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M6400 Watts

Single Chamber Control Valve - Reduced Port with Mechanical Check

Series M6400, M61400 are reduced port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part within the valve allowing it to open, close, or modulate as commanded by the pilot control system. The lower portion of this two-piece assembly is a mechanical check feature, which acts independent of diaphragm position or pilot control system, and provides immediate check action when flow ceases. The reduced port design offers improved low-flow performance and cavitation resistance. The Stainless Steel design offers superior corrosion resistance, as well as a lightweight alternative to conventional heavy iron valves. Stainless Steel construction provides extended diaphragm life, and reduces the frequency and labor costs associated with traditional maintenance repairs.


  • Body and cover are constructed of strong and durable ductile iron (ASTM A536)
  • One-piece assembly opens, closes, or modulates as commanded by the Pilot Control system
  • Mechanical check feature provides immediate check action when flow ceases.
  • Simplified and efficient design is easy and economical to maintain

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific M6400