View Petroster Sp. j. on TEKEN44SFA is a series of breathing valves with a three-way design, dedicated to specialized applications and installations operating in closed vapor circulation. Unlike EFA and RFA, SFA valves have separated overpressure and underpressure discs, which allows for an individually selected ratio of the inhalation and exhalation operating parameters to each other and the use of a closed circuit (e.g. discharge of vapors into the pipeline). Their main tasks are to automatically regulate the pressure inside the tanks and prevent spontaneous emission of vapors into the atmosphere. They are class II 1 G c T6 devices, therefore they can be used in any explosion hazard zone. Proportional operating characteristics, no pressure drop below the setting throughout the entire operating range, high tightness and the same valve closing and opening pressure are a number of features that make them suitable for use with demanding installations, including nitrided and metered installations. The design of SFA valves is based on high-performance industrial solutions, thanks to which they are characterized by high throughput, high tightness and failure-free operation.
EN 1127-1
Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
EN 13463-1
Non-electrical equipment for use in potentially explosive atmospheres - Part 1: Basic method and requirements
EN 13463-5
Non-electrical equipment intended for use in potentially explosive atmospheres - Part 5: Protection by constructional safety 'c'
ISO 28300
Petroleum, petrochemical and natural gas industries — Venting of atmospheric and low-pressure storage tanks
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