Double-diaphragm Pump

Double Diaphragm pump is a type of positive displacement pump that compresses fluid by decreasing the volume of a chamber containing the fluid. The pump offers smooth flow, reliable operation, and the ability to pump a wide variety of viscous and impure liquids. With easy flow control, a double-diaphragm pump can fit a broad range of applications and capacities. Double-diaphragm pumps have become so advanced that nowadays many engineers are making the change from traditional centrifugal to double-diaphragm pumps.

How does a double-diaphragm works?
Double diaphragm pumps are mechanically, hydraulically, or pneumatically oscillated to displace the liquid or gas. The compression enters the air distribution valve from the entrance of the pump, draw the compression air into one cavity through the air distribution mechanism, and push out the diaphragm movement in the cavity. The gas in another cavity will be drained. Once reaching the stroke terminal, the air distribution mechanism will automatically draw the compression air into another working cavity, push out the diaphragm to move towards the opposite direction so as to let the both diaphragms continuously reciprocate motion in synchronism.

Applications of Double Diaphragm Pump:
Double diaphragm pumps are used in variety of industries and other applications. They are as follows:

• Chemicals
• Paints
• Brewing
• Toiletries
• Cosmetic
• Pharmaceutical
• Automotive
• Water
• Food and Beverage
• Marine Applications etc.

Uses and Features of Double Diaphragm Pump:

• Diaphragms can come in many different materials such as nitrile, neoprene, polyester, polyurethane, rubber, polytetrafluorethylene etc.
  
  
• The housing materials for double diaphragm pumps are like acetal, aluminum, cast iron, hastelloy, polypropylene, stainless steel.
  
  
• Diaphragm pumps can run dry for extended periods of time.
  
  
• Double-diaphragm pumps bring processors considerable advantages over centrifugal pumps, only because of their versatility in different processing applications.
  
  
• The double-diaphragm pump can handle a vast range of products and product viscosities, extending even to soft suspended solids.
  
  
• They are extremely versatile in handling the different flow and pressure requirements of specific applications.
  
  
• Double-diaphragm pumps are less expensive to install than electrically powered pumps.
  
  
• Wear and tear is an important issue with all types of process pumps. Because of their simple design, double-diaphragm pumps have no shaft seals or packing glands which can wear and require frequent maintenance.