Name four general (not technical) criteria that would you
consider important, when deciding upon a particular control
valve?
Answer Posted / rajesh
the fluid medium to be used
the fluid physical properties ( viscosity , density ,
temperature etc )
the frequency of application of valve i.e the no of times
opened or closed in a hour
the flow rate , pressure desired c time , volume to be
transferred in specific time for flowing media etc
the operation to control valve
manual , automatic , pneumatic , hydraulic etc
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
Senior engineer's please help me, what is Loop Checking and Loop test? and write difference also? soon urgent
What is cut off relay? And why use in PLC and DCS?
Can combine control system for Emergency control system (ESD)and Fire & Gas System ( F & G) is possble to built and offer to client? Can such system is as per Norms in India?
Hi, I am Newely Joined in Construction company instrument engineer? Any one can Plz tell me How can I advanced preparation for Releated Engineering and construction Documents?
If relative y axis vibration sensor is by passed, and relative x axis and absolute sensor is left working. how much monitoring i would have risked?
Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system
Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72
What are the error values can accepted in flow transmitter calibration?could u give any formula for this?
Explain the use of hair spring in the pressure gauge.
What is the start up procedure of desalter
can anyone tel the syllabus or previous year question paper for BHAVINI(EIE)2014.
Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...
WHAT IS THE CAM POSITION IN CONTROL VALVE POSITIONER ? WHY IT IS USED?
please tell me what is a light up procedure of Cfbc boiler and what it's axuillaries of cfbc boiler?
we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.