The pipe section outside the pump outlet is the pressure pipe section. The pressure pipe section is equipped with a pressure gauge to measure the pump outlet pressure. The ball check valve is used to prevent liquid backflow in the water pipe section. Generally every time before pumping the pump must be filled with water, commonly known as water diversion. In addition. A drain should also be installed to direct the leaked water from the packing lid to the drain. Sometimes, for the need for anti-vibration, the pump at the entrance of the general selection of K-ST-type flexible rubber joints. Because the centrifugal pump is the impeller to pump the water out of the pump after the formation of a vacuum and water, so in addition to the impeller immersed in water centrifugal pump and self-priming pump, the valve used to adjust the size of the flow. In addition, installed in the heating, air conditioning system on the pump also need to install the thermometer. Panda water pump there are two ways: First, directly to the pump water (at this time should open the vent hole drain pump air); Second, the pump gas to go, to establish a certain degree of vacuum (at this time to close the outlet Gate valve), the introduction of water to go. The following describes several centrifugal pump water and gas exhaust method.
1.With hand pressure pump water. Some pumps come with hand pressure pumps and can also be purchased or self-made small hand pump installed in the inlet must be installed gate valve. After the valve closed, first with a small amount of water filled with water pressure machine for water, and other hand pump after the water, said the pump has been filled with water, you can boot work.
2.The use of vacuum equipment exhaust water. Centrifugal pump from the exhaust and vacuum pump pumping negative pressure exhaust is the same reason, so the use of water ring vacuum pump exhaust to achieve the role of water.
3.Filled with water in the inlet and outlet installed valve . This method is  installed a valve in the water pipe, connected to the water pipe to the pump filled with water.