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| Knowledge about pressure gauge anticorrosion |
| 2011-8-15 9:29:53 |
1. 1 ～ 2 年，对一般的腐蚀介质，则可以选作氨压力表 ，但是在安装的时侯，导压管要短，缓冲盘管改用缓冲罐，用来防止杂质堵塞。 If the stainless steel spring tube can withstand corrosion for 1 to 2 years, for general corrosive media, an ammonia pressure gauge can be selected, but when installing, the pressure guiding tube should be short, and the buffer coil should be replaced with a buffer tank to prevent impurities. Clogged.
如果介质对不锈钢或者铜有腐蚀作用，可以将缓冲罐改用成隔离罐，加入耐腐蚀的隔离液。 2. If the medium has a corrosive effect on stainless steel or copper, you can change the buffer tank to an isolation tank and add a corrosion-resistant isolation liquid. The type of isolation liquid can be selected according to the nature of the measured medium, but it is generally required to use it for more than half a year without deterioration. If ordinary isolation liquid is not applicable, you can use chlorofluorocarbon oil instead of isolation liquid, but it is very expensive, so you need to make the isolation tank smaller, and you must recycle the chlorofluorocarbon for reuse when disassembling.
可采用隔膜式压力表 ，目前有钼 2 钛和钽片，膜片与弹道管之间用甲基硅油传送压力，最小量程可做到 0 ～ 100kPa ，如果膜片材料不够耐腐，则可以加一层F46聚全氟乙丙烯膜片，但是这样会影响仪表灵敏，有时仪表的灵敏底有还会有所降低。 3. Diaphragm pressure gauges can be used. At present, there are molybdenum 2 titanium and tantalum plates. The pressure between the diaphragm and the ballistic tube is transmitted by methyl silicone oil. The minimum range can be 0 to 100kPa . If the diaphragm material is not resistant enough, then You can add a layer of F46 polyperfluoroethylene propylene membrane, but this will affect the sensitivity of the instrument, and sometimes the sensitivity of the instrument will be reduced. F46 作隔离膜片，但是要注意介质的渗透性，传递液也可以选用氟氯油，则可以起到双重隔离作用。 F46 can also be directly used as the isolation diaphragm, but pay attention to the permeability of the medium, and the transmission fluid can also use chlorofluoro oil, which can play a dual isolation role.