary to clarify the automatic adjustment characteristics of the pressure reducing valve and the applicable medium. 848120 Valves for oleohydraulic or pneumatic transmissions: Dedicated to hydraulic or pneumatic transmission systems, controlling fluid direction, flow or pressure, but pressure reducing valves are not limited to transmission systems and can be used for water supply, steam, etc. 848130 Check valves: Only allow fluid to flow in one direction to prevent backflow, and do not have a pressure reducing function. 848140 Safety valves or relief valves: Open to release pressure when pressure exceeds a set value, while pressure reducing valves actively reduce and stabilize outlet pressure. 848180 Other valves: Includes manual valves, solenoid valves, etc., but pressure reducing valves are listed separately because of their automatic pressure reducing function. Does the product have the function of automatically regulating outlet pressure? Is it used in a hydraulic or pneumatic transmission system? Does it only prevent backflow? Does it release pressure when overpressure occurs? Does it include an electrical control part?
Basis
The core basis for classification is the function and structure of the goods. A pressure reducing valve must be able to automatically regulate outlet pressure and usually includes components such as a valve body, valve core, spring, diaphragm or piston. If the valve is only manually adjusted and has no pressure stabilizing function, it may be classified under 848180 (other valves). If the valve is used in a hydraulic or pneumatic transmission system, it is classified under 848120. If the valve opens to release pressure when overpressure occurs, it is classified under 848140. Therefore, when declaring, it is necessary to clarify the automatic adjustment characteristics of the pressure reducing valve and the applicable medium.
Confused Codes：
848120 - Valves for oleohydraulic or pneumatic transmissions
Dedicated to hydraulic or pneumatic transmission systems, controlling fluid direction, flow or pressure, but pressure reducing valves are not limited to transmission systems and can be used for water supply, steam, etc.
848130 - Check valves
Only allow fluid to flow in one direction to prevent backflow, and do not have a pressure reducing function.
848140 - Safety valves or relief valves
Open to release pressure when pressure exceeds a set value, while pressure reducing valves actively reduce and stabilize outlet pressure.
848180 - Other valves
Includes manual valves, solenoid valves, etc., but pressure reducing valves are listed separately because of their automatic pressure reducing function.
Self-Check：
✓ Does the product have the function of automatically regulating outlet pressure?
✓ Is it used in a hydraulic or pneumatic transmission system?
✓ Does it only prevent backflow?
✓ Does it release pressure when overpressure occurs?
✓ Does it include an electrical control part?
❓ FAQ
What is the difference between a pressure reducing valve and a pressure reducer? Are the HS codes the same? Pressure reducing valves and pressure reducers usually refer to the same type of goods, but "pressure reducer" may be used in specific scenarios such as gas cylinders. If the function is the same, both are classified under 848110. However, if the pressure reducer has electrical control or measuring devices, Chapter 85 may need to be considered, but the whole is still classified as a valve. How can I check the import tariff for 848110? Tariff rates vary by country, trade agreement and country of origin. It is recommended to check the latest tariff by entering the HS code and country of origin through the official website of the General Administration of Customs of China, the International Trade Single Window, or professional query tools. In the declaration elements for a pressure reducing valve, how should the working principle be filled in? The working principle should briefly explain the adjustment method, such as "direct-acting spring type", "pilot type", "diaphragm type", etc., and mention the sensing element (such as diaphragm, piston) and adjustment method (automatic). This helps customs confirm the classification. If a pressure reducing valve is used in a hydraulic system, which code should it be classified under? If the pressure reducing valve is dedicated to a hydraulic or pneumatic transmission system, it should be classified under 848120 (valves for oleohydraulic or pneumatic transmissions). However, if it can also be used in other systems, it is still classified under 848110. Judgment should be based on actual use and design. Does a pressure reducing valve with solenoid control affect classification? If the solenoid control part only drives the valve, the whole is still classified as a valve, i.e., 848110. However, if the solenoid part has an independent function, it may need to be classified separately. It is recommended to consult a professional customs broker. How do 848110 and 848140 differ? 848110 is a pressure reducing valve, used to reduce and stabilize outlet pressure; 848140 is a safety valve or relief valve, used to release pressure when overpressure occurs. The core difference is function: pressure reducing valves actively regulate, safety valves passively release pressure. Does the material of a pressure reducing valve affect the HS code? Material usually does not affect six-digit subheading classification, but it may affect three-digit or four-digit heading classification. For example, plastic valves may be classified under 3917, but metal valves under 8481. Therefore, it is necessary to confirm whether the material is metal. How should a pressure reducing valve sold via cross-border e-commerce be declared? Cross-border e-commerce must declare according to the actual goods, providing elements such as product name, use, brand, model, etc. For small parcels, declaration may be simplified, but the HS code still needs to be accurate to avoid customs clearance problems. It is recommended to use 848110.00.00.
Q: What is the difference between a pressure reducing valve and a pressure reducer? Are the HS codes the same?
A: Pressure reducing valves and pressure reducers usually refer to the same type of goods, but "pressure reducer" may be used in specific scenarios such as gas cylinders. If the function is the same, both are classified under 848110. However, if the pressure reducer has electrical control or measuring devices, Chapter 85 may need to be considered, but the whole is still classified as a valve.
Q: How can I check the import tariff for 848110?
A: Tariff rates vary by country, trade agreement and country of origin. It is recommended to check the latest tariff by entering the HS code and country of origin through the official website of the General Administration of Customs of China, the International Trade Single Window, or professional query tools.
Q: In the declaration elements for a pressure reducing valve, how should the working principle be filled in?
A: The working principle should briefly explain the adjustment method, such as "direct-acting spring type", "pilot type", "diaphragm type", etc., and mention the sensing element (such as diaphragm, piston) and adjustment method (automatic). This helps customs confirm the classification.
Q: If a pressure reducing valve is used in a hydraulic system, which code should it be classified under?
A: If the pressure reducing valve is dedicated to a hydraulic or pneumatic transmission system, it should be classified under 848120 (valves for oleohydraulic or pneumatic transmissions). However, if it can also be used in other systems, it is still classified under 848110. Judgment should be based on actual use and design.
Q: Does a pressure reducing valve with solenoid control affect classification?
A: If the solenoid control part only drives the valve, the whole is still classified as a valve, i.e., 848110. However, if the solenoid part has an independent function, it may need to be classified separately. It is recommended to consult a professional customs broker.
Q: How do 848110 and 848140 differ?
A: 848110 is a pressure reducing valve, used to reduce and stabilize outlet pressure; 848140 is a safety valve or relief valve, used to release pressure when overpressure occurs. The core difference is function: pressure reducing valves actively regulate, safety valves passively release pressure.
Q: Does the material of a pressure reducing valve affect the HS code?
A: Material usually does not affect six-digit subheading classification, but it may affect three-digit or four-digit heading classification. For example, plastic valves may be classified under 3917, but metal valves under 8481. Therefore, it is necessary to confirm whether the material is metal.
Q: How should a pressure reducing valve sold via cross-border e-commerce be declared?
A: Cross-border e-commerce must declare according to the actual goods, providing elements such as product name, use, brand, model, etc. For small parcels, declaration may be simplified, but the HS code still needs to be accurate to avoid customs clearance problems. It is recommended to use 848110.00.00.
⚠️ Disclaimer: HS code classification, declaration elements, tariff rates and regulatory conditions on this page are for reference only and do not constitute legal advice on customs classification. Tariff rates and regulations are subject to change; the latest announcements from the General Administration of Customs and on-site determinations shall prevail. Please consult professional customs brokers or customs authorities before import/export.