| 摘要 |
A brake control valve device, for railway vehicles, embodies an adjustable service brake cylinder limiting valve that may provide any chosen brake cylinder pressure and also an adjustable emergency brake cylinder limiting valve that may provide any selected higher brake cylinder pressure when the control valve device is conditioned for effecting either a direct release of the brakes or a graduated release of the brakes accordingly as a removable selector valve cover member is secured to a ported face formed on the exterior surface of the control valve device in either a direct release or a graduated release position with respect to this ported face. |
