ZPB-type injection pump in the coal mine and chemical companies, often using some medium-sized pump, the pump power is relatively large. For centrifugal pumps, the pump at startup certainly be filled with liquid (water), which is commonly referred to as plus water. Before the pump in order to allow the liquid to be stored in the pump body, under normal circumstances should be installed at the end of the centrifugal pump suction valve, foot valve must have a certain resistance, long-term work when the centrifugal pump, it will cause energy waste compare costs of electricity. Increase ZPB type injection pump, centrifugal pump after removing the bottom valve, using pressure water or compressed air as power, according to the principle of the jet pump and the suction pipe negative pressure and let the pump body is full of water, to no purpose valve operation. One, ZPB-type injection pump uses ZPB type injection pump for energy-efficient products, typically used in the coal mine, supporting the use of centrifugal pumps. After removing the bottom valve and medium-sized centrifugal pump with a spray can absorb the water, no bottom valve of pump operation, both to reduce the degree of labor, can achieve significant energy-saving effect, generally tons of water-saving of 5% to 27 %. Two, ZPB-type injection pump composed ZPB type injection pump, also known as soda dual jet pump, jet pump assembly from the jet pumps, valves, vacuum gauge, pipe and pipe fittings components. Three, ZPB-type injection pump models and specifications ZPB-type jet pumps in three sizes, the pressure is low pressure (ZPBD type), medium (ZPBZ type) and high pressure (ZPBG type) three, each using the table below, Selection can consult Warwick Pump Co., Ltd., Jinan. Working medium pressure ZPBD model type ZPBZ type ZPBG type of work pressure water Kgf / Cm2 2 ~ 16 16 ~ 40 40 ~ 100 pressure gas (steam) Kgf / Cm2 2 ~ 5 2 ~ 5 2 ~ 5 working medium control valve model J41-16 J43 (53) H-40 J43 (53) H-100 four, ZPB type injection pump installation according to the pump using the site, install the form can be divided into single and multi-pump operation. Single pump installation, each jet pump only for supporting the getter pump and suction on the water. Multiple pumps in parallel installation, which together form multiple pumps each station using a jet pump. Use the main pumping station in the coal mine, using the working medium (ie, high-pressure water, compressed air, reserve water) as the driving force, multiple jet pumps in parallel, each other back, so that the work can be Renyiyitai injection pump when the pump starts Renyiyitai achieve a downhole pump central pump room full remove the bottom valve. Saying that the installation in the form of more power, more than one injection pumps in parallel each other back in Sheung Shui system. Five, ZPB-type injection pump Caution 1, high pressure valves open Note: A When the valve shut-off valve should pay attention to gradually open big, if the valve opening is too small may lead to inadequate water flow, causing the jet pump is not working properly ; B plug to pay attention when using a slow opening, to avoid sudden opening of the impact and damage caused by hydraulic jet pump. 2, when the pump after removing the bottom valve, the water should be diverted to the pump suction pipe, and to ask the pump shaft packing does not leak, pipe seals well, not into the air. Otherwise it will affect the suction effect of the jet pump.