High Pressure Plunger Pump · Frame size 68 PFR 6831

Name: 6831
Brand: CAT PUMPS
SKU: 6831

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with 316 stainless steel block-style manifolds, 316 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings.

Request this pump Data sheet (PDF) Spare parts

Technical specifications

Flow rate	151 l/min
Operating pressure	160 bar
Speed	625 min⁻¹
Inlet port	1 1/2" NPT
Discharge port	1" NPT
Shaft diameter	45 mm
Material	Stainless Steel

Downloads

CAD files

STEP – 6831 (catpumps.com)

Spare parts

Click an item in the drawing or in the parts list to add it to your request list. We turn it into a quotation – no order is placed.

8 kits bundle wearing parts of this pump ↓

Skip the drawing, go to the parts list

Parts list

Item	Part no.	Description	Qty
5	89728	Screw, HH (M10 x 40)S	8
6	15847	Lockwasher (M10)S	8
7	19934	Washer, Flat (M10)S	8
8	29443	Cover, Bearing, OuterALE	2
10	29444	O-Ring, Bearing Cover - 70DNBR	2
11	11443	Seal, Oil, Crankshaft - 70DNBR	2
12	126594	Washer, Shim (M120 x 0.3) 0 - 2STCP	0-2
13	126595	Washer, Shim (M120 x 0.5) 0 - 2STCP	0-2
15	29441	Bearing, RollerSTL	2
16	29442	Cover, Bearing, InnerSTL	2
17	29444	O-Ring, Bearing Cover - 70DNBR	2
20	126612	Assembly, Connecting Rod (Includes: 21, 22)BBHS	3
21	126560	Washer, LockingSTCP	3
22	126593	Washer, Flat (M10.5)STCP	6
25	29440	Crankshaft, Dual End (M65.5)FCM	1
32	43211	Cap, Oil FillerABS	1
33	14177	O-Ring, Oil Filler Cap - 70DNBR	1
34	126743	Bolt, Eye (M12x1.75) (For Lifting Pump Only)STCP	1
38	129343	Gasket, Flat FlexibleRBR	1
39	27769	Dip Stick (Blue)ABS	1
40	89627	Screw, HH (M10 x 30)S	8
41	15847	Lockwasher (M10)S	8
42	19934	Washer, Flat (M10)S	8
48	25625	Plug, Drain (1/4" x 19 BSP[M])STCP	1
49	23170	O-Ring, Drain Plug - 70DNBR	1
50	29438	Cover, RearALE	1
51	129386	Gasket, Rear CoverNBR	1
53	133667	Crankcase Assembly (Includes: 54)ALE	1
54	43282	Pin, GuideS	2
64	29481	Pin, CrossheadCM	3
65	48735	Rod, PlungerSSZZ	3
69	126588	Washer, Oil SealSTCP	3
70	29454	Seal, Oil, Crankcase - 80DNBR	3
75	43865	Slinger, BarrierS	3
88	45676	Washer, Keyhole (M16)S	3
90	43921	Plunger (M40 x 145)CC	3
95	89778	Stud, Plunger Retainer (M10x135)SS	3
96	20189	Back-up-Ring, Plunger RetainerPTFE	3
97	11345	O-Ring, Plunger Retainer - 70DNBR	3
98	44085	Gasket, Plunger Retainer (M7) Model 3501, 3501C, Gasket, Plunger Retainer (M10) Model 3511, 3511CSS	3
99	44084	Retainer, Plunger (M10)SS	3
100	703084	Retainer, SealD	3
106	44113	Seal, Low-Pressure, with SS-SpringNBR	3
108	45381	Spacer, Low-Pressure, SealSS	3
110	701321	Manifold Inlet, Block-StyleSS	1
111	701116	Plug, Inlet [1-1/2" NPT(M)]SS	1
112	701632	O-Ring, Spacer, InletNBR	6
113	701329	Backup Ring, Spacer, InletPTFE	6
114	701327	Spacer, InletSS	3
117	89694	Screw, HSH (M16 x 110), UpperS	6
118	701077	Plug, [1/4" NPT(M)]SS	3
126	45367	Adapter FemaleSS	3
127	44609	V-PackingSTG	6
128	704480	Adapter, MaleSS	3
155	48860	O-Ring, V-Packing Cylinder - 90DNBR	3
156	48362	Backup Ring, V-Packing, Spacer, OuterD	6
157	45369	Spacer, V-PackingSS	3
159	48860	O-Ring, V-Packing Cylinder - 90DNBR	3
160	44756	Pin, Guide IMDMS	2
162	48363	Backup-Ring, Valve SeatD	6
163	26142	O-Ring, Seat - 80DNBR	6
164	44612	Seat, SteppedSS	6
166	44108	ValveSS	6
167	44109	Spring, ValveSS	6
168	44728	Retainer, SpringPVDF	6
170	44729	Washer, Spring RetainerSS	6
171	44644	Coil Spring (70kg), Valve PlugSS	6
172	89827	O-Ring, Valve Plug - 90DNBR	6
173	48364	Backup-Ring, Valve PlugD	6
174	701432	Plug, ValveSS	6
175	87951	Screw, HSH (M10x30)S	36
185	701431	Manifold, Discharge, Block-StyleSS	1
188	701279	Screw, HSH (M12 x 100), LowerS	4
193	89694	Screw, HSH (M16 x 110), UpperS	8
250	29445	Protector, Shaft (Included w/pump)ALE	1
255	33243	Mount, DirectSTZP	1
256	29649	Washer, Slant (M16) (Ensures Proper Alignment Between the Rail and Mounting Screw)STCP	4
259	126604	Rail, Box (Included with Pump)STCP	2
–	6124	Gasket, Liquid (3 oz. / 0,1 l)	1
–	6139	Lubricant, Anti-Seize (8 oz) (Model 1531)	1
–	34314	Kit, Oil Drain (3/8" x 48") (Not Shown)	1
–	43048	Key (M14 x 9 x 90) 1	1
–	88902	Stud (M16 x 277) For Removal of DM and IM) (Not Shown) 2	2
–	701322	Manifold Inlet, Block-Style, Flushed (Models 6801K, 6811K)SS	1
–	819010	Assembly, Crankcase, Cast Iron Conversion (Not Shown) 1	1
–	828710	Protector, Oil Cap with Foam Gasket 1	1
–	910003	Head, Complete, Block-Style with NBR Seals and O-Rings (Model 6831)	1
–	910004	Head, Complete, Block-Style with NBR Seals and O-Rings (Model 6831K)	1
–	990663	Assembly, Flushing, 5 Gal, 115V, 1.1 Amp, 1/2" NPT (Model 6821K) 1	1
–	6138	Oil, Crankcase, Can 5l	2

in the request list covered by a requested kit

Seal and valve kits

A kit bundles the wearing parts of one assembly. Selecting it highlights the items it covers in the drawing and the parts list – once requested, they stay marked.

Seal kits

Seal kit

701647

NBR (STD)Medium Nitrile (Buna-N)

contains 8 items · one kit per pump
Parts list
- 97 11345 O-Ring, Plungerhalter 3×
- 106 44113 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701632 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 127 44609 V-Packung, Set (6 Stück) 3×
- 155 48860 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48362 Stützring, Distanzstück, V-Packung 6×
- 159 48860 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

33708

FPM (0.0110)Fluorocarbon

contains 8 items · one kit per pump
Parts list
- 97 11375 O-Ring, Plungerhalter 3×
- 106 44740 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701328 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 127 44741 V-Packung, Set (6 Stück) 3×
- 155 20137 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48362 Stützring, Distanzstück, V-Packung 6×
- 159 20137 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

703476

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 8 items · one kit per pump
Parts list
- 97 701490 O-Ring, Plungerhalter 3×
- 106 46955 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 701973 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 127 44609 V-Packung, Set (6 Stück) 3×
- 155 701492 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48362 Stützring, Distanzstück, V-Packung 6×
- 159 701492 O-Ring, Distanzstück, V-Packung, außen 3×
Seal kit

31192

IPFE (0.0770)I-Perfluoroelastomer

contains 8 items · one kit per pump
Parts list
- 97 702961 O-Ring, Plungerhalter 3×
- 106 76398 Dichtung, Niederdruck, m/SS-Feder 3×
- 112 703159 O-Ring, Distanzstück 6×
- 113 701329 Stützring, Distanzstück 6×
- 127 44609 V-Packung, Set (6 Stück) 3×
- 155 703291 O-Ring, Distanzstück, V-Packung, innen 3×
- 156 48362 Stützring, Distanzstück, V-Packung 6×
- 159 703291 O-Ring, Distanzstück, V-Packung, außen 3×

Valve kits

Valve kit

34017

NBR (STD)Medium Nitrile (Buna-N)

contains 11 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 26142 O-Ring, Ventilsitz 3×
- 164 44727 Ventilsitz (3520, 3520C) 3×
- 164 44612 Ventilsitz 3×
- 166 43932 Ventil (3520, 3520C) 3×
- 166 44108 Ventil 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 89827 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

31955

FPM (0.0110)Fluorocarbon

contains 9 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 14330 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 11747 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

31952

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 9 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 701493 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 701494 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

76617

IPFE (0.0770)I-Perfluoroelastomer

contains 12 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 162 44614 Stützring, Ventilsitz 3×
- 163 702808 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 703169 O-Ring, Ventilstopfen 3×
- 172 701369 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
- 173 20388 Stützring, Ventilstopfen 3×