| PRXB
Exhaust Brakes: Mechanics
With over a
quarter of a million exhaust brakes manufactured and sold, Pacbrake
has mastered quality product development. Being home to the only
exhaust brake on the market with a true variable orifice, remarkable
constant backpressure and strongest braking horsepower, Pacbrake
has revolutionized modern day exhaust braking with its patented
design of the PRXB.
WHAT’S
SO SPECIAL ABOUT THE PRXB? In
order to have consistent and effective braking over the entire RPM
range, it is important (and necessary) to maintain constant backpressure.
To achieve this, Pacbrake’s patented design has incorporated
an additional waste gate on the butterfly valve to regulate the
amount of exhaust flow that is being passed through. The flow is
controlled by a spring-loaded arm, whose pressure rating and location
are key factors in the functionality of the PRXB. Located outside
of the housing and away from the heat, the spring is able to maintain
its strength and durability for years of proper and precise braking
performance.
PUTTING
IT ALL TOGETHER
CREATING
& MAINTAINING BACKPRESSURE
Backpressure
is created by exhaust flow entering the housing, hitting the closed
butterfly valve and being forced back out in the direction it came.
It is maintained by the pressure-controlled spring that is located
on the outside of the exhaust brake housing.
PREMIUM
BRAKING PERFORMANCE
As the
engine’s RPM increase, the spring compresses and the arm moves
away from the butterfly valve, therefore releasing more exhaust
flow through the orifice. As the RPMs decrease, the spring releases
and the arm applies pressure back onto the plate, covering the hole,
and ultimately releasing a smaller amount of exhaust flow.
There is less
than a 10% change in backpressure over the entire RPM range on the
PRXB
PACBRAKE'S
PRXB
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