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Answer Posted / vinesh prajapati ,guj. +919974
1) Reduces HYSTERESIS due to function at gland portion
2) Improves Linearity
3) Works as a volume booster and Thus improve the speed of
Actuator opretion
4) Works as a span amplifier when spring range of actuator
is not 0.2 to 1.0 Kg/Cm2
5) Required whenever spli range control is required
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