# Choose correct control algorithm

Navigation: Valve Firmware > Pressure Control > Control Algorithm > # Choose correct control algorithm |

System Configuration | Constant gas flow available | Constant gas flow not available
Tv*<= 500 sec | Tv* > 500 sec
| Adaptive | PI
| PI
Soft Pump | Soft Pump

* Use the formula below to define the applicable pressure control algorithm.

| q L gasflow for learn [mbarl/s] p SFS sensor full scale pressure [mbar] Tv* Vacuum time constant [sec] CV Chamber Volume [l]