It is available also as an accessory for all other existing holding furnaces. Fornace pressurisation control composed of a proportional command valve, analogical pressare transducer and regulating instrument. Possibility of setting cycles with 8 fields of pressure variation. PID control and automatic compensation of the reduction of the metal level in the furnace. Graphic display of work conditions and of the deviation of the real furnace pressure from the theoretical value. File containing 20 recipes that can be loaded and modified from the dispay. Valve: proportional with pneumatic actuator Instrument: 96x96 mm (1/4 DIN) for flush fitting in the panel Transducer: PID Display: graphic Power supply: 100  240 VAC 50-60Hz One of the main requirements of the low-pressure casting system is the repeatability of the cycle for injecting the metal in the constant characteristics it is necessary the cycle always remains the same. The furnace pressurisation curve, necessary for filling the mould, must not be ingluenced by any air leaks nor by air leaks nor by pressure variations in the air supply line or the level of metal in the furnace. All this can be achieved using the Borli BPS pressurisation system. The pressurisation of the furnace, obtained by means of a series of pressure ramps, is made possible by a proportional command valve controlled by an instrument that can be easily programmed, which acquires the pressure value inside the furnace and processes the valve command signal. All the components are quick and easy to install; even on existing plants, only a few operations are needed to make the Borli BPS2 system immediately operative.