Positive pressure explosion-proof-Ningbo Guante Refrigeration Technology

Expert in total solutions for temperature control equipment

网站首页

Classification:

The positive pressure cabinet is composed of two parts: positive pressure chamber and control chamber. The positive pressure chamber is used to install various non-explosion-proof instruments or electrical appliances. The control chamber is composed of explosion-proof control box and pressure control system. The shell of the positive pressure cabinet is welded with 2~3mm cold-rolled steel plate, the ventilation pipe is galvanized steel pipe, and the incoming and outgoing cables adopt the plate pipe joint and the cable introduction pressing device. The front door is equipped with glass display windows, display instruments and indicator lights. It is designed, manufactured and inspected according to the national standard GB3836.5-2004 "Positive Pressure" P "for Electrical Equipment in Explosive Gas Environments. Can be widely used in petroleum, chemical, pharmaceutical and other dangerous places with explosive gas, dust. The explosion-proof mark is Expxdmb Ⅱ CT4 Expxdmb Ⅱ BT4.

The positive pressure cabinet introduces clean and safe compressed air into the positive pressure cavity through the intelligent control system and the pressure control system in the explosion-proof control box, so as to form a micro positive pressure in the positive pressure cavity, prevent the entry of external dangerous gas and dust, and achieve the purpose of explosion-proof. The product has the functions of intelligent centralized control, LCD text display, automatic ventilation, delayed automatic power supply, loss of pressure and air supply, fault alarm and automatic power cut off in case of danger.

1. Structure Overview

The shell of the positive pressure cabinet is welded with 2~3mm cold-rolled steel plate, the ventilation pipe is galvanized steel pipe, and the incoming and outgoing cables are passed through the plate pipe joint and the cable introduction pressing device. The front door is equipped with glass display window, display instrument and indicator lamp, etc.

2. working principle

1. After the external 380V or 220V AC is introduced into the explosion-proof control box, press the "start button", the solenoid valve opens the air inlet pipe, the compressed air enters the positive pressure chamber after filtering and decompression, and the dangerous gas in the positive pressure chamber is discharged from the positive pressure chamber through the exhaust valve. When the dangerous gas in the positive pressure chamber is changed to a safe value, the ventilation is completed, the interlocking contact is automatically closed, and the electrical appliances and instruments can work.

Safety instructions

Automatic exhaust with positive pressure cavity pressure greater than 500pa

Positive pressure cavity pressure less than 100pa automatic alarm

Quality Assurance

Ensure that the goods sold are brand new products that meet the requirements of the contract and are qualified by the factory inspection, and that the quality, performance, technical indicators and configuration are in accordance with the contract and the manufacturer's technical documents.

Installation and commissioning

After arrival, if on-site installation and debugging are required, our company or our company's agent shall be responsible for the installation and debugging of the instrument.

Acceptance

After installation and commissioning, the customer shall confirm that the goods are brand-new products in accordance with the contract, and that the quality performance, technical indicators and random configuration are in accordance with the contract and the manufacturer's technical documents, and after confirming the acceptance of the full set of technical documents, sign the installation acceptance report to confirm the acceptance.

Training

At the same time of equipment installation and commissioning, our company's after-sales service engineer is responsible for on-site technical training for users until users can operate skillfully. During the use of the instrument, customers can consult the after-sales service personnel of our company for relevant technical problems at any time, and arrange on-site training or remote guidance by our company according to the situation.

After-sales service

From the date of acceptance, a one-year free warranty will be provided, and all maintenance costs and spare parts costs during the warranty period will be free (the cost price of spare parts will be charged for instrument failure caused by human factors); After the warranty period, the equipment will be responsible for maintenance for life and will be charged appropriately according to the actual maintenance cost.

Service Commitment

After receiving the customer's written repair, respond within 24 hours; and according to the customer's location, arrive at the scene within 48 hours to solve.

Key words:

Heating and cooling temperature control system

Heating refrigeration circulator

Low temperature refrigeration circulator

Heating circulator

Positive pressure explosion-proof

Isolation and explosion-proof

Cooling water circulator

Other products

Other Products