Parker Hannifin Corp. introduces the NSL Series of 2-in. flow size stainless steel couplings that are non-spill and high-flow. The Parker NSL Series provides an easy-to-use, secure connection to transfer, fill and dispense diesel exhaust fluid (DEF) and other chemicals from point of manufacture to bulk, point-of-use storage. DEF is used with the selective catalytic reduction (SCR) system on diesel vehicles to reduce the emission of polluting nitrogen oxides (NOx).
Because Parker’s NSL Series couplings are designed specifically to handle non-hazardous DEF, a key advantage over competitive products is cost, says the manufacturer. The couplings also offer a number of other benefits, says the company, including: a two-inch male/female coupling set that delivers a high flow rate of up to 100 gal. per minute, with excellent flow versus pressure drop characteristics to maintain optimum system integrity; port configurations to accommodate standard tank and hose fittings; non-spill valving with near-zero spillage and air inclusion; an easy-to-use, familiar quick connect operation; and a stainless steel construction that offers chemical compatibility and enhanced durability.
Parker’s NSL Series is designed for use by manufacturers of DEF pumping and storage systems; DEF manufacturers; and personnel responsible for maintenance and refueling of diesel vehicles, particularly as it concerns DEF and the SCR system.
DEF is produced to an international standard (ISO 22241) and consists of 32% automotive-grade urea and 67.5% deionized water. Purity is essential to the performance and working life of the SCR after-treatment system. Proper concentration is essential to the effectiveness of the NOx reduction process. Should DEF be contaminated, the following could occur: SCR performance could be negatively affected; vehicle warranties could be voided; premature catalyst deactivation; and fouling of pre-filters and injection hoses. The misfueling of DEF is an issue, particularly in the United States, where the DEF dispenser nozzle or canister is smaller than the diesel fuel tank inlet. This creates a very real possibility of contamination, posing a concern for end users.
