The first Dallai quick action coupling was produced in 1959 and it is fully interchangeable with all similar couplings manufactured in Italy. The type D range is made in steel, stainless steel and aluminum material and, according to particular needs, can be supplied with safety clamps. It is mainly used in the irrigation field and in several other applications such as drainage, sewage transportation, road
construction, food and chemical industry. Its use is particularly widespread in Europe and North Africa.