Line interfaces: Design input
Buyer input should name NG or port size, mounting pattern, spool center, supply and return pressure, tank-port rating, fluid type and viscosity range, filtration, coil voltage, quantity and destination. If a positioner, feedback switch or subplate is required, say whether those items ship as one assembly. Representative production samples are the oil, the actuator and the load description—not a website photo.
Supplier answer
The factory should restate spool type, port ratings, flow limits at the stated viscosity, coil code, mounting interface and the de-energized flow paths. Ask how switching will be demonstrated with the intended actuator. A single maximum flow number cannot replace that circuit review. Compressed air demand is usually irrelevant on a hydraulic manifold; instrument-air notes belong on a pneumatic actuator RFQ instead.