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CD3 (Legacy)

Introduction to the CD3 (Legacy)


The CHEM-FEED CD3 Multi-Diaphragm Pump is a positive displacement chemical metering pump that delivers smooth, continuous chemical feed even when injecting chemicals that off-gas like Peracetic Acid and Sodium Hypochlorite.   

The cutting-edge Hyperdrive Technology allows for alternating pumping action between two diaphragms: when one diaphragm is in the suction phase, the other is in the discharge, resulting in a smooth chemical feed profile and minimizing the risk of vapor lock. CHEM-FEED® CD3 Multi-Diaphragm Metering Pump – YouTube 

The CD3 uses either DiaFlex® or Flex-A-Prene® diaphragms.  DiaFlex® diaphragms are guaranteed to last the life of the pump. 

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Product Overview / Features of the CD3 (Legacy) Peristaltic Pump 

  • The CD3 (Legacy) pump can deliver up to 52.6 GPH (199 LPH) at 100% motor speed.  
  • Up to 145 psi. (See pump curve for exact pressure requirements at specific flow rates) 
  • Brushless DC Motor capable of 1,000:1 turndown.  
  • 10-button LCD Display. 
  • Manual Speed Control. 
  • Remote Start/Stop. 
  • 4-20mA input and 4-20mA output. Fully scalable at the pump.  
  • Pulse and Frequency input speed control. 
  • Four Alarm Outputs. (programmable)  
  • Integral DFD (Diaphragm Failure Detection) leak detection.  
  • Manual Cycle Adjust Mode.  
  • Dispensing Mode. 
  • FVS (Flow Verification System) input.  
  • Manual Prime. 
  • Wetted parts are PVDF connectors/manifold and pump head, DiaFlex or Flex-A-Prene diaphragms, Alfas or EP O-rings/Seats, and ceramic ball checks (optional Teflon ball checks.)  
  • Removable terminal blocks and junction box for communication wiring. 
  • 2 Year Limited Warranty. 


The MD3(Legacy) pump is designed to provide smooth chemical feed for a variety of chemicals and processes.  It can reliably pump chemicals that off-gas such as sodium hypochlorite, peroxide, ammonia, and PAA (peracetic acid), as well as a variety of other chemicals.  

The smooth flow profile and full diaphragm stroke allow the CD3 (Legacy) to effectively pass gasses without vapor-locking, minimizing the need for re-priming.   

The CD3 (Legacy) pump is constructed of chemical-resistant materials, making it an excellent choice for aggressive acids and mixed or proprietary chemicals. 

Product Matrix  

Use this matrix to reference your product number.   

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