Air Diaphragm Pumps - Stainless Steel - BSP connections
HD Process supply a range of hygienic stainless steel pumps with BSP and fllanged connections.
See photos here and PDFs below related to the P1 (1/2 "), P2 (1"), P4 (1.5”) , P8 (2”) and 3” Wilden (metal) pumps.