NOSHOK”s 800/850 Series bleed valves provide are designed to relieve process pressures trapped between a shutoff valve and the instrument. The valves use the same patented features as the NOSHOK 100/150 Series mini valves, with an integrated single-threaded body for insertion in a vent port. The bleed valves provide shutoff to a small bleed hole located on the side of the hex, which vents the process media to the atmosphere. They also feature a patent pending body-to-bonnet, metal-to-metal seat below the bonnet threads, isolating them from the process media. The patent-pending design incorporates a unique dovetail feature that supplements the body-to-bonnet metal-to-metal seat, which extends the pressure range of the valve without restricting flow. Available in electroless nickel plated 12L14 steel, electropolished 316 stainless steel and 360 brass. All bleed valves are equipped with a Viton o-ring and Teflon backup ring below the stem threads to protect against corrosion and galling. Teflon or Grafoil packing are optional. The valves have a maximum pressure rating of 10,000 PSI for steel and stainless models, and 6,000 PSI for brass models.