With this method, you may select :
· The pressure - vacuum valve diameter .(one or more)

Also you may obtain :
· The Normal Venting Requirements:

• Pressure: filling.
• Thermal outbreathing
• Total relief requirement.
• Total corrected pressure relief requirement.

· Vacuum (Inbreathing) requirements.

• The thermal inbreathing.
• Total vacuum relief required.

· Emergency venting requirements (bare tank).

 Also you may prove your valves design according to the fluid and the operating pressure.

Furthermore you will be able to:

· Check your existing valves for condition with filled and vacuum.
· Check your pressure – vacuum valves design modifying some one of the parameters as follows:

· Tank size (nominal: diameter and height).
· Roof thickness.
· Roof slope.
· Fluid.
· Maximum internal pressure.
· Operating pressure.
· Maximum allowable tank pressure.
· Maximum allowable vacuum.
· Relief Valve settings:
  For pressure.
  For vacuum.
· Filling rate.
· Draw-out rate (emptying).

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Exit data sheet is as follows:

To introduce the variables you must fill in a form as follows : 

INPUT FOR CALCULATION METHOD
SELECTION OF PRESSURE AND VACUUM VALVES

By :
Company :
Date :	01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Client :
Reference :	Case :
Tank No. :
Station :
Thickness of roof :	in ft m
Roof Slope:	x
Initial Temperature :	° F C K R
Fluid :	Benzine Combustoleo Crude Jet A ACPM/Diesel Gasoline Other
If you choose any other, please fill in the blue input, otherwise continue with the form
Type of fluid (Name) :
Flash point (°F):
Formula weight :
Boiling point (°C) :

Height (h) :	ft in m	Relief valve settings :
Diameter (ID) :	ft in m	For pressure :	oz/sq in in H2O psi
Working Pressure :	oz/sq in in H2O psi	For vacuum :	oz/sq in in H2O psi
Maximum Allowable Pressure :	oz/sq in in H2O psi
Maximum Allowable Vacuum :	oz/sq in in H2O psi
Filling rate :	bl/hr cub ft/s gal/min	Draw-out rate (emptying):	bl/hr cub ft/s gal/min

If you are sure press submit, if not refresh.

 * According to API 2000 standard procedures.

             
Contact us at : mechcal@copcoltd.com