The Push-to-connect couplings as per ISO 7241/series 1 are the most important reference couplings in agricultural engineering. The QRC-IA series is exceptionally resistant to corrosion. The burst pressure is at least four times the operating pressure. The series is available from stock in eight sizes from DN 6 to DN 51 for operating pressures up to 350 bar (depending on coupling size). The compact design allows use in tight machine spaces. The series IA is particularly suitable for agricultural and forestry machines.