800/850 Series bleed valves provide convenient means to relieve process pressures trapped between a shut off valve and the instrument.
Models employ patented features with an integrated single threaded body for insertion in a vent port. They provide shutoff to a small bleed hole located on the side of the hex which vents process media to the atmosphere.
The bleed valves also comprise patent pending body-to-bonnet, metal-to-metal seat below the bonnet threads. These isolate them from process media. The design also incorporates a dovetail feature that supplements the body-to-bonnet metal-to-metal seat. This extends valve pressure range without restricting flow.
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