What is the use of booster relays ?

What is the use of booster relays ?  
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1 Answer

Answer :

Booster relays are essentially air load, self contained pressure regulators. They are classified into three broad groups :

 1. Volume Boosters : These are used to multiply the available volume of air signal.

2. Ratio Relays : Use to multiply or divide the pressure of an input signal.

3. Reversing Relays : This produces a decreasing output signal for an increasing input

 signal.
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