The SS316L non‑rising stem gate valve DN80 (3″) is ideal for space‑limited piping in corrosive services. Its stem does not lift, saving headroom. 316L (low carbon, Mo added) offers excellent resistance to chloride attack, making it suitable for seawater, chemical, and pharmaceutical applications.The main gate valves product names of China gate Valve Network include:GB Bellows Wedge Gate Valve,High Temperature & pressure Power Station Gate Valve,Inside Screw Non-rising Stem Wedge Gate Valve,Insulation Jacket Gate Valve,Lined Gate Valve,MZ44W Rising Stem Gas Quick Open&close ParallelMZ48W Manual Non-rising Stem City Gas Quick Gate Valve

The SS316L non‑rising stem gate valve DN80 (3″) is ideal for space‑limited piping in corrosive services. Its stem does not lift, saving headroom. 316L (low carbon, Mo added) offers excellent resistance to chloride attack, making it suitable for seawater, chemical, and pharmaceutical applications.

2026 Price Reference (USD, ex‑works)

PN16 flanged: $120–170 per piece, bulk (10+ pcs) $105–150

PN25 flanged: $155–220

Wafer type: $100–135

Prices vary with molybdenum cost, pressure rating, brand, and certification.

Key Selection Parameters

Size: DN80 (3″, pipe OD 89mm)

Pressure: PN16, PN25 or Class 150 – working pressure ≤90% of rated

Connection standard: Flanged to GB/T 9113, DIN, or ANSI – must specify

Face‑to‑face length: ~203mm for PN16 flanged (GB/T 12234); wafer type ~100mm

Seat type: Metal‑seated (Stellite hardfacing, ≤450°C) or soft‑seated (PTFE, bubble‑tight but ≤200°C)

Stem packing: PTFE (≤200°C) or flexible graphite (≤450°C)

Operation: Handwheel (position indicator required), optional gear, electric or pneumatic (ExdIIBT4 etc.)

Why 316L?

Resists chloride pitting (up to 1000ppm at room temperature) and intergranular corrosion. Suitable for seawater, brine, dilute sulfuric acid, bleach, purified water. Not for strong HCl, concentrated H₂SO₄, or high‑temperature high‑chloride solutions.

Installation & Maintenance Tips

Install with flow arrow (preferred low‑in high‑out); never upside down.

Lubricate stem threads monthly; cycle fully open‑close quarterly to prevent sticking.

Minor stem leakage: tighten gland nuts evenly. Major leakage: replace packing (depressurize, valve fully open).

Common failures: incomplete closure (lap seats), heavy handwheel (add grease), external stem leak (adjust packing).

Selection Checklist

DN80, specify pressure rating

316L material certificate required

Flange standard (GB/DIN/ANSI)

Face‑to‑face length (mm)

Seat type & temperature limit

Third‑party inspection (if needed)

Bottom line: The SS316L non‑rising stem gate valve DN80 is the top choice for corrosive, confined spaces. Proper selection and regular maintenance ensure long‑term reliability.

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