U-ISO-H/V/G series high velocity pressure/vacuum valve is designed to prevent the flame passage into cargo tanks and to relieve excessive over pressure or under vacuum of cargo tanks during cargo loading, discharging, ballasting and thermal variation.

High Velocity Pressure Vacuum Relief Valve have been manufactured over 25 years, and reliability has been verified. Also, design for all functions has been upgraded in order to solve customer's difficulty. Mainly, the performance of flow & flashback test has been verified, and the engineering for venting system can be implemented by long term experience expert.