Product display

One, the positive pressure explosion-proof control cabinet selection
Types of meaning
PXK - / / / / / / T
The user can mark according to special requirements
Overall dimensions: width X height X thickness (mm)
S: interlocking (user distribution and positive pressure control system of low pressure interlock)
If no special request, don|t mark the following models
T: type ventilation
Type b: compensation
X: box
Q: qintai type
G1: cabinet 1 (upper and lower structure)
G2: cabinet 2 (or structure)

Second, the structure of the positive pressure explosion-proof control cabinet
This product is suitable for the petrochemical, offshore drilling platform, metallurgy, medicine, light industry, textile, food, biological engineering, aerospace engineering and facilities such as factories, with A and B Ⅱ Ⅱ, Ⅱ C T1 ~ T4 explosive gas or steam environment; Height is not more than 2000 meters above sea level; 25 ℃, relative humidity below 95%; Working environment temperature 20 ℃ ~ + 40 ℃. Can according to user requirements to install all kinds of ordinary detection instrument, points
Analysis instrument, display instrument, transformer, soft starter, inverter, touch screen as well as ordinary electrical components of the microcomputer, built-in electrical components essential to users is not restricted.
Power distribution ark cabinet put oneself in another|s position, control system, air system, alarm system, power distribution system; Positive pressure cavity inner part control system of explosion-proof components and user distribution system components.
The power distribution cabinet is made of Q235 steel plate welding and become, to the joint surface is treated with a special seal.
This power distribution cabinet type air inlet for ventilation, the uninterrupted continuous gas supply, positive pressure cavity outfit can with gas path components work heat away, has the very good heat dissipation effect.
This product reference GB3836.1-2000, GB3836.5-2004 design, fabrication, inspection and related standards.

Third, the principle of positive pressure explosion-proof control cabinet
Distribution under the control of the automatic control system, the protective gas is piped in, the positive pressure cavity pressure is higher than positive pressure outside of the cavity pressure, the formation of the safety of the micro positive pressure small environment, to prevent the risk of combustible gas into the positive pressure cavity, within guarantee the safe operation of the instrument and electrical components of the ordinary.
Automatic control system mainly complete the manual ventilation, tonifying qi, ultrahigh pressure automatic alarm and exhaust, under-voltage alarm, low pressure interlock power series and other functions. (the power distribution cabinet has low pressure interlock function, pressure value of the lower than 50 (pa), automatic cut off into the positive pressure cavity of the user distribution power supply)