I 8P80 MUD PUMP SPECIFICATIONS:

Maximum Input Horsepower: 800HP(597KW)
Stroke Length : 8-1/2” (216mm)
Rated pump speed, spm : 160
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: 2.463:1

II 8P80 MUD PUMP EXPENDABLES PARTS

6 1/2× 8 1/2                                                                       8-P-80

8P80PART NO.PART NO.GasketsPART NO.
Liners & Liner PackingValve Cover GasketLA-61-0255
SIZESLINERLINER PACKINGCylinder Head GasketN/A
4”LA-0256-40LAG-0272  
4½”LA-0256-44LAG-0274  
5”LA-0256-50LAG-0276  
5½”LA-0256-54LAG-0278  
6”LA-0256-60LAG-0280  
6¼”LA-0256-62LAG-0268  
6½”LA-0256-64LAG-0268  

SERIES
LA-4 WEB LA-FULL OPEN LA-G2LA-ROUGHNECK
VALVE (Urethane Insert)LA-U5B-EHLA-6FO-V1LA-1560995LA-RN6-V1
VALVE (Rubber Insert)LA-5B-EHN/AN/AN/A
VALVE SEATLA-6ADD-B4LA-6FO-S4LA-1561450LA-RN6-S4
VALVE SPRINGLA-5710-115LA-5710-115LA-1560701LA-5710-115L
VALVE INSERT (Red Thunder)LA-UDD-6ABHTN/AN/AN/A
VALVE INSERT (Urethane)LA-UDD-6BLA-6FO-SILA-1560587LA-RN6-I
VALVE INSERT (Rubber)LA-DD-6BN/AN/AN/A
VALVE SEAT PULLER HEADLA-1700-6LA-1700-6FOLA-1700-6G2LA-1700-6FO
Piston Size Bonded Pistons Imperial Piston Imperial Rubber Kits Rubber Bonded Long Life (Urethane)
4”LA-RT-400LA-I40HK14/15LA-I40HKLA-RB-400LA-LL-400
4½”LA-RT-440LA-I44HK14/15LA-I44HKLA-RB-440LA-LL-440
5”LA-RT-500LA-I50HB14/15LA-I50HBLA-RB-500LA-LL-500
5½”LA-RT-540LA-I54HB14/15LA-I54HBLA-RB-540LA-LL-540
6”LA-RT-600LA-I60HB14/15LA-I60HBLA-RB-600LA-LL-600
6½”LA-RT-640LA-I64HB14/15LA-I64HBLA-RB-640LA-LL-640
*1/4 Size are available upon request1/4
RODS 
PISTON RODLA-0259-A
SUB RODLA-0259-B
EXTENSION RODLA-16-0259
ROD CLAMPLA-24-0259
PISTON ROD NUTLA-7403364

NATIONAL 8P80

FLUID END MODULE AND ACCESSORIES

ItemPart No.DescriptionQty per Pump
1LA-1291280Discharge Module, Studded (Included Items 2 – 10)3
2LA-1291281Discharge Module, Only3
3LA-6300180Nut – Frame24
4LA-2408026Stud – Frame24
5LA-6300120Nut – Liner Bushing18
6LA-2408025Stud – Liner Bushing18
7LA-6300241Nut – Suction to Discharge Module18
8LA-2408034Stud – Suction to Discharge Module18
9LA-6300220Nut – Threaded Ring72
10LA-2408019Stud – Threaded Ring1 72
11LA-1290338Suction Module, Studded (Included Items 9, 10, 14)3
12LA-1290339Suction Module, Only3
13LA-1291165Bushing – Liner3
14LA-1290174Seal Retainer6
15LA-1290307Valve Cover6
16LA-1290178Screw – Wedge Adjusting6
17LA-6300160Nut – Wedge Adjusting6
18LA-1290315Washer – Wedge Adjusting6
19LA-1290308Threaded Ring6
20LA-1290376Wedge Assembly(included items 21-22)6
21LA-1290179Wedge, Set 6
22LA-1290181Spring, Wedge Retaining6
23LA-1540126Gasket – Valve Cover6
24LA-1292140Holder – Valve Guide6
25LA-1292141Insert – Valve Guide6
26LA-6511416Pin, 7/8× 2″ Dowell6
27LA-12903571Plate – Wear3
28LA-1290342Connector – Discharge2
29LA-7000305-11Screw, ½” × 1½” Hex Head16
30LA-7619050Washer, ½” Lock16
31LA-1290343Adapter – Discharge Connector2
32LA-2410031-348Packing, Rectangular2
33LA-2410031-427Packing, Rectangular4
34LA-1291166Clamp – Liner3
35LA-1590051Seal – Suction Manifold3
36LA-1291286Spacer – Discharge, Studded(included intems 37-39)2
37LA-1291287Spacer-Discharge2
38LA-2402560Stud – Discharge Spacer16
39LA-6300200Nut – Discharge Spacer16
40LA-7006607Capscrew16
41LA-1290344Seal – Module, Wear Plate6
42LA-1290345Seal-Discharge Spacer2
43LA-6908033Ring, Oval Joint 2
1Offered in Plain Carbon or Stainless Steel1

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