7P50 MUD PUMP

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