GK型三通阀是在K型三通阀基础上改进的,它将原滑阀上的减速缓解联络沟和减速缓解孔去掉,另在滑阀座上、制动缸与排气孔间,距滑阀套外端 43.3±0.2毫米处,增设一个φ3毫米的减速缓解孔。其目的是扩大全缓解的排风截面,加快全缓解的排风速度,从而使长大列车的前、后部车辆的缓 GK-type three-way valve is improved on the basis of the K-type three-way valve, which will be the original slide valve to reduce contact mitigation and deceleration to alleviate the hole to get rid of the other in the sliding seat, the brake cylinder and exhaust, From the outer end of the spool sleeve 43.3 ± 0.2 mm, add a φ3 mm slowdown relief hole. Its purpose is to expand the full ease of exhaust cross-section, to speed up the full relief of the exhaust speed, so that the growth of the train before and after the slow vehicle