Check the listing for details. Hydraulic Adjustable Variable Flow Control Valve w/ Relief, 0-16 GPM, 1/2” NPT. Condition: New. Listed at 90.00 USD. Pressure Compensating Variable Flow Control Valve with Relief ValveUsed to stop or start a hydraulic motor or cylinderCan vary speed over wide rangeOnce set, will maintain constant speed even with variation of loadsExcess flow is returned to tank or can be used to power another functionFeatures:Adjustable Flow Rate: 0-16 GPMInternal Adjustable Relief Valve (preset to 1500 PSI)Cast Iron BodyBuna N O-Ring SealsPort Size: 1/2” NPTMax Working Pressure: 3000 PSIReplaces:Brand FCR51-1/2 PFCR51-1/2Ports:IN: Inlet PortCF (Controlled Flow): flow coming from this port is pressure compensated and proportional. Flow can vary from closed to fully open depending on the position of the lever.EX (Excess Flow): Flow coming from this port is pressure compensated. If lever is set to 0 all flow will exit the valve from this port. Relief Valve Operation:Comes preset at 1500 PSIRelief valve can be adjusted anywhere from 500 PSI to 3000 PSIRemove acorn nut to adjust pressureTurn set screw clock wise to increase pressure settingOne complete turn of set screw increases/decreases pressure by 300 PSIEX Port must be plumbed back to tank for relief valve to operate