Find HS Code and trade information for pressure reducing valve

Pressure Reducing Valve

A pressure reducing valve (PRV) is a valve designed to automatically reduce a high inlet pressure to a desired lower outlet pressure, and maintain that reduced pressure despite fluctuations in the inlet pressure or downstream flow demand.

Material

PRVs are constructed from a variety of materials, selected based on the fluid being controlled, pressure and temperature requirements, and compatibility with the environment. Common materials include:

• Brass: Commonly used for lower pressure, non-corrosive water applications.
• Bronze: Offers better corrosion resistance than brass, suitable for water and some mild chemical applications.
• Stainless Steel: Provides excellent corrosion resistance and is used for a wide range of fluids including water, oil, gas, and aggressive chemicals. Grades like 304 and 316 are common.
• Carbon Steel: Used for high-pressure, high-temperature applications, often with internal coatings for corrosion protection.
• Ductile Iron: Offers strength and corrosion resistance for larger valve sizes.
• Polymers (e.g., PVC, CPVC, PP): Used for low-pressure, corrosive fluid applications.

Purpose

The primary purpose of a PRV is to protect downstream equipment and systems from damage caused by excessive pressure. Specific applications include:

• Water Supply Systems: Reducing municipal water pressure to levels suitable for residential and commercial plumbing.
• Industrial Processes: Maintaining consistent pressure for critical equipment like pumps, reactors, and heat exchangers.
• Gas Distribution: Regulating gas pressure for safe and efficient delivery.
• Hydraulic Systems: Controlling pressure for actuators and other hydraulic components.
• Boiler Systems: Maintaining stable steam pressure.

Function

PRVs operate based on a diaphragm, piston, or pilot control system.

• Diaphragm Valves: A diaphragm senses the downstream pressure. When the downstream pressure rises above the set point, the valve modulates to reduce flow.
• Piston Valves: A piston senses the downstream pressure and adjusts the valve opening accordingly.
• Pilot Operated Valves: Utilize a pilot valve to control the main valve, offering higher accuracy and capacity.

The valve automatically adjusts its opening to maintain the desired downstream pressure, compensating for changes in inlet pressure or flow demand. The core components generally include:

• Valve Body: Contains the flow path.
• Seat: Provides a sealing surface for the valve closure.
• Diaphragm/Piston: Senses downstream pressure.
• Spring: Provides adjustable force to set the desired outlet pressure.
• Adjustment Screw/Knob: Allows for setting the desired outlet pressure.

Usage Scenarios

• Residential Plumbing: Protecting pipes, fixtures, and appliances from high water pressure.
• Commercial Buildings: Maintaining consistent pressure for multiple fixtures and equipment.
• Manufacturing Plants: Regulating pressure for process control and equipment protection.
• Oil and Gas Refineries: Controlling pressure in pipelines and processing units.
• Power Generation Plants: Maintaining steam pressure for turbines and boilers.
• Irrigation Systems: Reducing pressure to prevent damage to sprinkler heads and piping.

Common Types

• Direct Acting PRVs: Simple design, suitable for smaller applications. Downstream pressure directly affects the valve operation.
• Pilot Operated PRVs: More accurate and capable of handling higher flow rates. A pilot valve controls the main valve.
• Self-Actuated PRVs: Utilize the energy of the fluid to operate, offering good stability.
• Lockable PRVs: Prevent unauthorized adjustment of the set pressure.
• Relief Valves (integrated or separate): Protect the system from overpressure conditions.
• Stainless Steel PRVs: Corrosion resistant for various fluid applications.
• Brass PRVs: Economical for potable water systems.
• Globe-style PRVs: Common for water applications, offering good control.
• Angle-style PRVs: Space-saving design, often used in residential plumbing.

Pressure Reducing Valve Classification

Based on the provided information, the following HS codes are relevant to pressure reducing valves:

• 8481100020: This HS code falls under Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof) and specifically covers 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 – Pressure-reducing valves Hydraulic fluid power type. This classification applies to pressure-reducing valves designed for hydraulic fluid power systems.

  • 84: Chapter – Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
  • 81: Heading – Taps, cocks, valves and similar appliances.
  • 10: Subheading – Pressure-reducing valves.
  • 00: Further specification – Hydraulic fluid power type.

• 8481801085: This HS code also falls under Chapter 84 and covers taps, cocks, valves and similar appliances, including pressure-reducing valves; parts thereof – Other appliances: Hand operated: Of copper Having a pressure rating of <850 kPa> or over: Ball type. This classification applies to hand-operated, copper pressure-reducing valves with a pressure rating of 850 kPa or higher and of ball type.

  • 84: Chapter – Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
  • 81: Heading – Taps, cocks, valves and similar appliances.
  • 80: Subheading – Other appliances.
  • 10: Further specification – Hand operated: Of copper Having a pressure rating of <850 kPa> or over: Ball type.

Tariff Information:

Both HS codes 8481100020 and 8481801085 are subject to a basic tariff of 2.0% and an additional tariff of 25.0%. Effective April 2, 2025, the additional tariff will increase to 30.0%. This results in a total tariff of 57.0% for 8481100020 and 59.0% for 8481801085.