When do chemical pumps need to be equipped with explosion-proof and flameproof motors ？

Chemical pumps must be equipped with explosion-proof motors in places where flammable and explosive substances exist. The specific scenarios are as follows:

Explosion-proof demand scenarios

1.flammable gas/vapor environment ‌

In petrochemical production, common flammable gases (such as natural gas, hydrogen, etc.) or vapors (such as gasoline vapor) may reach the explosive limit concentration when mixed with air. At this time, explosion-proof motors need to be used. ‌

2.combustible dust/fine particle environment ‌

When flammable dust (such as flour and grain dust, etc.) exists in chemical workshops, production facility areas, etc., ordinary motors may explode due to friction sparks or arcs, and explosion-proof motors should be used. ‌

3.flammable liquid/solid conveying scenarios ‌

When the pump is used to transport flammable liquids (such as gasoline, solvents) or media containing solid particles, if there is a risk of leakage or equipment failure may cause electric sparks, an explosion-proof motor must be equipped. ‌

Explosion-proof grade assessment

Select based on the classification of explosive substances and the hazard level of the site:

Class I ‌ : flammable gases or vapors (such as in petrochemical areas)

Class II ‌ : combustible dust (such as flour processing plants)

Class III ‌ : flammable fibers (such as those from textile factories) ‌

Special design requirements

Explosion-proof motors must meet:

1.The internal structure prevents arcs and sparks from leaking out

2.The material has anti-static and corrosion-resistant properties

3.In compliance with explosion-proof standards (such as IECEx certification) ‌

If the chemical pump is located in a non-explosion-proof area but the conveyed medium has flammable properties (such as a mixture containing gasoline), it also needs to be designed in accordance with explosion-proof standards. ‌