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backpressure

   Also found in: Medical, Encyclopedia, Wikipedia 0.02 sec.
back·pres·sure  (bkprshr)
n.
Residual pressure opposing the free flow of a gas or liquid, as in a pipe or an exhaust system.


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The regulators are single stage, piston type with backpressure compensation and internal relief valve.
The cylinder fills to a set position at a set backpressure to ensure the proper shot size.
During low-speed operation, the exhaust valves on the two inner tailpipes remain closed to reduce noise, while the valves are opened pneumatically at higher-speed operation to increase the pipe cross-section, reduce backpressure, which results in improved engine power output.
 
 
 
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