Full details of the trap and the correct selection method

The scope and selection method of steam trap:
The steam trap can quickly eliminate the generated condensate; prevent steam leakage, prevent the use of steam equipment, prevent corrosion of steam from using the inside of the equipment, and prevent damage to the steam equipment.
The structure and principle of various types of steam traps are different. The type of trap should be distinguished. The pressure difference between the inlet and outlet of the steam trap should be determined according to the actual working conditions, and then the amount of condensate that may be generated during normal operation of the steam heating equipment. Multiply by the selection correction factor K and then select according to the displacement of the steam trap.
In the condensate recovery system, if the condensed water is recovered by the working back pressure, a steam trap with a high back pressure ratio (such as a mechanical steam trap) should be used; when the condensate is not required to be accumulated in the steam equipment, Use a steam trap that can continuously discharge saturated condensate (such as a float steam trap); in a condensate recovery system, when the steam equipment requires both discharge of saturated condensate and timely elimination of non-condensable gas, it should be used. A steam trap that can discharge saturated water in parallel with the exhaust device or a steam trap that has both drainage and exhaust functions (such as a thermostatic steam trap); when the working pressure of the steam equipment fluctuates frequently When using steam traps that do not require adjustment of working pressure.
The nominal pressure and operating temperature of the steam trap should be greater than or equal to the maximum working pressure and maximum operating temperature of the steam line and the steam equipment.
When the steam drain of a steam trap cannot meet the requirements, several steam traps can be installed in parallel.
A bypass pipe and a bypass valve may be provided for inspection.
Precautions for the trap during installation
 In general, traps are installed at a location below the condensate drain. However, if you want to install the trap above the condensate drain, install a lift connector in front of the trap so that the condensate can flow smoothly into the trap. Lifting joints: Also known as "suction lifting joints". When the condensed water discharge portion is low, it can suck the condensed water to a high place and lead to the front;
The pipe diameter used to recover the condensate discharged from the trap should have a certain margin, at least to prevent the impact of steam hammer or pressure loss. In addition, when connecting the recovery pipe to a plurality of water collection pipes (return pipes), a certain inflow angle should be created to facilitate the flow of the condensed water;
When the condensed water is discharged to the drain, if the drain pipe is directly inserted into the water, the condensed water may be splashed. If it is necessary to be flooded, in order to prevent the water in the drain from flowing back to the trap when the steam stops, the hole should be opened in the drain pipe or a vacuum regulating valve should be installed;
In the early stage of ventilation and faster flow rate, it can effectively collect condensed water, which helps the trap to work better. If the condensate collecting device is not designed, it is prone to the phenomenon that the condensed water is not discharged, the garbage and the scale block the inlet;
 For condensate lines with different pressure conditions, the condensate recovery pipe should be designed for each different pressure or recycled after installation. Once the high-pressure condensate flows into the low-pressure recovery pipe, the condensed water will evaporate again due to the temperature difference of the condensed water, thereby causing adverse effects such as noise and steam hammer.
Application and application of traps
The steam trap products are mainly used in steam pipe networks and equipment. It can automatically discharge condensed water, air and other non-condensable gases, and block water vapor leakage. Here we mainly introduce the product selection methods of steam traps, as follows:
The structure and principle of various types of steam traps are different. The type of trap should be distinguished. The pressure difference between the inlet and outlet of the steam trap should be determined according to the actual working conditions, and then the amount of condensate that may be generated during normal operation of the steam heating equipment. Multiply by the selection correction factor K and then select according to the displacement of the steam trap;
In the condensate recovery system, if the condensate is recovered by the working back pressure, a steam trap with a higher back pressure ratio should be used. When the condensate is not required to be stored in the steam equipment, a steam trap that continuously discharges the saturated condensate should be used. In the condensate recovery system, when the steam equipment requires both discharge of saturated condensate and the timely elimination of non-condensable gas, a steam trap capable of discharging saturated water and a drain device in parallel with the exhaust device or a drain may be used. Steam trap with two functions of exhausting. When the working pressure of the steam equipment fluctuates frequently, the steam trap that does not need to adjust the working pressure should be selected; the nominal pressure and working temperature of the steam trap should be greater than or equal to the maximum working pressure and the maximum working temperature of the steam pipeline and the steam equipment.
When a steam trap has a drainage capacity that does not meet the requirements, several steam traps can be installed in parallel.
Steam trap installation and maintenance
First, the trap installation
1. Installation Precautions
A) Clean the pipeline equipment before installation to remove impurities to avoid blockage.
B) Steam traps should be installed where they are easy to access and arranged as much as possible to facilitate management.
C) Steam traps should be installed separately for each heating device.
D) The bypass pipe should not be installed below the steam trap.
E) When installing, pay attention to the direction of the arrow on the valve body and the direction of the medium flow in the pipe.
F steam trap inlet box outlet pipe, along the direction of the medium flow should have a downward slope of 5-10%, and the nominal passage of the pipeline is not less than the nominal passage of the steam trap.
G) When the steam drain of a steam trap cannot meet the requirements, several steam traps can be installed in parallel.
H) For use where freezing may occur, antifreeze measures must be taken.
Second, the maintenance of the trap
1. The trap should be patrolled once per shift to check the operation of the trap, and a full inspection should be performed every half month. Check and take: listen to the top of the trap on the trap, listen to the sound of the buoy, the bucket, the float, the valve action; touch: touch the surface temperature of the water pipe by hand, too hot to have a suffocating phenomenon. If it is not hot, the trap will not operate; see: open the inspection valve of the drain to see the drainage, the water does not contain steam or less steam is qualified.
2. The trap is repaired and verified once a year. The sequence of repair and verification is as follows:
A) Close the shut-off valve 2, open the shut-off valve 6, disassemble the trap cover, and check the float, the bucket, the float, the valve seat, the valve hole, the lever, the check valve, the valve plate, etc., with or without damage. Worn and clogged. Damage found for cleaning, grinding or replacement.
B) After the repair is completed, open the shutoff valve 2 and close the shutoff valve 6. After assembly, perform a hydrostatic test to check the strength and sealing performance of the trap.
C) On the trap calibration table, perform an analog calibration to allow the trap to operate under selected conditions to check for trapped and leaked quantities.
Note 1: The trap with filter can no longer be equipped with a filter. When the condensate behind the trap enters the open tank, the check valve is not installed.