For water, HVAC, and general industrial lines following Japanese standards, the DN80 (3″) JIS 10K cast iron gate valve is a common choice. But do not confuse 10K with PN16 – their flanges are not interchangeable.The main gate valves product names of China gate Valve Network include:Inside Screw Non-rising Stem Wedge Gate Valve,Insulation Jacket Gate Valve,Lined Gate Valve,nsulation Jacket Gate Valve,Lined Gate Valve,MZ44W Rising Stem Gas Quick Open&close ParallelMZ48W Manual Non-rising Stem City Gas Quick Gate Valve,Manual Knife-shaped Gate Valve,Manual Slurry ValveManual Wedge Copper Gate Valve,Manual Vacuum Isolated Wedge Gate Valve,Manual Welding Vacuum Wedge Gate Valve,Manual Wedge Gate Valve

2026 Price Reference (USD, ex‑works)

Imported KITZ costs over 10 times more due to full JIS compliance, material traceability, and precision machining.

Key Parameters & Standards

• Flange standard: JIS B2239 10K – DN80 bolt circle ⌀185 mm, 8 holes (not compatible with GB PN16)

• Face‑to‑face length: JIS B2002 – 200 mm

• Pressure‑temperature (JIS B2051:2024):

  • -10～120°C → 1.4 MPa

  • 220°C (saturated steam) → 1.0 MPa max

• Body materials: Gray cast iron FC200 (brittle) or ductile iron FCD450 (tough)

• Seat: Bronze or Stellite hardfacing

Selection Tips

• Flange mismatch is the most common mistake. Always verify bolt circle before ordering.

• For steam above 120°C, downgrade pressure to 1.0 MPa – never exceed.

• Ductile iron is safer for vibration or low‑temperature impact.

• Non‑rising stem (with position indicator) saves headroom but needs visual check.

Bottom Line

A JIS 10K DN80 cast iron gate valve costs $70–930. Match flange standard, respect temperature‑pressure limits, and choose ductile iron for demanding sites. That ensures reliable service and avoids costly mismatches.

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