Viking is a proud world leader in the design and manufacturing of life-saving fire sprinklers. The VK537 EC/QREC Ordinary Hazard ELO Fusible Element Pendent Sprinkler is just one of thousands of industry-leading sprinklers available to customers! The VK537 is a thermosensitive spray sprinkler available in several different finishes and temperature ratings to meet varying design requirements. The extra-large orifice produces the flows required to meet Ordinary Hazard density requirements at lower pressures than standard orifice or large orifice sprinklers. Pendent Sprinkler VK537 is UL Listed as standard response and quick response. The special Polyester and Electroless Nickel PTFE (ENT) coatings can be used in decorative applications where colors are desired. In addition, the ENT coating has been investigated for installation in corrosive environments and is approved as indicated in the approval chart.Sift through virtually every sprinkler in a flash with the revolutionary Sprinkler Selector! Select various criteria, such as K-factor, occupancy type, orientation, temperature and more, to get the part number you need. Test it out today and streamline your projects!