Electromagnetic flowmeter protection grade standard
Electromagnetic flowmeter is composed of electromagnetic flow sensor and electromagnetic flow converter. The main components are measuring tube, electrode, excitation coil, iron core and yoke, housing. The measuring tube of the sensor is a short non-magnetic alloy tube lined with insulating material.
Electromagnetic flowmeter is composed of electromagnetic flow sensor and electromagnetic flow converter. The main components are measuring tube, electrode, excitation coil, iron core and yoke, housing. The measuring tube of the sensor is a short non-magnetic alloy tube lined with insulating material. In addition to measuring the volume flow of general conductive liquids, electromagnetic flowmeters can also be used to measure the volume flow of strong corrosive liquids such as strong acids and alkalis and uniform liquid-solid two-phase suspended liquids such as mud, pulp, and paper pulp. Widely used in petroleum, chemical industry, metallurgy, textile, paper making, environmental protection, food and other industrial departments and municipal management, water conservancy construction, river dredging and other fields of flow measurement, is a high-precision, highly reliable and long service life flow meter. The measured body should not contain more ferromagnetic substances or bubbles, and the corresponding pressure grade, lining material, electrode material and meter structure form should be selected according to the temperature, pressure, corrosion, wear and other characteristics of the measured body.
According to the national standard GB4208-84 and the International Electrotechnical Commission standard IEC529-76, the standard for the protection level of electrical and electrical products is:
A, IP65: For the anti-water spray type, the electromagnetic flowmeter sensor housing allows the faucet to spray water from any direction of the electromagnetic flowmeter sensor, the water pressure is 30Kpa, the water yield is 12.5L/S, and the distance is 3 meters.
B, IP67: Electromagnetic flowmeter sensor can be used for a short time immersed in water.
C, IP68: for the submersible type, under a certain pressure is suitable for long-term work in water or underground, at this time the sensor and the display part of the electromagnetic flowmeter are separated, to make a split electromagnetic flowmeter, but must emphasize the protection level requirements of the electromagnetic flowmeter.
Under normal circumstances, the protection level should be selected according to the actual situation, and the sensor installed above the ground should be selected IP65 and IP67. The sensor is required to be installed below the ground and is often flooded. IP68 should be selected. In any case, the display part of the electromagnetic flowmeter cannot be used or entered into water, which will cause damage to the electromagnetic flowmeter.