Zhangjiagang Yuanda Safety Electrical Co., Ltd.

Series positive pressure explosion-proof instrument distribution cabinets (panels), hereinafter referred to as positive pressure cabinets, are cabinets used to install various non-explosion-proof detection instruments, analytical instruments, display instruments, and electrical components. It is designed, manufactured and inspected in accordance with the national standard B. "Explosion-proof Electrical Equipment for Explosive Environments and Positive Pressure Electrical Equipment". It can be widely used in dangerous places with explosive gas and dust such as petroleum, chemical industry, textile, medicine and so on.
The positive pressure cabinet introduces clean and complete compressed air into the positive pressure chamber through the intelligent control system in the explosion-proof control box and the pressure control system, so that a slight positive pressure is formed in the positive pressure chamber to prevent the leakage of dangerous gases and dust from the outside. Enter to achieve the purpose of explosion protection. This product has functions such as intelligent centralized control, LCD text display, automatic ventilation, delayed automatic power supply, pressure loss and gas replenishment, fault alarm and automatic power cut off in case of danger.
1. Structural Overview
The positive pressure cabinet consists of two parts: a positive pressure chamber and a control chamber. The positive pressure chamber is used to install various non-explosion-proof instruments or electrical appliances. The control chamber is composed of an explosion-proof control box and a pressure control chamber. system. The positive pressure cabinet shell is welded with cold-rolled steel plates, the ventilation pipes are made of galvanized steel pipes, and the incoming and outgoing cables are made of through-plate pipe joints and cable introduction compression devices. The front door is equipped with a glass display window to display instruments, indicators, etc.
2. Main technical parameters
Model specifications
Explosion-proof mark
Rated voltage
Control voltage
Rated current
Volume
Positive pressure Chamber net
Volume
Input air source
Shell protection
Level
Flow rate
Pressure
Air source interface









Internal thread
or air pipe








3. Safety indicators
The positive pressure value in the cabinet is greater than the automatic exhaust
b. When the positive pressure value in the cabinet is less than or greater than the value, an automatic alarm
will occur. If the positive pressure value in the cabinet is less than or equal to the value of the positive pressure in the cabinet, the power supply will be automatically cut off.
4. Ordering Instructions
The air path control system and explosion-proof intelligent control system in the positive pressure cabinet are supplied in complete sets with the cabinet.
When ordering a positive pressure cabinet, you must provide cabinet layout drawings, hole opening drawings, incoming and outgoing cable models, specifications and quantities, etc.
If you entrust our factory to supply complete sets, you must provide electrical schematics, instrument models, wiring diagrams, etc.
If the user has special needs, our factory can provide special processing.