MAINTAIN STABLE TANK PRESSURE WITH PRESSURE VACUUM VALVES
Pressure vacuum valves (PV valves) are crucial for protecting cargo tanks from excessive overpressure and underpressure.
Tank pressure fluctuations are a core, recurring challenge due to pressure increases during loading and temperature changes during transport. A PV valve maintains tank atmosphere pressure within preset limits by enabling the flow of small vapor quantities through valve breathing during transport and accommodating higher flow rates during loading.
In case of overpressure, the high-velocity valve releases vapor directly Ito the surrounding atmosphere in an upward direction through high-speed venting. Conversely, in the case the tank pressure drops below atmospheric levels (underpressure), the vacuum side of the valve draws air into the tank.
An in-line pressure vacuum valve is designed to maintain a preset, stable pressure range inside cargo tanks. It ensures excess pressure is vented or low pressure is adjusted with safety. A flame arrester placed inside the mast riser of the PV valve ensures that hazardous gases are safely managed, and flames cannot enter the tank, providing an additional layer of safety.
A FULL RANGE OF PRESSURE VACUUM VALVES
At Bay Valves, our full range of pressure vacuum valves covers all your valve needs for managing vapors and gases during loading, storage, and off-loading operations. This includes pressure vacuum relief valves and high-velocity valves designed for use on floating storage units such as FPSOs, FSOs, oil and chemical tankers, and their service vessels, such as shuttle tankers and PSVs.
We understand that specifications and requirements for PV valves vary as per the cargo the vessel is carrying. That is why, we are here to offer our expertise in helping our client select the optimal PV valve system suited to their needs.
PV Valves custom-made to your specifications
At Bay Valves, our PV valve innovations not only meet the broad challenges of the marine industry but are often inspired by unique needs directly brought to our attention by our customers. We are always ready to collaborate with you to co-create custom-made solutions designed to meet your specific needs, be it pressure-vacuum relief valves, breather valves, or other types of PV valves.
We know the PV valve system requirements vary as per vessel type and the requirements for venting rate also differ. Take the characteristics of FPSO and FSO systems which are different from those of traditional oil tankers. Based on our expertise, we understand the major causes of variation in the required venting rate, such as high gas evolution factor because of temperature difference between oil and inert gas, and variation in loading rate.
Contact us to learn about our past projects and explore how we can create a solution that’s right for you.
PVRV valves certified for FPSO vessels
Your FPSO vessel needs to operate smoothly with no interruptions or breakdowns. And our straight-mounted, flame arrester-integrated pressure-vacuum relief vent valves (PVRV valves) are designed to do just that. And even more. These valves offer high capacity and low pressure drop, enabling in-situ maintenance that significantly reduces downtime compared to traditional pressure vacuum valve designs.
Our PVRV valves are ATEX-certified, guaranteeing effective flame passage prevention, adherence to strict regulatory standards, and complete vessel safety at every level.
Key features of our PVRV valves
- Adjustable negative pressure drop and flexible customer-specified closing pressure with a maximum 0.5 kPa pressure drop over the valve
- Option to adjust settings without removing the valve from the system, reducing downtime, improving efficiency, and saving costs
- Maintenance of valves using a valve cradle for vacuum side removal while the valve is operational
- Uninterrupted pressure side operation, minimal downtime, and greater profitability.
- Vacuum side near cargo oil tank (COT) to reduce pressure drop during unloading, especially for FPSOs with high cargo transfer rates
- Dedicated trolly-sized valve cradle for safe transportation to maintenance workshops