M20BP0 pages
Model 20BP Pneumatic Precision Back Pressure Booster
1 L>rjlLM HO WMJ | ■It |
1 i iwmewi wapurs f■ - 1 1 |
Features
• The Model 20BP Pneumatic High Capacity
Back Pressure Booster uses a pneumatic
input signal to accurately control output
pressure
■ Aspirator Tube compensates pressure
droop under flowing conditions
■ A separate Control Chamber isolates the
diaphragm from the main flow to eliminate
hunting and buzzing
* Unit construction allows servicing without
removal
• Mounting Bracket available
Operating Principles
The Model 20BP Back Pressure Booster
is a pneumatic device capable of high flow
capacity. This device uses a force bal-
ance system to open the relief valve and
vent system pressure when the set point is
exceeded.
When system pressure increase, the force
on the bottom of the Diaphragm Assembly
increase until it reaches the set point. When
system pressure increases beyond the set
point, the assembly moves upward, lifting
the Relief Valve from its seat and vents the
system air.
If system pressure decreases below the set
point, the assembly moves downward clos-
ing the Relief Valve.
OUTLET
PORT
1 7« n T
47.6 of in*
X
9(16
144*
55* '**'
3M
V
4t
2 1/4
76.2
B.S
1/8
28.6
T
1
M NPT ■
Signal P(*1 ^ +
t 51.164
04HFT
Ojitfti Ron
f M NPT
IMJ | |
ma i — | |
^ 221*3? | i |
Model 20 Mounting Bracket Kit
P/N 09921 (Zinc Plated Steel)
(sold separately)
1* NPT
800-334-8422
www.fairchildproducts.com
"