Image Credit: Price Pump Company | Flygt, a Xylem brand | KSB AG
Explosion proof pumps are pumps specially designed to enclose parts of the pump that could be subject to internal damage or could cause explosion of the transfer media or surrounding atmosphere. They are used in applications which involve flammable media or combustible environments that require protection or isolation from ignition sources.
Explosion proof pumps can be designed to operate based on a dynamic or positive displacement principle. Dynamic pumps, and their subtype centrifugal pumps, utilize fluid momentum and velocity to generate pump pressure while positive displacement pumps use expanding and contracting cavities to move fluids. Dynamic pumps produce a variable flow suited for generating high flow rates with low viscosity fluids, while positive displacement pumps produce a constant flow suited for producing high pressures (and low flow rates) with high viscosity fluids.
Selecting a suitable pump requires an analysis of different pump types. Most types of pumps can be designed as explosion proof, so users must distinguish between types based on their performance and application. Information on the different pump types can be found on GlobalSpec's Pump Types page.
The primary specifications to consider when selecting explosion proof pumps are flowrate, pump head, pressure, horsepower, power rating, outlet diameter, and operating temperature. These specifications are described in detail in GlobalSpec's Pump Flow page.
Materials of construction are an important factor to consider, particularly for explosion proof pumps where isolation and protection from ignition sources is the primary feature. Materials also must be compatible with the media to prevent contamination of the fluid or corrosion within the pump. Materials and other pump features can are described in the Pump Features page on GlobalSpec.
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