Answer / raj ups

I think the direct action control valve generally used in
pressure control loop as we r using it in the vapour release
vale as pressure incresese as greatter as the set point the
opening of the valve rises as quickly

Answer / umair naz mughal

direct action control valce is mostli use boiler section because if the water flow is reduce the temp is rise and boiler was damage so we use this valve this is normally open.

what diffrence b/w plc s7200,300,400

0 Answers   IFFCO, Reliance,

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Which types of quections asked in interview for FORMULATION PLANT (PHARMA)

0 Answers  

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Where is the flow transmitter installed with respect to control valve, state reason.

1 Answers   ADMA OPCO,

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Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

2 Answers   SCS,

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what is use single seated and double seated valve?

2 Answers   Doha Petroleum Construction DOPET,

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WHAT IS AN INTERLOCK SYSTEM ?? HOW THEY WORKs ?? WHERE IT IS USED ??? MAINLY ??

2 Answers   TATA, Tata Steel Limited,

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In instrumentation standard we use 4 to 20ma for transmission , why cant we use 3 to 19ma ?

1 Answers   NSH,

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if we put any thermocouple on a table in a room without any connection,what temperature should it show.

3 Answers  

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Which softwere is required to communicate the S7-300 processor

4 Answers  

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can we use flow transmitter instead of level transmitter?

7 Answers  

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How is work 5/2 sov?

0 Answers  

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What is the difference between a double acting and single acting positioner? what type of valves use single acting positioners?

1 Answers   AquaTech, NamPower, Samson Resources,

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