Pressure
Regulator
Valve
Design
Engineering
Compact Guide
INCLUDE:
Pressure Regulator
Valve definition and reading the valve information in P&ID, Pressure Regulator
Valve type : Pressure
Reducing and Backpressure Regulator, valve Manufacturer, selection guide, Instrucalc calculation, and design recommendation.
FERI ARDIAN THEINSCR
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Welcome to the Compact Guide for Pressure
This guide is designed to be brief and to the practice in professional work to supercharge engineering skills.
You will learn a quick and practical knowledge Regulator Valve. This will include : Pressure valve information in P&ID, Pressure Regulator Backpressure Regulator, valve Manufacturer, design recommendation.
We hope this guide will efficiently improve engineering knowledge and skill.
Thank you.
Feri ArdianPressure Regulator Valve (PCV) Design Engineering. the point, covers important topics and good supercharge your instrumentation & control design knowledge for design engineering of Pressure
Pressure Regulator Valve definition and reading the
Regulator Valve type : Pressure Reducing and Manufacturer, selection guide, Instrucalc calculation, and your pressure regulator valve design
Pressure Regulator Valve (PCV) is a self-actuated control valve which used energy from process line to control the pressure at downstream or upstream the PCV.
If it is used to control the pressure at downstream of the valve, then the sensing line will be at downstream of valve, and this PCV type is called Pressure Reducing Regulator Valve. If it is used to control the pressure at upstream of the valve, then the sensing line will be at upstream of valve, and this PCV type will be called Backpressure Regulator Valve.
P&ID is a standard process drawing shows Piping and Instrumentation
Diagram in a facility.
Sample Symbol of PCV Pressure Reducing Regulator Type and PCV Backpressure Regulator type are marked with orange circle in the following snapshot of P&ID.
This P&ID shows an arrangement of instrument and service air line from an Instrument Air Receiver Vessel D-4830 to each main line distribution. There are 2 branch line distribution : first one is for instrument ai second one is for service air.
Suppl pressure for instrument air distribution is controlled b two PCV PCV-6620
PCV-6620 which have following specification : Sensing line at downstream, hence PCV t pe is Pressure Reducing Regulator Valv pressure control set point at barg for PCV-6620 A and 6.5 barg for PCV-6620
bod size is 1 inc
rating/class is 300 line number is 2”-IA-1433-0-B10
Suppl pressure for service air distribution is controlled b PCV-66209. which have following specification : sensing line at upstream, hence PCV t pe is Backpressure Regulator
pressure control set point at 6 barg
bod size is 1 inc
rating/class is 300 line number is 2”-SA-1461-0-B10
PCV DEFINITION AND P&ID SYMBOL
Each project will have Pipe Specification document which provide information about piping size, material, class/rating used in the project.
Other important document which we need to review is Valve Specification document. This document will provide information related with valve size, type, material of construction of the valve used in the project.
Those documents are maintained by piping discipline. Depend on project, sometimes those documents combined in one document only.
How 4 5 6
In previous discussion of P&ID, we have P V with line number :
2”-IA-1433-0-B10
2”-SA-1461-0-B10
From above line number, line class is identified with latest two digit number which is B10. Refer to project P&ID legend for detail how to read line number.
PCV line class 7 8 9 10 11
Line rating, connection type, and material.
Now we review the pipe material specification doc ment for B10. B10 is pipe material specification with 150 lbs rating, and carbon steel pipe material. For line n mber 2 -IA-1433-0-B10 , 2 indicate the pipe size.
From the table we can get the information related with piping is as follow
2 pipe size have pipe sched le 8
pipe flange connection type is 150 lbs rating, threaded RF type pipe material is API 5L Gr B seamless galvanised to A153 Class B
PCV rating, connection type, body and trim material.
From previo s page in P&ID we get the body size of PCV is 1 inch.
Since the PCV valve type is globe, we refer to the globe valve section with 1 size and we will get the following information
valve rating is 800 lbs, threaded type. And we select end connection type is flange RF to match with flange of the pipe as described above.
Valve body material is carbon steel A10
Valve trim material is stellite coated. We will select 316SS as trim material d e to normally project specification specified 316SS is minim m material for control valve trim.
Direct Operated Type
Pilot Operated Type
Pressure Reducing Regulator Valve Type
aintain pressure at downstream o the al e
Sensing line at downstream o the al e
Val e is normally open ( ail open
Pressure set point is established by selecting appropriate spring
Pressure Regulator Valve
Regulator
Backpressure Regulator Valve
aintain pressure at upstream o the valve
Sensing line at upstream o the valve
Valve is normally close ail close
Pressure set point is established by selecting appropriate spring
P1 > P2.
Diaphragm (to sense pressure from sensing line)
Valve Stem (connected diaphragm with valve plug)
P2 is downstream pressure to be maintained at certain set point. Set point is established by selecting suitable valve spring. P1
Valve Plug (When no pressure, spring/stem will push down the plug and make it fully open)
Screwed Type ( to adjust spring set point)
Control Spring (for Set Point) Push the Stem Down
Tube (Internal Sensing Line) located at downstream. Pressure will push diaphragm up. Valve port (area which fluid flow through the valve)
Pressure Regulator
Valve definition and reading the valve information in P&ID, Pressure Regulator
Valve type : Pressure Reducing and Backpressure Regulator, valve Manufacturer, selection guide, Instrucalc calculation, and design recommendation.
PRESSURE REGULATOR VALVE
DESIGN ENGINEERING COMPACT GUIDE
Pressure Regulator Valve Design Engineering
Compact Guide is designed to be brief and to the point, covers important topics and good practice in professional work to supercharge your instrumentation & control design engineering skills in more efficient way.