Bronze gate valves resist seawater corrosion and biofouling, making them the classic choice for ship piping. Tin bronze (ZCuSn10Zn2) is cost‑effective; nickel‑aluminum bronze (C95800) offers higher

For strong acids (sulfuric, hydrochloric, hydrofluoric), alkalis, and organic solvents, a lined gate valve combines carbon steel strength with FEP (F46) fluoroplastic inertness. DN100 (4″) is common

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 in

For steam systems at 550°C, standard carbon steel (WCB) fails – its limit is 425°C. The correct materials are WC6 (1.25Cr‑0.5Mo) and WC9 (2.25Cr‑1Mo) chrome‑moly steel, which maintain strength u

Titanium (TA2/Gr2) is the premier material for seawater service. Its dense oxide film gives nearly zero corrosion in marine environments, making it the top choice for offshore platforms, ships, and de

In LNG, ethylene, air separation, and refrigeration systems, valves must withstand -46°C or lower. Standard carbon steel (e.g., WCB) becomes brittle below -29°C, so low-temperature steel (LCB/LCC) i

Hastelloy (C-276/C-22) is the top material for strong acids, alkalis, and mixed corrosive media. DN65 (2.5″) valves are widely used in chemical, pharmaceutical, and hydrometallurgical plants. Below a

A gate valve that seals “bubble‑tight” is ideal, but in real engineering, a certain amount of leakage is allowed. Knowing leakage classes avoids misjudging valve quality and helps you troubleshoot