C2W Relay Air Valve Posted on June 30, 2017June 30, 2017 by admin 0 The C2W Relay Air Valve is a diaphragm cooperated self lapping valve having higher capacity which is used as a remote controlled pneumatic device to relay a large quantity of main air reservoir pressure to the operating system for brake application. Share on Facebook Share Share on TwitterTweet Share on Pinterest Share Share on LinkedIn Share Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website