Model 20 Pneumatic Precision Booster0 pages

Model 20 Pneumatic Precision Booster Features >
The Model 20 Pneumatic High CapacityVolume Booster uses a pneumatic input
signal to accurately control output pressure Օ A balanced Supply Va l ve minimizes thee f fects of supply pressure va ri a t i o n An Aspirator Tube compensates d ownstream pressure droop under flow i n gc o n d i t i o n sՕOptional Adjustable By-Pass Needle Valveallows tuning for optimum dynamic
response (1:1 ratio only) Optional Fixed Negative Bias allows o p e ration with pneumatic devices that cannot be adjusted to zero input pressureՕ A separate Control Chamber isolates thed i a p h ragm from the main flow to eliminatehunting and bu z z i n g Unit construction allows servicing withoutr e m ova lՕ Mounting Bra cket ava i l a bl e
Canadian Registration Number (CRN) C e rtification for all terri t o ries and prov i n c e s

Model 2 0 Operating Principles >
The Model 20 Booster is a pneumatic
device capable of high flow and exhaustcapacity.This device uses a force balancesystem to control the movement of the sup-ply and exhaust valves.At set point, the force due to signal pressure that acts on the top of the UpperDiaphragm balances with the force due to
output pressure acting on the bottom of theLower Diaphragm. 112 8 8 0 0 - 3 3 4 - 8 4 2 2 >