GasLOK Calculator
Service Line Calculator
EFV Comparison / Calculator
Service Line Protection Calculator
Natural Gas - Service Line Protection Calculator Across Pressure Ranges
WARNING: The calculations used in this program are correct, to the best of our knowledge, and represent calculations determined by GF Central Plastics. Georg Fischer accepts no responsibility for the use or application of this calculator. Every installation has its own set of variables that must be taken into consideration. The user of the calculator must insure that proper engineering practices are followed when selecting the appropriate excess flow valves.
DISCLAIMER: Values reported are based on standard conditions of 60°F natural gas with a specific gravity of 0.6.
For assistance with sizing and technical information on GasLOK™ EFV, please contact Georg Fischer.
EFV Series
Select a GF EFV Series close but larger than the max anticipated load that is expected at the meter
Tubing or Pipe Size
Select the preferred pipe size
Cushion between Min Trip Flow and Load
(%)
Enter the preferred cushion percent (usually 20%)
System Pressure
(PSIG)
*Please enter a value between 10 and 125
Enter the system pressure in gauge psi ranging from 10 - 125
Estimated Piping Length
(FEET)
Enter the estimated pipe length from the main pipeline to the meter in feet
Customer Desired Load
(SCFH)
Enter the customer's desired flow rate in SCFH
Max Anticipated Load (20% Less Than Min Trip):
(SCFH)
Max Anticipated Load (20% Less Than Min Trip):
(BTU/HrNG)
Minimum Trip Rate At 10 PSIG:
(SCFH)
Max Pressure Drop Across EFV At Closure:
(PSIG)
Protectable Line Length:
(FEET)
Approximate Time To Reset:
(MINUTES)
| Pressure (psig) | Min. Trip (SCFH) | Max. Trip (SCFH) | Protected Line Length (ft) |
WARNING: The calculations used in this program are correct, to the best of our knowledge, and represent calculations determined by GF Central Plastics. Georg Fischer accepts no responsibility for the use or application of this calculator. Every installation has its own set of variables that must be taken into consideration. The user of the calculator must insure that proper engineering practices are followed when selecting the appropriate excess flow valves.
DISCLAIMER: Values reported are based on standard conditions of 60°F natural gas with a specific gravity of 0.6.
For assistance with sizing and technical information on GasLOK™ EFV, please contact Georg Fischer.
Cushion between Min Trip Flow and Load
(%)
Enter the preferred cushion percent (usually 20%)
System Pressure
(PSIG)
*Please enter a value between 10 and 125
Enter the system pressure in gauge psi ranging from 10 - 125
Estimated Piping Length
(FEET)
Enter the estimated pipe length from the main pipeline to the meter in feet
Customer Desired Load
(SCFH)
Enter the customer's desired flow rate in SCFH
| Pressure (psig) | Min. Trip (SCFH) | Max. Trip (SCFH) | Protected Line Length (ft) |
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