Di Nicola design and manufactures gates wall mounted , channel mounted , on –sitting seal, off –sitting seal , with two-way sealing , type spillway and bottom outlet armed , with manual, electric , hydraulic and gravity in steel construction EN S275J0 , stainless steel AISI 304 , AISI 316 , aluminum , Duplex and Super Duplex high in nickel , with sizes ranging from 300 to 30,000 mm and hydraulic loads from 6 meters to 160 meters . The gates Di Nicola are tested in accordance with Standard AWWA C561-04 and DIN 19569-04 Class 5 . The company Di Nicola produces non-standard at the request of customers .