This valve will always work the brakes first, only allowing the reservoir to fill when the brakes are released. This allows you to drive right away, without waiting for your air compressor to fill the reservoir. This relay feature dramatically lowers the spring brake release times. This feature along with spring brake priority operation means much faster getaways. The built in control port prevents brake compounding.
3/8" Control port size3/8" Supply1/2" Reservoir port size3/8" Delivery port size
Used on these trailers: Belly Dump, Elliptical, End Dump, Flip Axle, Lowboy, & Super Scrapper.
Replaces part# Sealco 110500 / 110800