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.
For Thermal Req refer to Table 1 Requirements for Thermal Venting Capacity
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
 +
 =
For further assistance or information call (330) 253-4800or email: sales@prdtechnologies.com