Multi - stage boiler feed water pump without sealed water consequences and role

Boiler Feedwater Pump Seal Water is a chemical deaerated water and condensate water as a main water source, a spare! The two water sources are qualified water, and industrial water quality is not qualified!
 1, the role of boiler water supply pump seal water is:
        1) to the high-pressure water pump, although the seal but still have a certain pressure, in order to prevent the water pump through the shaft and seal the gap between the leakage, from the condensate pump outlet, or salt water jellyfish Pipe a water source as a sealed water!
        2) The water in the feed pump is water with a certain high temperature, which is transferred to the bearing through the shaft or pump metal of the pump, so that the temperature of the bearing rises. In order to control this temperature, the sealing water also cools The role.
      2, the boiler feed pump without sealed water Consequences:
        1) When the seal water passes through the seal, the water forms a water film between the shaft and the seal as the shaft rotates at high speed, preventing the shaft from directly rubbing against the seal. When the loss of sealing water, so that the pump will be high-pressure water supply through the pump shaft and seal the gap between the leakage, resulting in a large number of refrigerant loss;
        2) at the same time high temperature of the water supply through the pump shaft and pump metal temperature to the bearing, so that the bearing temperature increases, but also make the bearing burned;check out for farmland water pumps
        3) high-speed rotation of the bearing and the gap between the seal is very small, when the loss of sealing water, where the water film will be destroyed, the shaft and the seal is likely to friction, so that the pump to increase the vibration Will cause equipment outage and damage.
        So do not underestimate the situation without sealing water, if the pump seal water is just water back to the water is back to the condenser, I suggest you immediately cut the standby seal water, or a short time may also cause the vacuum and damage The risk of pump bearings, in fact, as the condensate pump outlet to adjust this way it is nothing is not desirable is only necessary to control the opening to prevent the whole after the logic of the jump pump that the pump back bad, it should be impossible, because each plant on the condensate Pump protection is due to the logic that is: when the exit of the electric door closed in place after the linkage jump pump.