General Equipment Co., Ltd. Jiangsu Lan valve with coal safety certificate explosion-proof valve control box products dI and dIIBT4 two kinds, dI applicable to non-coal mining face; dIIBT4 used in factories for the environment IIA, IIB grade T1 ~ T4 group gas mixture. Explosion Point 1) control box requires proof of an explosive mixture inside the cavity when the explosion, flameproof enclosure is not damaged and can not guarantee the internal flame control box casing joints caused by an explosion outside an explosive mixture. 2) The component parts of the flameproof enclosure, after finishing have been GB3836.2-2010 provisions 1.0MPa, which lasted no less than 10S hydrostatic test pass, in order to ensure maximum internal explosion can withstand pressure without damage. 3) The number of bolts fastening connection flameproof enclosure indispensable bolt screwed into the depth of 1.2 to 1.5 times the diameter to withstand the explosion pressure. Under each bolt and nut are spring washers to prevent loosening themselves. 4) control box of the box, cover, junction box cover, transparent parts, terminals, cables are proof seals and other parts, which must not bump proof surface, without scratches and other defects affect the explosion effect. 5) junction box inlet and outlet has rings (see Figure 3), which the cable outer diameter to be consistent with the smallest ring diameter, in order to ensure that after the press-fit compression nut, so between the seal and the seals and the cable and wiring no gap between the cassette small electric head, otherwise it can not be flameproof.江苏兰 valve General Equipment Co., Ltd. of KXBC series flameproof electric valve control box structure design Open the door electric head, with the DCS system interface functions converge in the electrical properties of the design. Set the stroke control, remote / on switching control, making it practical function even better. 11 confirmed debugging phase sequence: the first use of electric devices must confirm the phase sequence proof electric head, manual valve to the middle position and brought the main power supply to run in the opening direction by "open valve" button, valves, such as contrast, the exchange UVW any two phases. 2 travel stops and adjust the degree of opening: phase sequence after confirmation of the electrical device can be adjusted stroke limiter and electric head makes opening instructions, see Instruction Manual electrical devices. 3 4-20mA signal output adjustment: adjust travel stop in place and can operate reliably after the 4-20mA output signal can be adjusted. 3.1 electric valve is fully closed in place, according to the requirements of the electrical device manual potentiometer hang the multimeter to the 2V DC voltage profile, measuring between 11 and 12 terminal voltage control module absolute value increases with the open valve, close the valve reduced, otherwise the module on line 11, 13 between the terminals reversed. Electric will be adjusted again after the valve is fully closed low-end adjustment potentiometer control module, the control box output exactly 4mA. 3.2 electric valve fully open place, adjust the potentiometer to adjust the high-end control module, the control box output exactly 20mA. Wenzhou electric head, electric head, 江苏兰 valve provided by 江苏兰 valve General Equipment Co.江苏兰 valve General Equipment Co., Ltd. (www.lanfa.cn) strong, credible, in Changzhou, Jiangsu regulating valve industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jiangsu Lan valve and you hand into the brilliant, for a better future!