Working condition factor for double flanged pipe expansion joints.

Working condition factor for double flanged pipe expansion joints.
In the double flange pipe expansion joint inlet pipe pool under the suction port installed good bottom valve, can improve the suction range of about 1 meter, the purpose of installing the bottom valve is to prevent the suction pipe inside the water backflow to reduce the self-absorption process of unsealed double-flange pipe expansion joint inside the pipeline water by the role of atmospheric pressure backflow affects the self-absorption performance of the double-flange pipe expansion joint.
Reduce the inlet pipe bends, drop height and horizontal interval. Reduce the double-flange pipe expansion joint inlet pipe expansion joints, expansion joints, the smaller the number of the better, an expansion joint loss of suction range of about 1 meter. Set up a suction pipe on the suction pipe of double flange pipe expansion joint.
 
Double flange pipe expansion joint in the first run before the tank should be artificially filled with water, the first run after the suspension, because the height of the pipe inlet pipe is higher than the height of the water surface in the pipe, although the height of the water surface in the tank is lower than the height of the water surface in the tank, the water in the pipe will not flow backward into the pool, so the suction pipeline can be stored in a certain amount of water.
 
And because the height of the outlet pipe of the suction pipe is lower than the height of the water surface in the pipe, so it can ensure that the suction pipe of the double-flange pipeline expansion joint is filled with water, and the double-flange pipeline expansion joint is running, the water in the pipe is pumped away by the double-flange pipeline expansion joint, and the pipe shows a negative pressure, and the water in the pool is replenished under the atmospheric pressure in the suction pipe.