Unloading Valve:
Function: Relieves Pressure From A Pump When The System Pressure Reaches The Set Limit, Allowing The Pump To \"unload.\"
Application: ...
( Professional Electric Ball Valve At Best Price )port Size:1/2"~24" (dn15~dn600)pressure:pn10-pn64 Cl150-cl600medium:water,steam,oil,gas,etc.temperature ...