Hydraulic Valve ID's - check valve's?

[LodiCal]

2 valves below to that I would like to ID & understand. Anything you can share about them would be appreciated, especially if they are both one way check valves, why are they different? Thank you.

Valve 1: Is this some sort of one way check valve?

Valve 2: I think this is a one way check valve? It is the first valve after the pump.

 

[ptsg]

Valve 1 does look like a pressure relief valve.

Valve 2 looks to me that is possibly a flow divider. Splitting the flow in two circuits. Possibly a 50/50 flow divider.