Application of Continuous Positive Airway Pressure (CPAP) in neonate with respiratory distress is associated with reduction of respiratory failure, reduced complications and mortality. Devices used to generate CPAP include conventional ventilators, the "bubble bottle" system and the infant flow driver. CPAP supports the breathing of preterm infants in a number of ways. It splints the upper airway and reduces obstruction and apnea, assists expansion of the lungs, and prevents alveolar collapse. But when we consider using Bubble CPAP system in Emergency Medical Services like Air Ambulance, it is extremely difficult to maintain constant back pressure created by bubbles in water bottle to the expiratory end of nasal prongs of an infant. So in order to provide constant back pressure, there is a need to replace water bottle which produce back pressure by bubble at expiratory end with a Electro-Mechanical constant pressure generating system. A Proportional solenoid valve based Electro-Magnetic Pressure Generator device is proposed, which produce constant back pressure of 5-10cmH2O Pressure and Pressure versus Voltage relationship is studied which shows pressure generated is proportional to input Voltage.