pressurized explosion-proof cabinet

Applying scope
Hazardous gas areas: Zone 1&2 ;
Explosive gas or vapor atmospheres:class IIA.IIB.IIC,
temperature class: T1-T4;
Indoor and outdoor(IP54,*IP65).


Explosion-proof principle
Put normal equipment components into a main chamber which
is filled with protective gas to ensure the pressure of the inner
protective gas is higher than the outer to pretect explosive mixture
from entering main chamber, or to ensure enough quantity
of protective gas so that the consistency of explosive mixture is
below the explosion limit to achieve the aim of explosion protection.

Features
It adopts the structure of main switchboard and assistant switchboard.
Main switchboard is the pressurized chamber, inside installed
the normal components and the needed ventilating system,
sense system and air pressure adjustment system; the inside
of assistant switchboard installed explosion-protected displaying
system, gas exchanging autocontrol system, alarming system,
power autoswitch system, in and out gas source joint and the
exterior in and out cable sealing device;
The pressurized chamber is able to install various common check
meters, analysis meter, display meter, monitor, microcomputer
feeling screen, high-power transducer and so on. The inside installed
components are normally without limit;
The shell adopts moulded high-quality carbon steel or stainless
steel with pressurized static plastic-sprayed surface;
The structure form includes meter panel.tank.box and operation
platform;
There are pressurized ventilation and pressurized compensation
entering types.
Pressurized ventilation type is of continuous air feed, and the
heat of the components in general cavity can be sent out which
provides good heat-disfusing function;
Pressurized compensation type is of discontinuous air feed, and it
has good pressure guarantee and sealing function;
The user must supply gas source (clean air or nitrogen gas),the
gas pressure is 0.4MPa-0.8Mpa; usual gas source is available