DFB-20/10 mining explosion-proof solenoid valve with high response and high pressure resistance for underground pneumatic control

Description :

  DFB-20/10 mining explosion-proof solenoid valve is a pneumatic control component designed specifically for harsh environments in coal mines and non coal mines underground. This device mainly solves the control problem of remote automatic disconnection and connection of compressed air pipelines or hydraulic systems in explosive gas environments containing gas, coal dust, etc. As the key executive mechanism of the mine safety monitoring system, it can act quickly after receiving the electrical signal to realize the on-off control of the gas path. It is widely used in the spray dust suppression system of the underground mining face, the control circuit of the air winch and various safety protection devices to ensure the intrinsically safe operation under dangerous conditions.

  The DFB-20/10 mining explosion-proof solenoid valve is strictly manufactured in accordance with the national mining product safety standards. The shell is made of high-strength aluminum alloy or stainless steel material, and has undergone precision casting and anti-corrosion treatment, possessing excellent impact resistance and corrosion resistance. The core explosion-proof structure adopts an explosion-proof design, effectively isolating the electric sparks that may be generated by the internal electromagnetic coil from the external explosive environment. The typical working pressure range covers 0.4MPa to 0.8MPa, suitable for common pressure fluctuations in mine ventilation systems. Electrical interfaces are usually sealed with an introduction device, with a protection level of IP54 or above, ensuring long-term stable operation in humid and dusty underground environments, and complying with Exd I Mb and other mining explosion-proof certification requirements.

  When selecting the DFB-20/10 mining explosion-proof solenoid valve, it is important to confirm the type of medium (compressed air, water, or emulsion) and working pressure parameters on site to ensure compatibility with the pipeline system. This model is suitable for fixed or mobile mining equipment that requires rapid response and high safety requirements. Unlike ordinary industrial solenoid valves, mining explosion-proof solenoid valves must have effective coal safety markings (MA certification), and are strictly prohibited from being used as substitutes in ordinary industrial environments without explosion-proof requirements. They are also not suitable for highly corrosive chemical media or extreme environments with non explosive but high temperature exceeding standards. When purchasing, it is necessary to verify whether the voltage level (such as AC127V, DC24V, etc.) is consistent with the underground control power supply.

  The installation of DFB-20/10 mining explosion-proof solenoid valve should be fixed vertically or horizontally in a position that is easy to maintain. It is important to note that the inlet and outlet directions should not be reversed. It is recommended to install an oil-water separator in front of the valve to extend its service life. In daily maintenance, it is necessary to regularly check whether there is any leakage on the sealing surface of the valve body, clean the dust and oil stains at the pilot head, and prevent the valve core from malfunctioning due to impurities jamming. Common faults include coil burnout or valve core jamming. When troubleshooting, it is necessary to first disconnect the power and check the coil resistance, and then check the purity of the gas source. When it is not in use for a long time, the accumulated water in the valve should be drained and rust proof grease should be applied to ensure that the action is sensitive and reliable when it is put back into use.

AfterSalesService :