Diaphragm Valve

• General Info

  A diaphragm valve is a valve that uses a diaphragm as a flexible membrane to control fluid flow. It is often used in applications that require the isolation of fluids or gases, especially where cleanliness, minimal contamination, and precise control are crucial. Here’s a brief overview of its main features, construction, and applications:
  
  Key Components
  Body: The main structure, typically made from materials like stainless steel, plastic, or other corrosion-resistant metals.
  Diaphragm: The flexible membrane, usually crafted from rubber, elastomers, or other synthetic materials, that creates a seal.
  Actuator: This part controls the movement of the diaphragm, which can be manual, pneumatic, or electric.
  
  Working Mechanism
  The valve operates by moving the diaphragm up or down to either allow or block fluid flow. When the diaphragm is pressed down, it seals against the valve seat, stopping the flow. When it is lifted, it opens up, permitting fluid to pass through.
  
  Types of Diaphragm Valves
  Weir-type Diaphragm Valve: This type has a raised section (weir) in the flow path that allows for precise control, making it suitable for clean or sterile processes.
  Straight-through Diaphragm Valve: This design offers full, unobstructed flow and is commonly used in applications involving slurry and viscous fluids.

• Specification

  Common Diaphragm Valve Sizes
  Small Sizes: Generally range from ¼ inch to 2 inches (6 mm to 50 mm). These sizes are perfect for achieving precise control in small-scale or laboratory environments.
  Medium Sizes: Usually, sizes from 2 inches to 6 inches (50 mm to 150 mm) are commonly found in standard industrial and processing applications.
  Large Sizes: Valves can be manufactured in sizes up to 12 inches or more (300 mm+) to accommodate high-flow requirements in sectors like water treatment, chemical processing, and wastewater management.