Lug butterfly valve metal type 038 DA

  Datasheet (PDF)

The Georg Fischer type 038 DA Lug metal butterfly valve is engineered for automated flow control and reliable isolation in industrial piping systems. Equipped with a double-acting pneumatic actuator from the CN/CHCN series, the assembly delivers rapid, dependable quarter-turn actuation powered by plant compressed air. The threaded lug body facilitates direct bolting between counter-flanges and permits downstream pipeline maintenance while safely maintaining upstream operating pressure. Standardized to EN 558 row 20 face-to-face dimensions and the ISO 5211 actuator interface, this valve ensures seamless mechanical integration and operational safety.

The valve body is cast from GGG40 ductile iron, offering high mechanical strength and pressure containment. Surface protection against aggressive environments is provided by a durable Rilsan coating on sizes DN50 to DN300, transitioning to an industrial epoxy finish on larger diameters from DN350 up to DN600. The ductile iron disc is also Rilsan-coated to promote laminar flow, reduce operating torque, and prevent erosion. Torque transfer is driven by a 1.4021 stainless steel shaft, featuring a single-piece square drive profile for DN50–DN300 and a robust two-piece keyway shaft for DN350–DN600. Working pressure ratings are certified at 10 bar for DN50–DN200, 6 bar for DN250, and 4 bar for DN300–DN600.

The lug body interfaces reliably with standard flanges drilled to PN6, PN10, and ANSI Class 125/150 across pipe dimensions from d63 up to d630. Bi-directional sealing and broad chemical compatibility are achieved through interchangeable elastomer liners, available in EPDM, EPDM/DVGW, FKM, and NBR. As an authorised Georg Fischer distributor, BigWeld delivers fully configured and tested pneumatic valve packages to industrial contractors, water treatment specialists, and utility networks across Europe.