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M4500ABP0 pages
Model 4500ABP Pneumatic Back Pressure Booster
nnnnFeatures
nnnn* Control sensitivity of 1" water column
nnnnallows use in precision applications.
nnnn• Large Exhaust Valve provides
nnnnhigh exhaust flows.
nnnn* An Aspirator Tube compensates pressure
nnnndroop under flow conditions.
nnnn• A separate Control Chamber isolates
nnnnthe diaphragm from the main flow to
nnnneliminate hunting and buzzing.
nnnn• Unit construction lets you service the Model
nnnn4500ABP without removing it from the line.
nnnnOperating Principles
nnnnThe Model 4500ABP Booster is a pneumatic
nnnndevice capable of high flow capacity. This
nnnndevice uses a forco balance system to open
nnnnthe relief valve and vent system pressure
nnnnwhen set point is exceeded. When system
nnnnpressure increases, the force on the bot-
nnnntom of the Diaphragm Assembly increases
nnnnbeyond the set point, the assembly moves
nnnnupward, lifting the Relief Valve from its seat
nnnnand vents the system air.
nnnnIf system pressure decreases below the set
nnnnpoint, the assembly moves downward clos-
nnnning the Relief Valve
nnnnVtNPT —. ,
nnnnLi final
nnnn3'B hi I11
nnnnttypfcnll
nnnnHK Fort
nnnn'"'qr PfyU
nnnn800-334-8422
nnnnwww.fairchildproducts.com
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