Pilot to Open Check Valve (CKB) Normally Closed, Modulating Element (LRC) Normally Closed, Modulating Element with Pilot Source from Port 1... Pressure Compensated Fully Adjustable Flow Control Valve (with Free Flow... Fully Adjustable Needle Valve (with Free Flow Check Valve) (NCB) Fully Adjustable and High Capacity Needle Valve (NFD) Fully Adjustable Needle Valve (NFC) Direct-acting Pressure Reducing/Relieving Valve (PR) Pilot Operated Reducing / Relieving Valve (PP) Pilot Operated Sequence Valve (RS) Pilot Operated Relief Valve with Vent (RV) Direct-acting Relief Valve (RD) Pilot Operated Relief Valve (RP)