The new version added to the relay valve family keeps the same body dimensions while offering a different opening pressure. This lets you choose a valve suited to the vehicle's brake balance without changing the existing connection layout.
What changed
Because the body and connection dimensions stay the same, no extra work is needed on the installation side. The difference is in the internal spring and diaphragm assembly.
When choosing
Starting from the vehicle's original valve number is the safest route. The cross-reference table in the catalogue makes it easy to find the right version from the OEM number.
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