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Series 716: Ductile Iron Gate Valves

The series 716 valve is an all ductile-iron valve offered by AVK Overseas. It is available in flange by flange end configurations in sizes 3-inch (DN80), 4-inch (DN100) and 6-inch (DN150).


  • All Ductile Iron construction for strength and light weight
  • Flanges are drilled to ANSI/ASME B16.1 Class 125
  • Laying lengths are to ANSI/ASME B16.10
  • Pressure rated to 250 psi (PN16)
  • Internal coating certified to ANSI/NSF 61
  • Stainless steel stem
  • Lead free
  • Threads rolled in a separate cold pressing process to enhance strength
  • Rolled threads ensure smooth thread edges and low operating torques
  • Twice the yield strength required by AWWA eliminates bent and broken stems
  • Bonnet and gland flange bolts are countersunk and capped with hot melt to totally isolate the bolts from corrosive environments
  • O-ring bonnet gasket wraps each bolt to prevent corrosion
  • Ductile iron wedge fully encapsulated in EPDM rubber with an integral bronze stem nut for optimum corrosion protection and precision wedge tracking
  • Wiper ring - to prevent impurities from entering the stem and to protect the o-rings
  • Two o-ring stem seals to reduce friction and prevent wear and tear - replaceable under full pressure
  • Third o-ring stem seal protects upper stem from impurities entering from the water way
  • Coating to AWWA C550 - Electrostatically applied fusion bonded epoxy coating inside and outside for excellent corrosion resistance
  • Designed and built to widely recognized international standards.
  • 100% testing - All valves tested to 250 PSI leak test / 500 PSI shell test as required by AWWA