Trap selection, installation and maintenance[2012-05-31] ←返回

First, the trap selection The trap according to the working pressure is divided into the trap of low pressure and high pressure steam trap two types. A low-pressure trap (also known as the backwater box) Commonly used have thermostatic steam trap installed in the low pressure steam heating radiator exports, according to the connecting pipe nominal diameter to select, diameter D = 15mm (½ "), 20mm (¾") and 25mm (1 " ) three. (2) high-pressure steam trap Many different types of high-pressure steam trap can be divided into two categories, namely mechanical type (such as pontoon, hang drum, bell-shaped float type, etc.) and thermal power type (such as thermodynamic, pulse, etc.). Trap selection, in addition to the sparse amount of water before and after the valve pressure and stress, are also important parameters. A valve before the pressure p1, when the trap use as a steam drainage, p1 is the value of the drainage point vapor pressure; trap heat transfer equipment used, p1 is the vapor pressure before the heat transfer equipment 95%. Pontoon bell-shaped float type trap in the lower differential pressure. Thermal power pulse trap require a minimum differential pressure of 0.05MPa. Second, the trap installation The trap should be close and thermal equipment installed in the condensate row of hot equipment and piping at the exit. Also install a bypass pipe, rinse pipe, bleed, check the pipe, check valves, filters and other accessories (see Figure 1) Note ① The Third, the trap maintenance 1 trap in each class should be carried out an inspection tour to view the work of the traps every two weeks to conduct a comprehensive inspection. Check to take to listen to: listen to stick the top of the shell of the trap, listen to the floats, the sound of the hanging tube, the float and the valve action; touch: touch the surface temperature of the return pipe is too hot, the phenomenon of channeling gas not hot trap does not move; to see: the test valve to open the hydrophobic device to see the drainage of water does not contain steam or less carbonated qualified. 2 traps each year degree to a repair and calibration, repair and calibration sequence is as follows: (1) the cut-off valve 2 is shut, open the stop valve 6, open the trap cover, check the floats, hanging tube, float, valve seats, valve hole, lever, check valves, valves and other components for damage , wear, clogging. Discovery of the damage cleaning, grinding or replacement. (2) Repair is completed, open the stop valve, close the stop valve. After assembly, pressure test, check the trap strength and sealing performance. (3) in the trap calibration stage, the analog calibration of the trap to run in the selected operating conditions, check the sparse amount of water leakage. Note ①: trap with a filter may no longer installed filters, from time to install the check valve when the condensate after the trap into the open tank.