Ultra -low temperature ball valve that floats

The utility model provides an ultra -low temperature ball valve that floats, which comprises the following components: a valve body, be provided with the disk seat on the valve body, be provided with the spheroid on the disk seat, be provided with the intercommunication passageway on the spheroid, be provided with on the spheroid and communicate the through -hole that the passageway is linked together, be provided with on the spheroid and communicate the through -hole that the passageway is linked together, fuse the gaseous disk seat of import with the spheroid through the through -hole, medium circulation has been formed, guaranteed like this that gaseous gas pressure with whole pipeline has formed a whole, prevent lumen hypertonia, the security of valve has been guaranteed, realize the disk seat exit seal again, the sealing performance of valve export has been guaranteed, this ball valve simple structure, facilitating usin, be equipped with automatic pressure release function, usually, be used for the ball