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vipulvaghela111
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Join Date: Feb 2012
Posts: 1

Instrumentation

02/03/2012 1:16 PM

We are giving 4 bar to 6 bar pressure to control valve actuator and line pressure is 60 bar. Then how the pneumatic control valve operating in line ?
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WJMFIRE
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Join Date: Apr 2009
Location: USA, Florida
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#1

Re: instrumentation

02/03/2012 1:23 PM

Can be done two ways.

1. Same principle as hydraulics is used.

2. Pressure differential valve is used.

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34point5
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#2

Re: Instrumentation

02/03/2012 9:22 PM

You'd usually use something in the 'balanced piston' category (which are independent of line pressure)

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#3

Re: Instrumentation

02/06/2012 11:39 AM

Carry out a force balance on the moving parts of the valve. All will become clear.

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