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Excellence in Safety and Environment

Reduction of Vapour Emissions - Safe Plant Operation

PROTEGO® Valves help to reach Net Zero for a Sustainable Future

Due to the highly developed manufacturing technology of PROTEGO® valves the tank pressure is maintained up to set pressure with a tightness that is far superior to the conventional standard. According to the PROTEGO® Standard PS-001 leak rates are measured at 90% of the set pressure. This testing ensures PROTEGO® Valves exceed the most stringent leakage rate requirements of EPA, API2000 and EN ISO 28300.

The extreme tightness of PROTEGO® Valves guarantees Zero Emission at Tank Operating Pressure.

Product losses are minimized and emissions are reduced

To meet the goal of emission reduction, PROTEGO® full lift vents utilize 10% overpressure technology. This technology provides very short opening and closing pressure ranges. The vent only requires 10% overpressure above the set pressure to reach full performance. The tank pressure is maintained up to just below the maximum permissible tank pressure.
PROTEGO® 10% full-lift technology vents are a major benefit to emission reduction and to process plant operation.

Emission Saving Potential

for a Tank Farm

The graphic shows calculations based on the VDI 3479 guideline demonstrating the vapor saving potential comparing a 100%, 40% and 10% PROTEGO® full lift type technology. 

The PROTEGO® 10% Technology saves emissions and costs. 

Trusted by leaders worldwide

"PROTEGO® Valves have an excellent tightness. The leakage of the valve is much lower than the requirement of local environmental protection bureaus. We are very satisfied with the PROTEGO® products."

one of the world's largest petroleum and petrochemical companies


The unique PROTEGO® valve technology minimizes product losses and reduces emissions. For isolated cases and dedicated applications, PROTEGO® offers a range of different Pressure and Vacuum Relief Valves. You can find a product overview on this page below.

The right device for all applications

Valves are subdivided into different types according to being flame transmission proof or non-flame transmission proof and by type of installation. Our range of products covers the following:

Valve Technology

Closed vessels or tanks filled with liquids must have an opening through which the accumulated pressure can be released and vacuum in the tank or vessel compensated. For that purpose PROTEGO® Overpressure and Vacuum Relief Valves are provided with weight-loaded or spring-loaded valve discs. In the case of overpressure in the tank, the overpressure valve disc guided in the housing is lifted and releases the volume flow into the atmosphere. When there is a vacuum in the tank, the overpressure of the atmosphere lifts the vacuum disc and the tank is vented.

Operation of the valve under pressure in the tank

Operation of the valve under vacuum in the tank

Special Solutions

Alcohol Applications

PROTEGO® Valves with integrated Flame Arrester

Styrene Application

PROTEGO® UB/SF - Diaphragm Valve with integrated Flame Arrester

Acrylate Applications

PROTEGO® UB/SF - Diaphragm Valve with integrated Flame Arrester

Interested in Valves?

Contact our specialists for your individual requirements.

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