Pressure reduction valve.  This valve is used for sampling from pressurized lines and is suggested for use with a software enhanced 6712 sampler.  It reduces pressures from as high as 300 psi down to levels safe for Teledyne ISCO samplers.  Equipped with stainless steel components and a brass body, it includes a gauge to monitor output pressures.  Factory preset to 10 psi.  It is a portion of the Pressurized Line System (#685304001).  This product does not handle solids.