I 7P50 MUD PUMP SPECIFICATIONS：
Maximum Input Horsepower: 500HP（373KW）
Stroke inches(mm): 7-3/4”(196.9)
Rated pump speed, spm : 165
Maximum liner bore, inches (mm) : 6 1/4” (158.8)
Suction connection: 8” ASA-150 lb. R.J. flang
Discharge connection, cross: 4” API-5000 lb. R.J. flang
Gear ratio: 2.742:1
II 7P50 MUD PUMP EXPENDABLES PARTS
NATIONAL
7P50 | PART NO. | PART NO. | Gaskets | PART NO |
| Liners & Liner Packing | Valve Cover Gasket | LA-61-0253 |
| SIZES | LINER | LINER PACKING | Cylinder Head Gasket | N/A |
| 4” | LA-0257-40 | LAG-0272 | | |
| 4½” | LA-0257-44 | LAG-0274 | | |
| 5” | LA-0257-50 | LAG-0276 | | |
| 5½” | LA-0257-54 | LAG-0278 | | |
| 6” | LA-0257-60 | LAG-0280 | | |
| 6¼” | LA-0257-62 | LAG-0268 | | |
| SERIES | LA – 4 WEB | LA – FULL OPEN |
| VALVE (Urethane Insert) | LA-U5B-05 | LA-5DFO-V1 |
| VALVE (Rubber Insert) | LA-5B-05 | N/A |
| VALVE SEAT | LA-5DD-B3 | LA-5DFO-S3 |
| VALVE SPRING | LA-5710-111 | LA-5710-30 |
| VALVE INSERT (Urethane) | LA-UDD-5B | LA-5DFO-SI |
| VALVE INSERT (Rubber) | LA-DD-5B | N/A |
| VALVE SEAT PULLER HEAD | LA-1700-5 | LA-1700-5FO |
| Piston Size | Bonded Pistons | Imperial Piston | Imperial Rubber Kits | Rubber Bonded | Long Life (Urethane) |
| 4” | LA-RT-400 | LA-I40HK14/15 | LA-I40HK | LA-RB-400 | LA-LL-400 |
| 4½” | LA-RT-440 | LA-I44HK14/15 | LA-I44HK | LA-RB-440 | LA-LL-440 |
| 5” | LA-RT-500 | LA-I50HB14/15 | LA-I50HB | LA-RB-500 | LA-LL-500 |
| 5½” | LA-RT-540 | LA-I54HB14/15 | LA-I54HB | LA-RB-540 | LA-LL-540 |
| 6” | LA-RT-600 | LA-I60HB14/15 | LA-I60HB | LA-RB-600 | LA-LL-600 |
| *1/4 Size are available upon request1/4英寸可根据用户需要提供 |
| |
| RODS | |
| PISTON ROD | LA-0257-A |
| SUB ROD | LA-0257-B |
| EXTENSION ROD | LA-16-0257 |
| ROD CLAMP | LA-24-0257 |
| PISTON ROD NUT | LA-7403364 |
NATIONAL 7P50
FLUID END MODULE AND ACCESSORIES
| Item | Part No. | Description | Qty per Pump |
| 1 | LA-1294150 | Discharge Module, Studded (Included Items 2 – 7) | 3 |
| 2 | LA-1294151 | Discharge Module, Only | 3 |
| 3 | LA-6300160 | Nut – Wedge Adjusting | 24 |
| 4 | LA-2408042 | Stud w/Nut – Frame | 24 |
| 5 | LA-2408043 | Stud w/Nut – Liner Bushing | 18 |
| 7 | LA-2408041 | Stud w/Nut – Discharge to Suction | 18 |
| 9 | LA-1294156 | Suction Module | 3 |
| 10 | LA-1294165 | Bushing – Liner | 3 |
| 11 | LA-1294174 | Seal Retainer | 6 |
| 12 | LA-1294172 | Valve Cover | 6 |
| 13 | LA-1290178 | Screw – Wedge Adjusting | 6 |
| 15 | LA-1290315 | Washer – Wedge Adjusting | 6 |
| 16 | LA-1290181 | Spring – Wedge Assembly | 6 |
| 17 | LA-1290376 | Wedge Assembly | 6 |
| 18 | LA-1540126 | Gasket – Valve Cover | 6 |
| 19 | LA-1292140 | Holder – Valve Guide | 6 |
| 20 | LA-1292141 | Insert – Valve Guide | 6 |
| 21 | LA-6511416 | Pin, 7/8” × 2″ Dowell | 6 |
| 22 | LA-1294160 | 1Plate – Wear | 3 |
| 23 | LA-1294170 | Connector – Discharge | 2 |
| 24 | LA-7000305-10 | Screw, ½” × 1½” Hex Head | 16 |
| 25 | LA-7602050 | Washer, Spring Lock | 16 |
| 26 | LA-1294171 | Adapter – Discharge Connector | 2 |
| 27 | LA-2410031-348 | Packing, Rectangular | 2 |
| 28 | LA-2410031-427 | Packing, Rectangular | 4 |
| 29 | LA-1294166 | Clamp – Liner | 3 |
| 34 | LA-2402560 | Stud, 1¼” × 6¼” | 16 |
| 35 | LA-6300200 | Nut 1¼” Hvy. Hex | 16 |
| 41 | LA-1540142 | Seal – Suction Manifold | 3 |
| 42 | LA-1294168 | Collar – Liner | 3 |
| 43 | LA-1294192 | Seal – Module, Wear Plate | 6 |
| 1Offered in Plain Carbon or Stainless Steel1 |
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