Key Features：

Strict adherence to JIS standards – Design, manufacturing, and testing follow dedicated JIS standards such as the F73xx series. Products typically carry approvals from major classification societies including NK, ABS, LR, and DNV.

Variety of materials to suit the marine environment – To combat the high corrosiveness of seawater, common materials include cast iron, cast steel, or bronze. Bronze alloys (tin bronze, aluminium bronze) offer excellent resistance to seawater corrosion and biofouling.

Predominantly outside‑screw wedge structure – Most valves use an outside‑screw and yoke (OS&Y) wedge gate. The stem rises and lowers with the gate, making the open/closed status clearly visible for easy operation and maintenance.

Reliable sealing performance – Typically employ metal‑to‑metal hard sealing (bronze‑to‑bronze). Critical parts such as seat rings and gates are made of corrosion‑resistant materials like stainless steel or bronze.

Designed for shipboard conditions – The construction is reinforced to withstand vibration, shock, and rolling/pitching encountered during navigation. Stem seals are robust, and some models support on‑line packing replacement for convenient maintenance while at sea.

Standardised flange connections – Flange dimensions strictly follow JIS B2220 and related standards, ensuring full compatibility with existing ship piping systems for easy installation and replacement.

Technical Specifications Overview：

JIS F7363C – Cast Steel 5K Gate Valve：

IS F7366 – Cast Steel 10K Gate Valve：

JIS F7364 – Cast Iron 10K Gate Valve：