What are the common faults of high-temperature hot water pumps

2024-10-12 15:46:53

1. Analysis of Leakage Fault at the Packing of High Temperature Hot Water Pump:

1) The selection of fillers is incorrect, they are not resistant to the erosion of the medium, and the hot water pump is not resistant to the use of low pressure or vacuum, low temperature or high temperature valves;

2) The filling device is incorrect, with drawbacks such as replacing large with small, poor drilling around joints, and loose tightening and loosening;

3) The pressure cap is skewed, and the gap between the pressure cap and the valve stem is too small or too large, causing wear on the valve stem and damage to the packing of the hot water pump;

4) The cover, bolts, and other components are damaged, causing the cover to be forced to tighten;

5) Fillers are better than their service life, as they have aged and lost their elasticity.

2. Analysis of valve body and valve cover leakage faults and corresponding solutions:

1) The quality of cast iron casting is not high, and there are defects such as sand holes, rigorous structure, and slag inclusion on the valve body and valve cover. The casting quality should be popularized, and the front width of the device should continue to be tested for strength according to regulations;

2) Cold weather cracking: Valves with temperatures below 0 ° C should be kept fresh or heated, and valves that remain in use should be drained of water;

3) Poor riveting, with defects such as slag inclusion, lack of riveting, stress cracks, etc.: The welds of the valve body and valve cover composed of riveting should continue according to the unrelated submersible axial flow pump riveting operation procedures, and after welding, further testing and strength testing should be carried out;;

4) Cast iron valves are damaged after being hit by heavy objects: It is forbidden to push or place heavy objects on the valve, and it is not allowed to use a hammer to hit cast iron and non-metallic valves. The device for large-diameter valves of hot water pumps should have brackets.