This Airgas Specialty Gas Low Pressure Regulator Y11-N570L is in unused condition and is guaranteed to be fully functional. This item came from a local lab that had surplus inventory. We urge customers to view all photos as they show overall condition, included accessories and useful information. Please feel free to contact us with any questions. Oversized Diaphragm-provides sensitive, accurate, low-pressure control. · Remote Adjustment-prevents accidental outlet pressure change. · Large, 2oe" Gauge-permits accurate, easy reading.· Lightweight Construction-permits easy handling and installation. Airgas 0 - 15 PSI Delivery Range Ultra-Low Pressure Magnesium Alloy Pressure Regulator With 250 PSI Maximum Rated Inlet Pressure And 1 - 5 PSI Outlet Pressure Without Inlet Port And CGA Fitting These regulators are specifically designed to provide sensitive, accurate, low-pressure control for laboratory applications. They feature an oversized "pancake" body of magnesium alloy with a Buna-N diaphragm. These regulators are typically used in conjunction with other high-pressure regulators or on house-line systems that limit inlet pressure to 250 psig. They are adjusted easily by removing the knurled nut and turning the screw to alter the tension on the diaphragm. Because these regulators are not typically recommended for direct connection to cylinders, they are provided with a OE" FNPT inlet port. Direct cylinder connection is only permissible when using liquefied compressed gases with vapor pressures below 250 psig, such as 1,3-butadiene, n-butane, isobutane, isobutylene, propane, and propylene. With these products, a CGA 510 connection must be used.