Product Overview
Product Overview
The YX-100-B explosion-proof electric contact pressure gauge is suitable for measuring the pressure of mixtures or various non explosive media in places with explosive hazards. This table is designed according to the relevant provisions and standards of GB3836.1 83 "General Requirements for Explosion proof Electrical Equipment for Explosive Environments" and GB3836.2 83 "Explosion proof Electrical Equipment for Explosive Environments - Explosion proof Electrical Equipment" d ", and manufactured with approved drawings and technical documents by the inspection agency. The explosion-proof category of the instrument is Class II explosion-proof type B level T4 group, with the symbol Exd Ⅱ BT4.
Technical indicators
Accuracy level: 1.6 level
Scale range: 0-60MPa; -0.1～2.4MPa
Control mode: upper and lower limit slow contact switch or customized according to customer requirements
Working voltage: DC24V, AC 220V or AC 380V;
Contact power: 50VA/30W, DC24V/0.25A
Working position: Vertical installation
Environmental conditions for use: -10~50 ℃, relative humidity not exceeding 80%, and explosive mixtures should belong to Class IIB T4 or below. The working vibration and rapid pulsation of the measured medium should not affect the reliable operation of the instrument contacts.
Temperature effect: The displayed value should not exceed 0.4%/10 ℃, and the set point should not exceed 0.6%/10 ℃ (with a temperature deviation of 20 ± 5 ℃).
Insulation strength: 50Hz sine AC 2000V for one minute
Weight: 2kg
Types and basic parameters of explosion-proof joint surfaces
Shell volume V (L)
＞0.5
Joint surface type
plane
Cylinder (movable part)
Minimum effective length of explosion-proof joint surface L (mm)
eight
Minimum effective length L1 from the edge of the screw through-hole to the explosion-proof joint surface
seven
Gap or diameter difference of explosion-proof joint surface W (mm)
zero point one five
Surface roughness Ra of explosion-proof joint surface
three point two
one point six
Note: An example of the effective length and gap width of the explosion-proof joint surface can be found in the schematic diagram of the explosion-proof shell structure.
Explosion proof shell and pressure guiding system components and materials
Part Name
Material grade or name
Part Name
Material grade or name
Drive shell outlet box
ZL102 (or ZL-102, ZL-101)
connection
SUS304
bushing
HPb59-1
Bourdon tube
SUS316L
window glass
Tempered glass
Note: The material of the observation window has an impact resistance strength of not less than 4J. Once the observation window is damaged, it is not allowed to be used.
structural principle
The instrument consists of an explosion-proof shell, a measurement system, an electrical contact group, a regulating device, and an outlet box. The explosion-proof shell of the instrument has good explosion-proof performance, so it can not only withstand the explosive pressure generated by the explosive gas mixture inside the shell in the event of an explosion due to the influence of sparks or arcs during normal operation, but also effectively prevent the heat energy generated from spreading smoothly outward, and can only slowly diffuse outward along the small gaps of the explosion-proof joint surface inside the shell. At this point, the instantaneous temperature transmitted to the outside of the shell has dropped below the ignition temperature of the explosive gas mixture, so it will not cause detonation.
The working principle of the instrument is based on the elastic deformation of the detection element (spring tube in the measurement system), which drives the contacts in the electrical contact group to produce corresponding actions (closing or opening) through mechanical transmission, so as to connect or disconnect the circuit in the voltage control system, thereby achieving the purpose of automatic control alarm and on-site indication.