|
Press/Vac Vent Calculations
API 2000 Std for Sizing Pressure Vacuum Valves
|
NORMAL (OPERATING VALVE) CALCULATIONS
Select appropriate equations to calculate outbreathing (pressure relief) and inbreathing (vacuum) requirements for your application.
ie six different equations shown depending on pump in / out flow rates GPM or BPH and Product Flash Pt / Boiling Pt.
 |
 |
 |
Pressure Relief Requirements Outbreathing
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
1
|
Flash Point >100F, Boiling Point > 300F
|
|
|
|
|
GPM
|
 |
 |
 |
 |
 |
 |
|
|
Pump In
|
 |
 |
 |
|
 |
Required Flow
|
|
|
|
x
|
8.57
|
+
|
|
=
|
|
|
|
 |
 |
 |
 |
 |
 |
 |
|
2
|
Flash Point >100F, Boiling Point > 300F
|
 |
 |
|
|
BPH
|
 |
 |
 |
 |
 |
 |
|
|
Pump In
|
 |
 |
 |
Thermal Req
|
 |
Required Flow
|
|
|
|
x
|
6.00
|
+
|
|
=
|
|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
3
|
Flash Point < 100F, Boiling Point < 300F
|
|
|
|
|
GPM
|
 |
 |
 |
 |
 |
 |
|
|
Pump In
|
 |
 |
 |
Thermal Req
|
 |
Required Flow
|
|
|
|
x
|
17.14
|
+
|
|
=
|
|
|
|
 |
 |
 |
 |
 |
 |
 |
|
4
|
Flash Point below 100F, Boiling Point below 300F
|
 |
|
|
BPH
|
 |
 |
 |
 |
 |
 |
|
|
Pump In
|
 |
 |
 |
Thermal Req
|
 |
Required Flow
|
|
|
|
x
|
12.00
|
+
|
|
=
|
|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
Vacuum Relief Requirements Inbreathing
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
Flash Point or Boiling Point Not a factor!
|
|
|
|
5
|
GPM
|
 |
 |
 |
 |
 |
 |
|
|
Pump Out
|
 |
 |
 |
Thermal Req
|
 |
Required Flow
|
|
|
|
x
|
8.00
|
+
|
|
=
|
|
|
|
 |
 |
 |
 |
 |
 |
 |
|
6
|
BPH
|
 |
 |
 |
 |
 |
 |
|
|
Pump Out
|
 |
 |
 |
Thermal Req
|
 |
Required Flow
|
|
|
|
x
|
5.60
|
+
|
|
=
|
|
|
|
|
|
|
|
|
|
|
|
|