Tank vent check valves are used on all ships in order to ventilate ballast and void tanks while preventing any contamination of the tank with water during rough seas.

Vent check valves allow for the ventilation of ballast and void tanks while preventing contamination of the tank with water or salt water during rough seas. They offer fully approved protection against pressure buildup for the tank walls and bulkheads while the liquid is loaded or unloaded from the tanks.

Air Vent Heads, Known as Tank Vent Check valves, have different types and flanges, such as Ball tye Vent heads and Disk Type Vent Heads, where Ball type contains Ball Float and Desk type contains Deck Float. Flanges available , PN10, ANSI#150, Jis5k, PN16, etc

AUTOMATIC CLOSING SYSTEM BY FLOAT DISK. APPLICABLE TO USE IN BALLAST AND OIL TANKS. NODULAR CAST IRON BODY, STAINLESS STEEL FLOAT, AND FLOAT GUIDE. CONNECTION FLANGES SPECIFICATIONS ARE BASED ON JIS 5 KGF/CM2 AND DIN PN10 STANDARDS. DNV/GL TYPE APPROVAL CERTIFICATE.