Explosion-proof induction electric contact pressure gauge

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Explosion-proof induction electric contact pressure gauge is mainly used in nuclear power, chemical …

YXG - 152 - b seriesExplosion-proof induction electric contact pressure gaugeContact form for inductive proximity switch, when the pressure is zero, the maximum contact output is less than 1 ma off state signal, the lower contact output for more than 3 ma tong state signals.Signal when the pressure rose arrived at lower limit value, the lower limit of the needle into the lower limit of the aperture of induction switch, the lower limit of induction electric switch state changes, the lower contact output immediately jumped into off state signal of less than 1 ma.When stress continues to rise, the lower signal needle retention, keep contact signal.When pressure rise reach the ceiling, ceiling signal pin is out of upper limit induction switch, the cracks in the ceiling induction switch electrical state change, limit contact output immediately jumped into greater than 3 ma tong state signals.Keep pressure continues to rise, signal.When the pressure drop is the highest limit, limit signals and put back to the ceiling in the aperture of induction switch, limit induction switch is returned to the original state, make the limit contact output jump back to less than the off state signal of lmA.Keep pressure continues to fall, signal.When pressure drop to lower limit, lower limit signal pin was out of the lower limit of induction switch on gap, the lower the induction switch is returned to the original state, make the minimum contact output jump back to the state signal of greater than 3 ma.

Second, the structure principle:

1, YXG - 152 - b series explosion-proof induction electric contact pressure gauge measurement system consists of spring tube, rod and gear transmission mechanism, value parts.Of the measured medium pressure acting on the spring pipe, make its produce a shift in the free end, will be amplified by rod to a gear transmission mechanism, and go into the rotation of the pointer, on the circle indicates the measured pressure value.

2, spare the appropriate peripheral circuit connection, can send out alarm signal or open, stop the action of pressure control, the system pressure control within the required range.

3, YXG - 152 - b series explosion-proof induction contact pressure gauge is intrinsically safe instrument, when its associated with the device context, can constitute a safety explosion protection system.

4, is dedicated to certain explosive dangerous location instrument, this table has on the pressure of the fluid parameters in process detection, automatic control, automatic alarm, and other functions.

Three, the main features:
1, Ⅱ type flameproof explosion-proof category for class B T4 group, the logo for Exd Ⅱ BT4.
2, is suitable in places with explosion danger in to measure of crystals, solidification of explosive mixture of all kinds of explosive medium pressure.
3, with a corresponding explosion-proof performance or take corresponding safety measures the electrical devices (such as relay and contactor, etc.), it can realize the automatic control for the controlled system and a letter (alarm).

Four, the technical parameters:

1, the precision level: 1.5;

2, measuring range: 0 ~ 0.1;0 ~ 0.16;0 ~ 0.25;0 ~ 0.4;0 ~ 0.6;0 ~ 1;0 ~ 1.6;0 ~ 2.5;0 ~ 4;0 ~ 6;0 ~ 10;0 ~ 16;0 ~ 25;0 ~ 40;0 ~ 60;

-0.1~0；-0.1～0.06；-0.1～0.15；-0.1~0.3；-0.1～0.5：-0.1~0.9：-0.1～1.5；-0.1～2.4MPa；

3, control mode: inductive current switch (the introduction of Germany "p + f" company devices);

4, working voltage: 8 v DC;

5, working current, state 3 ma, off state 1 or less, or ma;

6, two limit zui small interval range: 2.5% of full scale.

7, working environment temperature: - 10 ~ 55 ℃;

8, weight: 1.5 kg.

Five, the installation of pressure gauge:

1, the installation position of pressure gauge should meet the requirements of the install state dial generally should not be placed, the discretion of the installation position should facilitate staff observations.

2, pressure gauge installed in the distance and pressure measuring point should be short, as far as possible to ensure the good sealing, can't leak phenomenon.

3, the installation of pressure gauge should be front-end buffer;To facilitate inspection, should be equipped with a shut-off valve at the bottom of the instrument;When the medium is dirty or pulse pressure, the filter can be used, buffer and regulated gas, etc.

Six, regular maintenance/repair:

1, after a period of use, and pressure, pressure gauge movement deformation and wear, hard to avoid can appear some pressure gauge can produce all kinds of errors and failures.In order to guarantee the accuracy of its original without distortion, dissemination should be replaced in a timely manner, to ensure that the correct, safe and reliable.

2, pressure gauges need to clean them regularly.Because the interior of the pressure gauge is not clean, will increase the wear parts, thus affecting its normal work, serious can make the pressure gauge failure, scrap.

3, the pressure on the installation of pressure gauge, according to the regulations of JJG52-1999, its verification period is generally not more than half a year.

4 and pressure medium to large fluctuations, used frequently, the accuracy of the demand is higher, and the more strict security factors, according to the specific circumstances will verification cycle shorten appropriately.

Seven, use notice:

1, when using the environment temperature for - 40 ~ 70 ℃, relative humidity is not more than 80%, such as deviation from normal use temperature 20 ℃, the temperature must be included in the additional error.

2, must be installed vertically, and strive to maintain the same level with measuring points, such as the difference between high included in the additional error caused by the liquid column, but don't have to consider when measuring gas.When installation will watch case vent at the back of the jam, lest affect explosion-proof performance.

3, when using normal use of the measuring range: no more than 3/4 of the measurement limit under static pressure, under the volatility should not be more than two-thirds of the measurement limit.In the above two kinds of low pressure situation under large pressure gauge measuring zui should not less than a third of the lower limit, vacuum parts all use measurement of a vacuum.

4, such as when using vacuum gauge pressure failure or internal parts loose, should not work properly when fault repairs, maintenance or production manufacturer.

5, when using, should avoid vibration and impact, so as to avoid damage.

Eight, specifications:

Nine,Design and selection and ordering information: 
1, when ordering please indicate the type, name, measuring range, joint thread size, precision grade. 
2, if you have special requirements, when ordering, please specify. 
After-sales service commitment:
1, sold by my companyPressure gauge seriesProduct quality problem within 12 months, responsible for free maintenance.
2, the warranty period, any quality problems such as the products of our company, my company is responsible for free repair or replacement.
3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.
4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.
5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.