Check Valve

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• General Info

  A check valve, commonly known as a one-way valve, is designed to allow fluid to flow in only one direction, effectively preventing backflow in a piping system. These valves operate automatically, meaning they do not require manual operation or external power; they work based on the movement of the fluid itself.
  
  Key Components
  Body: The outer casing of the valve, made from materials like stainless steel, plastic, or cast iron, depending on its specific application.
  Disc or Ball: This component moves to either permit or block fluid flow. Different types of check valves use various mechanisms for closure.
  Seat: The area inside the valve where the disc or ball rests to prevent backflow.
  
  Working Principle
  In a check valve, fluid pressure in the correct direction opens the valve, pushing the disc or ball away from the seat. If the flow reverses, back pressure forces the disc or ball back to the seat, blocking the flow and preventing backflow. This mechanism is essential for protecting equipment from potential damage caused by reverse flow, particularly in pumps and compressors.

• Specification

  Common Check Valve Sizes
  Small Sizes: Typically range from ¼ inch to 2 inches (6 mm to 50 mm). These are commonly used in applications such as laboratory equipment, small HVAC systems, and low-flow water pipelines.
  Medium Sizes: Covering from 2 inches to 8 inches (50 mm to 200 mm), these sizes are often found in various industrial applications, including water treatment plants, oil and gas pipelines, and chemical processing.
  Large Sizes: These sizes can range from 8 inches to 36 inches or more (200 mm to 900 mm+), and are used in high-flow applications like municipal water systems, large HVAC systems, and wastewater treatment facilities.