- When de-energized, the SV10-21 allows flow from 2 to 1. Flow from 1 to 2 is severely restricted in this mode.
- When energized, the valves poppet closes on its seat, blocking flow in the 2 to 1
direction. In this mode the cartridge will allow 1 to 2 flow after overcoming the solenoid force (requires 3.4 to 10.3 bar / 50 to 150 psi).