can we use a control valve without positioner

Answer Posted / santosh nanavati

Yes, it can be used without positioner with the following
condition.

(1) Spring operating range should be 0.2 to 1.0 Kg/Cm2.
(2) If the application of the control valve for the
relevant process parameter control is not critical, the
valve can work without positioner i.e. it will give less
accurate output & control of parameter.

Is This Answer Correct ?    15 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

1136


How can we test a bently nevda 3500/42M accelerometer monitor card by simulating it with test equipment?. what king od of signal (milli volts or volts or or resistance ) we should feed in the terminals of the card?

2021


What should be the main consideration while starting the Rotating compressor when we dont know the cut in and the cut off pressure setting of the pressure switch

1702


How oil line flow measured?eplain about instruments used and working principle?

1555


What is three element drum level control system why its better than single element?

2069






Operational amplifiers

1531


what is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

1569


please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...

1522


Do you have reference list?

1433


Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

934


how many types of viberation transmitter and how to calibrate and where use of vibration transmitter

1696


which type of filter gives the constant phase characteristics?

1576


What denotes the 5/8mm in the 3300XL 5/8mm proximitor probe?

991


what is intrinscily safe system and where we use?

2006


Explain working principle of lvdt?

640