In terms of factory safety in production, explosion-proof measures are the most important. General explosion-proof types are divided into explosion-proof type, intrinsically safe type (abbreviated as intrinsically safe type), increased safety type, etc. Among them, the explosion-proof type and the intrinsically safe type are the two most common explosion-proof types in liquid level instruments.So, what does flameproof and intrinsically safe mean?What are the essential differences between the two?Intrinsically safeIntrinsically safe explosion protection belongs to the classification of special explosion-proof instruments and equipment for underground working conditions in coal mines. For national standards, see GB 3836.4-2010.The characteristic of intrinsically safe instruments is that all internal circuits are intrinsically safe circuits, that is, the electric sparks and thermal effects produced by the equipment under normal operation or fault conditions within the normal range cannot ignite the circuit and produce explosive effects.Furthermore, it is said that intrinsically safe equipment does not rely on the explosion-proof of the casing or filling, but the energy of the electric spark and thermal effect generated by its circuit under normal use or failure does not exceed 0.28mJ, which means that the gas concentration is only the minimum ignition energy Of 8.5%.The intrinsic safety of intrinsically safe explosion-proof equipment and related equipment is generally divided into ia and ib. Ia represents electrical equipment that cannot be ignited when one fault produces any combination of two faults. Ib refers to intrinsically safe equipment that fails to cause an ignition effect under fault conditions when the equipment is working normally.Explosion-proofExplosion-proof and explosion-proof means that all explosive gases and other mixtures that may be ignited inside the equipment are enclosed in a shell, and the shell is not affected by any joint surfaces or structural gaps. The combustible mixture will explode in the shell, during which the shell will not be damaged, nor will it cause an explosive ignition environment formed by one or more gases or vapors on the outside. For national standards, see GB 3836.2. According to the allowed explosive gas environment type, the flameproof type “d” is divided into Class I, IIA, IIB and IIC.The symbol of the explosion-proof type is “D”, which can also evolve into increased safety type “E”, oil-filled type “O”, sand-filled type “Q”, pouring sealed type “M”, and composite type.Most of the liquid level meters independently developed and produced by Huikeda are intrinsically safe and explosion-proof configurations in accordance with national standards. The product has passed the dual explosion-proof certification (Exia; IICT6 and ExdIIC T6) of intrinsic safety and flameproof type, and can be widely used in flammable and explosive places of various petrochemical enterprises such as PetroChina and Sinopec. The explosion-proof grade is the highest in the industry and is well received by users.Huikeda explosion-proof tuning fork liquid level switch
In the process of R&D, Huikeda effectively controls and manages the entire process of product R&D. All products must be tested and certified by a third party before they are officially put into production. Product quality must go through multiple processes. Strict audit and control, stable and reliable performance.
Post time: 21-09-21