Install the bimetallic temperature need to pay attention to what time?

As contact measurement in situ show that the temperature of the instrument & ndash; Bimetallic thermometer is most frequently used in industrial production activities, it is a kind of field detection instrument suitable for measurement of low temperature, can be directly measured - all kinds of production process 50℃- + 500 ℃ within the scope of the liquid, steam and gas medium temperature. Bimetallic thermometer is based on the ring around the made of bent bimetallic strip. End is heated expands, turns the pointer, the pointer can be on a circular dividing scale to indicate the temperature. Many users in the use of bimetallic temperature time, installation without deep understanding of it, all feel just installed. In fact, its measuring accuracy is determined by installing a big aspects. We summarize the installation bimetallic temperature need to be aware of time. 1, the bimetallic thermometer should be installed on the straight pipe, the installation requirements of minimum diameter generally above DN80, expanding tube length should be not less than 250 mm. 2, in bend pipe installation, the pipe diameter should not less than DN40, and contact with the tube flow into upstream. 3, also can be installed in vertical or inclined 45 & deg; Installation, tilted 45 & deg; When installation, should contact with the tube flow into a counter-current. 4, the appropriate installation height of 1. 2 to 1. 5m。 More than 2. 0 m best equipped with straight ladder into activity when the platform. For ease of maintenance, the minimum distance platform should not be less than 300 mm. 5, process piping with branch, when installation, pay special attention to installation positions and process flow, and try to avoid installed in the valve, elbow and pipe and equipment position near the corner, appendix. 6, bimetallic thermometer with a protection casing with heat transfer and heat loss, in order to reduce the measurement error, should have enough: (insert depth 1) For measuring pipeline fluid temperature at the centre of the thermometer, generally should be measuring end is inserted into the pipe center ( Vertical or inclined installation) 。 As the current body of pipe diameter is 200 mm, the insert depth should choose 100 mm; （ 2) For high temperature and high pressure and high velocity of temperature measurement, Such as main steam temperature) , in order to reduce cases of fluid resistance and prevent cases break under the action of a fluid, can be taken to protect shallow plug-in mode or use heat pipe. Shallow plug-in protection casing, and its depth into the steam pipe should be no less than 75 mm; Hot shell standard insert depth of 100 mm; （ 3) When measuring the original insertion depth of more than 1 m, shall be installed vertically, as far as possible or add racks and protect casing.