Model20BP0 pages
Model 20BP Pneumatic Precision Back Pressure Booster
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Features
nnnn• The Model 20BP Pneumatic High Capacity
nnnnBack Pressure Booster uses a pneumatic
nnnninput signal to accurately control output
nnnnpressure
nnnn■ Aspirator Tube compensates pressure
nnnndroop under flowing conditions
nnnn■ A separate Control Chamber isolates the
nnnndiaphragm from the main flow to eliminate
nnnnhunting and buzzing
nnnn* Unit construction allows servicing without
nnnnremoval
nnnn• Mounting Bracket available
nnnnOperating Principles
nnnnThe Model 20BP Back Pressure Booster
nnnnis a pneumatic device capable of high flow
nnnncapacity. This device uses a force bal-
nnnnance system to open the relief valve and
nnnnvent system pressure when the set point is
nnnnexceeded.
nnnnWhen system pressure increase, the force
nnnnon the bottom of the Diaphragm Assembly
nnnnincrease until it reaches the set point. When
nnnnsystem pressure increases beyond the set
nnnnpoint, the assembly moves upward, lifting
nnnnthe Relief Valve from its seat and vents the
nnnnsystem air.
nnnnIf system pressure decreases below the set
nnnnpoint, the assembly moves downward clos-
nnnning the Relief Valve.
nnnnOUTLET
nnnnPORT
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Model 20 Mounting Bracket Kit
nnnnP/N 09921 (Zinc Plated Steel)
nnnn(sold separately)
nnnn1* NPT
nnnn800-334-8422
nnnnwww.fairchildproducts.com
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