Abstract: In a device for accomplishing a method of regulating the spraying of coating material such as paint, the coating material is fed by a pump (1) to a spray device (2). A flow transducer (4), which generates a true flow signal (Q.sub.A), a pressure transducer (6), which generates a true pressure signal (P.sub.A), and an actuator (5), which sets the pressure of the coating material in accordance with the control pressure signal (P.sub.C), are provided in the supply line between the pump and the spray device. A co-efficient signal (K) is formed by an estimator (8) as a function of the true flow signal (Q.sub.A) and a chosen set-point flow signal (Q.sub.R). An adaptor (7) determines a set-point pressure signal (P.sub.R) as a function of the set-point flow signal and the co-efficient signal. A pressure regulation circuit (9) determines the control pressure signal (P.sub.C) as a function of the set-point pressure signal and the true pressure signal.