The hand valve, or "spike" (Fig. 39) is added so that you can apply the trailer’s brakes independent of the tractor. The hand valve is typically supplied from primary and secondary circuits and plumbed to a double-check valve (which is also fed from the foot valve). The double-check valve isolates either the foot valve or the hand valve, depending on which one has the highest application pressure. Tips： Some spare parts of the whole vehicle are heavy because they are made of iron and are not easy to be damaged. So most of them are sent out of the factory without packing. If there is no special requirement, we will not add extra packing.
Hand brake valve parameter
M16 x 1,5
Operating pressure to
M16 x 1,5
Hand brake valve Picture
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