The pneumatic ball valve installed at the outlet of the water pump is used for shock absorption, expansion and contraction, disassembly and repair; The actual installation sequence should be: pneumatic ball valve, check valve, gate valve. It is better to install the pressure gauge on the water pump outlet, but it must be in front of the check valve. During normal operation, the gate valve is not operated very much, while the check valve is frequently operated, so the maintenance probability is high. During maintenance, closing the gate valve of the pump outlet pipe can maintain without affecting the normal operation of the system. The pressure gauge is installed in front of the check valve to prevent the impact and damage of water hammer on the pressure gauge.
If the flexible pneumatic ball valve or expansion joint installed at the outlet end of the water pump is not equipped with anti pull off and limit devices (bolts), under the action of the blind plate force, the pipeline system may sometimes have pipeline or equipment deviation, and in serious cases, the pump casing may be damaged or the flexible pneumatic ball valve may be pulled out of the flange or the expansion joint may be pulled out, causing the water supply system to fail to work normally.
Therefore, in order to ensure the safe operation of the system, anti pull off flexible pneumatic ball valve and expansion joint with limit can be selected or fixed pipe support can be set, and necessary check and calculation can be carried out to eliminate the influence of blind plate force on the pipeline system. It is known that the valve pipe joint is also called pneumatic ball valve, which plays a role in reducing vibration and noise in the pipeline. Moreover, if it is used on a water pump, its main function is to prevent the negative pressure from flattening and withstanding short-term internal pressure, to avoid the lower end of the suction pipe swinging due to the power and suction vibration of the pump, so that the water flow can be evenly increased and the power consumption of the pump can be reduced. In addition, because the inner wall of the pneumatic ball valve is vertical without grooves, It also prevents vortex when the water pump absorbs water, thus improving the efficiency of the water pump.