The gas pressure regulating valve is a very important component installed between the boiler air source and the burner. Its function is to reduce and adjust the higher pressure and unstable gas source to a smaller and relatively stable gas source gas pressure regulator. Valve working principle Komatsu Parts,Komatsu Spare Parts,Genuine Komatsu Parts,High Quality Komatsu Parts JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.stszcmparts.com
Overview:
The gas pressure regulating valve is a very important component installed between the boiler air source and the burner. Its function is to reduce and adjust the higher pressure and unstable gas source into a smaller and relatively stable gas source for combustion. The device provides suitable energy and has a cut-off protection function to provide a safe use of gas. It consists of three major components: the pilot, the actuator, and the cut-off protector. The quality of the gas pressure regulating valve directly affects the ignition and operation of the burner.
First, the pilot:
The pilot is located on the pressure adjustment side of the upper part of the valve body. It is connected to the upstream and downstream pressure pipe, filter (air intake), insulation film, adjusting screw and spring, connecting rod, valve core, valve seat, etc. Institutional composition. The outlet air pressure from the downstream of the valve is applied to the side of the isolation membrane through the pressure tube, and the other side of the membrane is biased by the spring and the adjusting member. When the pressure is balanced on both sides, the valve core is in a relatively static position. If the valve outlet air pressure is greater than the adjustment spring force, due to the outlet air pressure, the film and the connecting rod are led to the valve core to eject outward, thereby reducing the distance between the valve core and the valve seat, and reducing the control air source pressure (load pressure). [Exit air pressure increases -> Control air pressure decreases] If the valve outlet air pressure is less than the adjustment spring force, due to the action of the spring, the diaphragm and the connecting rod are guided to the valve core to retract inward, and the valve core and the valve seat are enlarged. Distance, increase the control of the source pressure. [Exit air pressure decreases -> Control air pressure increase] This control air source pressure can directly lead to the action of the main spool of the pressure regulating valve, thus playing a command role. In addition, a filter screen is installed between the intake pressure pipe and the valve seat to filter out impurities in the intake air. A check valve is installed in the control chamber to prevent the outlet air pressure from laterally controlling the gas source side. It is also equipped with a dowel for changing the pressing method. It is built-in or external. When it is built in: remove the stud, (remove the main adjusting valve plug to see two dowels) and plug the outlet air pressure pipe connection with wire. .
Second, the implementation (adjustment):
The actuator is located on the other side of the upper pilot of the valve. It consists of a control air supply pressure pipe, an isolation diaphragm, a spring, a connecting rod, a main regulating valve core, and a valve seat. The control air pressure is applied to one side of the membrane in cooperation with the spring, and the other side of the membrane is supplied by the outlet air pressure downstream of the valve. When the pressure is balanced on both sides, the main spool is adjusted to be in a relatively rest position.
If the control air pressure and the spring work together to be greater than the outlet air pressure, due to the control of the air pressure, the film and the connecting rod are guided to the main regulating valve core to lift up, thereby enhancing the ventilation of the valve. [Control air pressure increases -> main control spool lifts up -> valve airflow increases]
If the control air pressure and the spring work together less than the outlet air pressure, due to the action of the outlet air pressure, the film and the connecting rod are guided to the main regulating valve core to fall, thereby reducing the gas flux of the valve. [Control air pressure reduction -> main control spool to fall -> valve gas flux reduction]
Adjustment process:
The outlet air pressure increases -> control air pressure decreases -> valve ventilation decreases -> outlet air pressure decreases.
The outlet air pressure is reduced -> the control air pressure is increased -> the valve ventilation is increased -> the outlet air pressure is increased.
In summary, the entire adjustment process can achieve the effect of automatically adjusting the outlet pressure.
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Gas pressure regulating valve working principle