Reliable fluid handling with an ATEX single seat valve

The Alfa Laval Unique SSV ATEX delivers technical reliability for hazardous environments. The specific construction utilizes a single contact surface between the plug and the seat to reduce potential bacterial build-up. This streamlined flow path ensures that the equipment remains easy to clean, supporting hygienic integrity in sensitive applications. The pneumatic operation is remotely managed, protecting process lines against pressure peaks through smooth actuator movement and few moving parts. The valve is built on the well-proven Unique SSV platform, specifically certified for environments with explosive atmospheres.

Configuring the modular pneumatic shut-off valve

The valve bodies, plugs, and actuators are interchangeable, allowing for setups as either a shut-off valve with two to four ports or a change-over valve with up to six ports. This adaptability allows a single platform to serve multiple functions across a plant, which helps minimize spare parts requirements. The use of clamp rings for assembly facilitates rapid maintenance, while the yoke-connected actuator ensures a stable link to the valve body for long-term service life. The system is available in one-, two-, or three-body configurations to meet specific process demands.

Defined compression for seal durability

To maximize service intervals, the valve seals are optimized through a defined compression design. This engineering approach ensures that the elastomers, available in EPDM, HNBR, or FPM, maintain their integrity under high-pressure conditions up to 10 bar. By controlling the compression of the seals, the valve avoids the premature wear often associated with mechanical over-stressing. Furthermore, the semi-maintainable actuator is backed by a five-year warranty, reflecting the mechanical durability designed into the equipment. The internal surface finish is polished to Ra < 0.8 µm to prevent product adhesion and bacterial growth.