Explosion-proof solenoid valves encapsulate all parts of equipment that may ignite explosive gas mixtures in an enclosure. Its shell can withstand the internal explosion of the combustible mixture entering the shell through any joint surface or structural gap of the shell without damage, without causing the ignition of an external explosive environment formed by one or more gases or vapors, and without placing the possibility of Parts that generate sparks, arcs and dangerous temperatures enter the flameproof enclosure, which isolates the interior of the equipment from the surrounding environment. There are gaps in the flameproof enclosure where explosive gas mixtures may be present due to breathing and gas penetration of electrical equipment.
The coiled shell of the explosion-proof solenoid valve not only has the explosion-proof effect of bearing the gas explosion pressure, but also blocks the energy transmission of the gas explosion, and has higher safety performance. It is a series of special solenoid valves, specially designed for conveying flammable and explosive media or explosion-hazardous places. For different environments and fluids, solenoid valves with different explosion-proof grades should be selected. Explosion-proof solenoid valves have a closed chamber with through holes open at various locations. Each hole leads to a different tubing. There is a valve in the middle of the chamber and two electromagnets on either side. Which side will the valve body be attracted to when the magnet coil is energized? By controlling the movement of the valve body, different oil drain holes can be blocked or leaked. The oil inlet hole is always open, the hydraulic oil enters different oil discharge pipes, the oil pressure pushes the cylinder piston, the piston drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current to the electromagnet.
The selection of explosion-proof solenoid valves should first follow the four principles of safety, reliability, applicability and economy, and then according to the field conditions from six aspects: pipeline parameters, fluid parameters, pressure parameters, electrical parameters, action methods, and special requirements to make a selection. Select according to pipeline parameters Select the diameter specification (ie DN) and interface mode of the solenoid valve according to the pipeline parameters: The diameter (DN) should be determined according to the inner diameter or flow requirements of the on-site pipeline. Interface mode: Generally, a flange interface is used when it is greater than DN50, and DN50 can be freely selected when it is less than or equal to DN50. Choose according to fluid parameters: choose the material and temperature group of the solenoid valve according to fluid parameters 1. Corrosive fluid: choose corrosion-resistant solenoid valve, all stainless steel; edible ultra-clean fluid: choose food-grade stainless steel solenoid valve. 2. High-temperature fluid: The solenoid valve adopts high temperature resistant electrical materials and sealing materials, and adopts a piston structure. 3. Fluid state: gas state, liquid state, or mixed state, especially when the order diameter is larger than DN25. 4. Fluid viscosity: generally lower than 50cst, can be selected arbitrarily. If this value is exceeded, select a high viscosity solenoid valve.
