Table 2 Technical comparison of the present water hydraulic directional valves.
Inventor | Valve structure | Function | Materials | Pressure/MPa | Flow/L/min |
|---|---|---|---|---|---|
Rexroth | Seat-type valve | 2/2 | Stainless-steel | 42 | 12/25/40 |
Danfoss | Seat-type valve | 4/3 | Stainless-steel | 14 | 60 |
Han | Seat-type valve | 2/2 | Al9-4、304 | 25 | 1100 |
Liu | Seat-type valve | 2/2 | QAl9-4、17-4PH | 16 | 160 |
Yang | Seat-type valve | 2/2 | 316 L | 1.5 | 2.5 |
Liao | Seat-type valve | 3/2 | 9Cr18、PEEK | 31.5 | 500 |
Zhao | Seat-type valve | 3/2 | Stainless-steel | 31.5 | 370 |
Majdic | Spool valve | 4/3 | X105CRMO17 | 16 | 30 |
Ebara | Spool valve | 4/3 | 316/Polymer | 7 | 35 |
Water Hydraulics | Spool valve | 4/3 | 316/Polymer | 16 | 30 |
Zhang et al. (this study) | Spool valve | 4/3 | 316 | 25 | 80 |
