ZDG type medium pressure boiler feed water pump

Product name: Medium pressure boiler feed water pump

Product model: ZDG type

Product flow: 36~180m3/h

Product head: 270~672m

Product material: cast steel, stainless steel, etc.

Overview: ZDG boiler feed water pump is used for medium pressure boiler feed water. This type of feed water pump is recognized as a new energy-saving product by the Ministry of Electrical and Mechanical Engineering, and the operating temperature of the ZDG type medium pressure boiler feed pump can reach 105 °C.

The working principle of ZDG type medium pressure boiler feed pump: the common centrifugal pump connects the impeller shaft of the pump with the electric shaft to achieve the purpose of driving, and the impeller and the electric motor rotate together to work. The canned pump is a non-sealed pump. The rotor and stator of the motor are separated by a shielding sleeve. The pump and the driving motor are sealed in a pressure vessel filled with the pumping medium. This pressure vessel has only a static seal and is sealed by A point winding provides the rotating magnetic field and drives the rotor, which operates in the medium being conveyed. This structure makes the canned pump completely leak-free.

Selection (model) of ZDG type medium pressure boiler feed pump: the selection of the pump is mainly based on the conveying medium, working conditions, flow, head and its variation law. Generally refer to the basic principles: 1. Determine the flow and head according to production needs. 2. Select a pump type with good performance and strong adaptability and guarantee with the flow and head changes required by the project. First of all, in a certain line of products, pumps with high efficiency, good suction performance, and a wide range of use should be selected. When there are multiple pump types to choose from, technical and economic analysis should be carried out, and the best ones should be used. When the actual working conditions require a large head change, a pump with a steep H-Q curve should be used; when a large flow change is required, a pump with a gentle H-Q curve should be used.

Matters needing attention: 1. Before starting the pump, make sure that the valve at the pump outlet is in an open state to ensure the smooth flow of the discharge pipeline. Before starting the centrifugal pump, the valve should be closed. The reason is that the pressure of the reciprocating pump has little to do with the pump itself. Only when the power is large enough can the pump be maintained in a short-term closed-circuit operation, otherwise the pump will be damaged or the motor will be burned. 2. Verify and check the reliability of the safety valve. In order to ensure the safety of the pump or pumping pipeline system, it is necessary to ensure the reliability of the safety relief valve, because only a reliable safety valve can ensure that the entire pipeline is not overloaded in an emergency. 3. For the forced lubricating pump, the lubricating device should be started before the pump is turned on, and the lubricating oil pressure should be within the range specified in the instruction manual. When the pump arrives at the installation site or the warehouse is enough, you generally need to store it for a period of time. During this period, you should pay attention to: 1. If the pump is not painted or installed, a suitable anti-rust agent should be applied to the surface and lubricated with oil. The bearings should be filled with the appropriate Arino, and the bearings lubricated with grease should be tightly filled with one kind of grease, do not use mixed grease. 2. Pump in clean liquid for a short time to clean the suction line, discharge line, pump casing and impeller. After flushing, the suction line, discharge line, pump casing and impeller should be drained of flushing fluid.