Sdv40-A88A-Hdv799-2Xhdv791-Tr88 Inlet Sae 16 Ports At Side & Top With Mrv Installed Preset At 2000Psi Screw Adjustable 800 - 2500Psi 1St Section Hi-Boys D/A Cylinder Spools Metering Air Shift Spring Return Sae 12 Ports Relief Ports A & B Plugged 2Nd & 3Rd Sections Hi-Boys D/A Cylinder Spools Metering Air Shift Spring Return Sae 12 Ports Relief Port A Plugged Port B Anti-Cavitation Relief Preset At 2500Psi Outlet Sae 16 Ports At Side & Top