Selects the international name brand intelligence frequency conversion constant pressure velometer and the programmable microcomputer controller numeral PID closed loop adjustment, the healthy plate operation numeral demonstrated, entire automatic movement The applicable scope industry, the life, the fire constant pressure water supply control air conditioning cooling water circulation constant temperature, the constant pressure control the city square musical fountain the automatic water supply control Technical parameter control mode: Constant pressure starting way: Many kinds of electrical machinery power: <= 315kW control quantity: Does not limit