Home / Our Products / Hydraulic System / ST-AB Series – Sunstuff Airblast Sprayer ST-AB Series – Sunstuff Airblast Sprayer Features High performance axial fans 700mm. 36 inch fan 600 litre model available 3 Piston Diaphragm pumps. Optional conveyors available Strong UV polyethylene tanks. Fully galvanized frames Stainless steel spray lines Direct PTO drive pump