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Showing posts with the label Diesel Engines

New AC Fire Fuel Tank Sizes/Design - 2021

Starting immediately, AC Fire is offering a new diesel fuel tank design with more than double the current number of tank sizes available. In addition they will now come standard with emergency vents and a Tnemec N69 Crawford Red paint for better durability.  Link to PDF literature for new double-wall fuel tank on the AC Fire web-site. Also check out our blog post on Sizing Diesel Fuel Tanks or the Installation of Diesel Fuel Tanks for Fire Pumps if you want to learn more about the code requirements associated with diesel tanks. Please reach out if you need additional information.  

Installation of Diesel Fuel Tanks for Fire Pumps (OLD)

This article is based upon 2009 IFC codes and is obsolete. See newer version here: After you have determined the size of fuel tank you need for a diesel fire pump, what are the general requirements for installation?  Assuming that you are under under the International Building/Fire Codes, you would go through the following chain of code references: IFC (2009 edition) 3401.2 Nonapplicability. This chapter shall not apply to liquids as otherwise provided in other laws or regulations or chapters of this code, including: ... (3) Storage and use of fuel oil in tanks and containers connected to oil-burning equipment. Such storage and use shall be in accordance with Section 603 . For abandonment of fuel oil tanks, this chapter applies. IFC (2009 edition) 603.1 Installation. The installation of nonportable fuel gas appliances and systems shall comply the International Fuel Gas Code. The installation of all oth

Pressure Relief Valves with Diesel Engines

Circulation Relief Valve When is a pressure relief valve (PRV) required on a fire pump system?  For a standard 175 PSI rated system, the simple answer is check and make sure that your expected churn pressure plus maximum static suction pressure  will not exceed 144.6 PSI  (or 206.6 PSI for a 250 PSI rated system).  The sizing of the relief valve comes from NFPA 20 (2010 edition) table 5.25(a) which is summarized in our fire pump sizing app .  For those of you that like to know the details read on. First let's clarify that we are taking about a main pressure relief valve and not a circulation relief valve.  A circulation relief valve is generally 3/4-inch in size if less than 3,000 gpm and intended to provide a little fresh water into the pump casing for cooling purposes . Pressure Relief Valve When we say pressure relief valve in "fire pump" terminology, we are referencing a PRV that is only provided on diesel fire pumps to accommodate possible engine over