Annotate special relief valve of nitrogen machine

The utility model relates to an annotate special relief valve of nitrogen machine, including valve body, disk seat, valve clack, valve rod, pressure setting mechanism, the disk seat is installed in the valve body intake channel, and pressure setting mechanism adopts the spring structure, and the valve clack openly has the sealed face of mutually supporting with the disk seat, valve clack back roof pressure terminal surface under the valve rod, mainly be that the outer face of cylinder movable fit of valve clack is installed in the uide bushing at disk seat export fixed mounting uide bushing, the system has a plurality of radial escape orifices on the uide bushing circle wall of valve seat seal off -plate side. The valve clack is opened stably, the accuracy is put at time seat, sealing performance is reliable. Be applicable to the notes nitrogen pipeline safety of the system valve of shale oil exploitation operating mode.