INTRODUCTION The difference compensation non-negative pressure water supply equipment we supplied improves regulation and storage capacity comparing with traditional non-negative pressure equipment. It extends the usage scope and avoid disadvantages of big volume of water tank. The pressurizing pumps can get water from the municipal pipe network directly or from water tank. When the water of municipal pipe network is enough, the equipment will get water from the municipal pinpe network for customer usage. When the water of municipal pipe network is insufficient, the pressurizing device will start and get water from water tank. Water in tank will be pressurized and flow into buffer tank, so it plays the difference compensation function. ZWX series difference compensation non-negative pressure water supply equipment with water tank isa kind of intelligent water supply equipment integrating stainless steel pressure pressurization tank, pressurizing pump, flow controller, pressure difference flow regulator, pressurizing device, intelligent control cabinet, pressure buffer tank and complete accessory set. FEATURES 1.Energy-saving: The facility can make full use of the minicipal pipe network pressure to superimpose and boost pressure, and reduce the pump head, thus it saves energy. 2.Environmental protection: The water tank is designed fully sealed, and the ventilation hole adopts reciprocating inlet and outlet filtering device which can completely filter dust and sundries. 3.Unique configuration: Intelligent pressurization device is installed inside the water tank to ensure the well running of the pump under steady pressure of the users network when pumping water from different source. We add time controller in the control system. It will circularly use the water in tank regularly to keep the water fresh. 4.High safety: When the peak period of water consumption lasts for a long time, the hermetic water tank ensures water supply, so it greatly improves the reliability of water consumption. 5.Advanced control technology: Remote monitoring and observation system are set up for holding the dynamic running of equipments on random. 6.Extensive application: It is applicable for all areas requiring secondary pressurization water supply. 7.Standard manufacture: We select Pentair Nocchi pump (original imported equipment), stainless steel plates, and electronic components from international company with brand to meet the high requirements of the products.