Especially if you’re dealing with a rugged application, you have questions about submersible pumps. We receive a lot of common questions that we’ll begin to address here. We hope that by sharing them with readers, we can make your selection process faster and easier. We’ll also clarifying some issues you may not have thought to ask. We’ll include additional FAQs in future posts.How many starts per hour can a submersible pump handle? Can a cast-iron pump handle more than a stainless steel pump?
Before we delve too deeply into this question, let’s first define what “starts per hour” means. It’s the number of times in an hour that a pump starts pumping and then stops. It’s also known as the “duty cycle”. Both stainless steel and cast-iron BJM pumps are rated for ten starts per hour or fewer.
Safety is a chief concern for all industries. Certain industrial companies in specific markets (Ex. oil & gas, mining, etc.) have regulations related to combustibility due to gases produced or that are existing with applications. In these cases, submersible pumps specially constructed to eliminate the risk of explosions are necessary. In fact, many local jurisdictions explicitly mandate the use of explosion proof pumps.Higher Risk Applications
Certain applications are especially susceptible to explosion risks. The mining and oil & gas industries face pressurized, escaping underground gas. In chemical plants and refineries, liquids emit flammable vapors. Landfill leachate applications include methane from decomposing waste. Also, power plants and industrial plants may have volatile chemicals present. In these cases, a spark from a pump or even a hot enough surface can ignite the gases or chemicals.
Directional drilling has been around since the 1920’s and is a process that has enabled water and sewer pipes as well as telecommunications and electric lines to be installed underneath roads, waterways, and hard-to-reach places across the United States. The drilling of non-vertical wells at multiple angles has also enabled the oil and gas industry to better reach energy reserves and minimize the environmental impacts of some wells. One directional drilling company based in Colorado specializes in horizontal directional drilling (HDD) using a fleet of trucks and portable equipment to support infrastructure projects all over the country.
This company travels to the construction site and prepares for the HDD project by digging a 10-foot deep holding pit. This 15’ x 15’ holding pit is filled with water and a submersible pump is inserted to transport spent drilling fluid up to a separator truck.