Explosion proof pumps are designed to prevent internal or external explosions by enclosing parts that could ignite either the transfer media or the surrounding atmosphere. Intrinsically Safe Store provides explosion proof pumps for use in potentially explosive atmospheres.
Types of Explosion proof pump
Explosion-proof pumps operate on either a dynamic or positive displacement design. The dynamic pump type uses fluid momentum and velocity as a means of generating pumping pressure. This version works well with variable flow requirements and low viscosity material. Dynamic explosion-proof pumps can deliver a high flow rate in hazardous areas. Centrifugal pumps are a dynamic pump design.
Positive displacement explosion-proof pumps use changes in cavity volume to transfer material. The positive displacement type is well suited for applications requiring a constant flow at high pressure with relatively low flow rates. This type of explosion-proof pump is ideal for hazardous areas with high viscosity fluids.
There’s risk of explosion whenever you’re pumping liquid out of a Hazardous facility. Depending on the type of fluid transported out of the area, there is a significant threat to safety.
Explosion proof pump Class and Division
Dust-tight specifications are approved for use in Class II, Division 2, or Class III, Division 1 or 2 locations; Explosion proof designations are approved for use in Class I, Division 1 or 2 locations. Qualification for Division 1 meets Division 2 requirements.
Constructing a pump is not enough to rate for “explosion proof”. A third party must approve the pump for use in explosive environments. Two of the more common agencies are Factory Mutual Insurance (FM) for wastewater and industrial applications, and the Mine Safety and Health Administration (MSHA) for the mining, metals and aggregate industry. For FM, there are different types of approval depending on the specific application requirements.
Class 1: Flammable gasses and vapors are present leading to a potential risk.
Division 1: Hazardous materials are present under normal operating conditions. Division 2 means gasses present an upset condition.
Group C and D: These refer to specific gasses for which the pump or motor are rated.