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Industry Information
Two-needle pressure gauges run for one level of maintenance after one year
2012-3-2 9:28:04

主要适用于机车车辆上用来测量液压系统或储气缸的压力;亦可用于对铜合金钎焊无腐蚀性,非结品和凝固的种介质的压力测量。 The double needle pressure gauge is mainly suitable for measuring the pressure of hydraulic systems or storage cylinders on rolling stock; it can also be used for non-corrosive, non-structural and solidified medium pressure measurement of copper alloy brazing.
The meter is composed of two independent measuring systems and indicating devices.
The working principle of the meter is based on the elastic deformation of the elastic element (spring tube in the measurement system). That is, under the action of the measured pressure, the ends of the two spring tubes are respectively caused to have corresponding displacements. With the help of the pull rod, they are driven by the gear transmission mechanism and enlarged. The red and black pointers on the fixed gear shaft chase the two The measured values are indicated on the dials respectively;


The double needle pressure gauge is mainly suitable for measuring the pressure of hydraulic systems or storage cylinders on rolling stock; it can also be used for non-corrosive, non-structural and solidified medium pressure measurement of copper alloy brazing. The meter can measure two pressures that are the same or different (the difference between the two should generally not be greater than 1/3 of the limit value on the scale range). Main technical indicators: 1. Accuracy level: 1.5 2. Measuring range: 0 ~ 1000; 1200 *; 1600; 2500kPa 3. Operating environment conditions: 5 ~ 60 ℃; relative humidity ≤80% 4. Temperature influence: not more than 0.4 % / 10 ℃ (The use temperature deviates from 20 ± 5 ℃) 5. Weight: 0.7Kg
Structural principle: The instrument consists of two sets of independent measurement systems and indicating devices.
The working principle of the instrument is based on the elastic deformation of the elastic element (spring tube in the measurement system). That is, under the action of the measured pressure, the ends of the two spring tubes are respectively caused to have corresponding displacements. With the help of the pull rod, the gear transmission mechanism is used to drive and magnify the two. The measured values are indicated on the dials respectively; the pressure gauge of the two-needle pressure gauge is composed of two independent measuring systems and indicating devices. 主要适用于机车车辆上用来测量液压系统或储气缸的压力;亦可用于对铜合金钎焊无腐蚀性,非结品和凝固的种介质的压力测量。 The double needle pressure gauge is mainly suitable for measuring the pressure of hydraulic systems or storage cylinders on rolling stock; it can also be used for non-corrosive, non-structural and solidified medium pressure measurement of copper alloy brazing. The meter can measure two same or different pressures at the same time. The working principle of the meter is based on the elastic deformation of the elastic element (spring tube in the measurement system). That is, under the action of the measured pressure, the ends of the two spring tubes are respectively caused to have corresponding displacements. With the help of the pull rod, the gear transmission mechanism is used to drive and magnify the two. The measured values are indicated on the dials; daily maintenance and maintenance of the pressure gauge. The two-needle pressure gauge is operated for three months to perform a first-level maintenance. Its contents and requirements are as follows: 1. Check the tee plug and water Elbow fittings to eliminate leaks. 2. Check whether the pressure gauge can return to zero. 3. Check and flush the water trap to ensure smooth flow.


运行至一年后进行一次二级保养,其内容和要求如下: The two-needle pressure gauge is operated once a year for secondary maintenance. Its contents and requirements are as follows:
1. Remove the pressure gauge, send it to the measurement department for verification and seal it.
2. Disassemble and check the water storage elbow, and the wire buckle should be intact.
3. Disassemble and check the three-way cock, grind the sealing surface to ensure tightness and not leak, and its connection screw should be intact.
4, water storage elbow, tee plug to remove rust, paint.
Replacement of Pressure Gauges When pressure gauges are found to be out of alignment during operation, they must be replaced in a timely manner.
The working steps are as follows:
1. The pressure gauge to be replaced must be a lead seal that has passed the verification of the metrology department. The pressure gauge within the validity period of the verification or a new gauge with a certificate of delivery.
2. Before changing the meter, the three-way cock must be screwed to the position where the pressure gauge is flushed, and the dirt in the water storage elbow is flushed clean.
3. Turn the three-way cock to the position where the water storage elbow stores water. Remove the old gauge with a wrench and replace it with a new pressure gauge.
4. Turn the three-way cock to the normal working position, and put the new watch into operation.