一、JWS400 PUMP
| Rated bhp at 286 rpm | 400HP (298KW) |
| Stroke | 7“ (177.8mm) |
| Structure | PISTON / PLUNGER |
| Maximum working pressure | 10000PSI (68,950KPA） |
| Max. plunger | 4-1/2“（114.3mm） |
| Max. piston | 5-1/2“（139.7mm） |
二、JWS400 Performance Data
JWS400三、NATIONAL PUMP
| 30T-2 | | | |
| 60T-3 | 80T-3 | | |
| 100T-4 | 130T-4 | | |
| 165T-5 | 200T-5 | 250T-5 | 300Q-5 |
| JWS165 | JWS185 | JWS340 | JWS400 |
