Integrated nuclear grade 1 nozzle

The utility model provides an integrated nuclear grade 1 nozzle and relates to a throttle device with safety grade of safety grade 1. The integrated nuclear grade 1 nozzle comprises a body and more than one pair of pressure tapping holes which are arranged in the body, the body is an integrated structure, a cavity is arranged in the body, two ends respectively extend to side parts for forming an upstream pipe section part and a downstream section part, a nozzle is arranged in the cavity of the body, which is near to the middle part, and the pressure tapping holes which are arranged in pairs are respectively arranged on two sides of the upstream part and the downstream part of the nozzle and communicated with the cavity of the body. The integrated nuclear grade 1 nozzle has the advantages of simple structure, small volume, light weight, convenient installation, very high anti-seismic stability, fewer leak points, high coaxiality and measurement precision, safety and reliability.