Explosion-proof electric contact pressure gauge

YTX - 160 b / 100 b seriesExplosion-proof electric contact pressure gaugeBy the inspection organizations designated by the state for examination and approval of drawings and technical documents for production.Instrument by explosion-proof enclosure, measuring system, electric contact group, the control device and the outlet box, etc.In GB3836.1's 83 "explosive environment with explosion-proof electrical equipment general requirements and GB3836.2 83" explosive environment with explosion-proof electrical equipment flameproof electrical apparatus "d", "regulations and relevant standards for design, and through the inspection organizations designated by the state for examination and approval of drawings and technical documents for manufacturing.

Second, the working principle:

YTX - 160 b / 100 b series explosion-proof electric contact pressure gauge by explosion-proof enclosure, measuring system, electric contact group, the control device and the outlet box, etc.Instrument of flame-proof shell has the good explosion-proof performance, so in normal work process because of the influence of the sparks or electric arc, in addition to shell under internal explosive gas mixtures at once an explosion caused by the explosion pressure, and can effectively prevent the resulting heat well spread outward, but only inside the shell along the flame-proof tiny cracks in the joint surface slowly spread outward.At this time, the external moments to shell temperature has dropped below the ignition temperature of explosive gas mixture, it will not lead to explosive.

Instrument working principle is based on detecting element (bourdon tube) in measuring system of elastic deformation, through mechanical transmission to drive the electric contact contact in a group to produce the corresponding action (closed or disconnected) to make the pressure control system of circuit to connect or disconnect, so as to realize the purpose of automatic alarm and control instructions given.

Applications:

YTX - 160 b / 100 b series explosion-proof electric contact pressure gauge widely used in petroleum, chemical industry, metallurgy, power stations and other industrial department or mechanical and electrical equipment of form a complete set of measuring various fluid pressure explosion hazard.Usually, instrument with corresponding electrical devices (such as relay and contactor, etc.), used in the pressure (control) system to be measured can be automatically, control and alarm.

Four, 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).

Five, the technical parameters:

1, the precision level: 1.5;

2, the scope of scale: 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 ~ 0.06;0.1 ~ 0.15;0.1 ~ 0.3;0.1 ~ 0.5;0.1 ~ 0.9;0.1 ~ 1.5;0.1 ~ 2.4 MPa;

3, control mode: on, lower amble contact switch;

4, zui high working voltage, DC or AC 380 v, 220 v;

5, contact power: 10 va;

6, work location: vertical installation;

7, the environmental conditions of use: - 10 ~ 50 ℃, relative humidity is not more than 80%, and the explosive mixture belongs to Ⅱ class B under the T4 group, vibration and sharp pulse response instrument measured medium contact reliable action had no effect;

8, temperature effects: no greater than 0.4% / value for 10 ℃, set point is not greater than 0.6% / 10 ℃ (using the temperature deviation from 20 + / - 5 ℃);

9, dielectric strength: 50 hz sinusoidal ac 2000 v lasted a minute;

10, weight: 6 kg.

Sixth, 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.

Seven, 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.

Eight, use the matters needing attention:

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.

Nine, basic data:

Note: the flame-proof joint examples of the effective length and gap width can see explosion-proof enclosure structure diagram.
Ten, explosion-proof enclosure and guide pressure system parts and material:

Note: the material of window its impact strength is not less than 4 j.Observation window once damage, are not allowed to be used.

Eleven, design 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:

Level 1, I companies sell products within twelve months appear quality problem, is 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.